lisa pathfinder transponder requirement...

wilson_r

EadsAstrium

LISA Pathfinder

S2.ASU.RS.2014Issue 1

of 78

EADS Astrium Ltd owns the copyright of this document which is supplied in confidence and which shall not be used for any purpose other than that for which it is supplied and shall not in whole or in part be reproduced, copied, or communicated to any person without written permission from the owner.

S2.ASU.RS.2014 ISS01 X-Band Transponder Requirement Spec.doc

INTENTIONALLY BLANK

LISA Pathfinder


of 78



CONTENTS

1. INTRODUCTION AND SCOPE.....................................................................................................................6 1.1 Note to User ...........................................................................................................................................6 1.2 Introduction.............................................................................................................................................6 1.3 Scope .....................................................................................................................................................7 1.4 Summary Description .............................................................................................................................7

2. DOCUMENTS................................................................................................................................................9 2.1 Applicable Documents............................................................................................................................9 2.2 Standards ...............................................................................................................................................9 2.3 Reference Documents............................................................................................................................9

3. UNIT FUNCTIONAL AND PERFORMANCE REQUIREMENTS ................................................................10 3.1 Unit/Equipment Definition.....................................................................................................................10

3.1.1 Redundancy ...............................................................................................................................10 3.1.2 Applicability of Performance Characteristics..............................................................................10

3.2 Transponder Performance Requirements............................................................................................11 3.2.1 General Transponder Requirements..........................................................................................11 3.2.2 Receiver Performance Requirements ........................................................................................12 3.2.3 Transmitter Performance Requirements....................................................................................19 3.2.4 Ranging Requirements ..............................................................................................................24

3.3 X-Band TT&C Command & Housekeeping..........................................................................................28 3.3.1 Receiver Housekeeping .............................................................................................................28 3.3.2 Transmitter Housekeeping .........................................................................................................29 3.3.3 List of High Power Commands...................................................................................................30 3.3.4 List of Housekeeping Signals.....................................................................................................30

4. UNIT SPECIFIC DESIGN AND INTERFACE REQUIREMENTS ...............................................................32 4.1 Mechanical Requirements....................................................................................................................32

4.1.1 Mass...........................................................................................................................................32 4.1.2 Envelope ....................................................................................................................................32 4.1.3 Mounting.....................................................................................................................................32

4.2 Electrical Requirements .......................................................................................................................33 4.2.1 Power Consumption...................................................................................................................33 4.2.2 Power Interfaces ........................................................................................................................33 4.2.3 RF Interfaces..............................................................................................................................34 4.2.4 Housekeeping Command & Telemetry Interfaces .....................................................................34 4.2.5 X-Band Digital TC Channel Interface (XTC) ..............................................................................34 4.2.6 X-Band Digital TM Channel Interface (XTM) .............................................................................34 4.2.7 X-Band Receiver Lock Status Interface (RLS)...........................................................................35 4.2.8 Software Data Interfaces............................................................................................................35

LISA Pathfinder


of 78



4.3 Thermal Requirements.........................................................................................................................35 4.4 Magnetic Moment Requirements .........................................................................................................35 4.5 Gravitational Requirements..................................................................................................................37

5. DIPLEXER REQUIREMENTS.....................................................................................................................38 5.1 Functional Requirements .....................................................................................................................38 5.2 Frequencies..........................................................................................................................................38

5.2.1 Passband Frequencies ..............................................................................................................38 5.2.2 Rejection Frequencies ...............................................................................................................38 5.2.3 Spurious Transmit Outputs ........................................................................................................39 5.2.4 Receiver Spurious Responses...................................................................................................41

5.3 Power Handling ....................................................................................................................................42 5.4 Impedance............................................................................................................................................42 5.5 Mass .....................................................................................................................................................42 5.6 Envelope...............................................................................................................................................42

6. GDIR APPLICABILITY MATRIX..................................................................................................................43

7. REQUIREMENT/SECTION CROSS REFERENCE....................................................................................76

TABLES Table 3.2-1: Unwanted Receiver Inputs ..........................................................................................................16 Table 3.2-2: Protection of Launcher Receivers ...............................................................................................17 Table 4.4-1: DC/AC Magnetic Field Requirements .........................................................................................37 Table 5.2-1: Diplexer Rejection Characteristics ..............................................................................................39 Table 5.2-2: Spurious Output Levels...............................................................................................................39 Table 5.2-3: Radio Frequency (Narrowband spectral) Receiver Notches.......................................................40 Table 5.2-4: Radio Frequency (Wideband continuum) Receiver Notches......................................................40 Table 5.2-5: Deep Space Receiver Notches ...................................................................................................40 Table 5.2-6: Narrowband Disturbances...........................................................................................................42

FIGURES Figure 1.2-1: The LISA mission will use an ultra-precise interferometry through three satellites flying in

formation on an Earth-like orbit to measure ripples in space-time ............................................................6 Figure 1.4-1: Lisa Pathfinder X-Band TT&C Block Diagram .............................................................................8 Figure 3.2-1: Data Valid Timing.......................................................................................................................18

LISA Pathfinder


of 78



INTENTIONALLY BLANK

LISA Pathfinder


of 78



1. INTRODUCTION AND SCOPE

1.1 Note to User

This document establishes the design, performance, interface and verification requirements of the X-Band Transponder for the Tracking, Telemetry and Command Subsystem on board the Lisa Pathfinder Satellite.

Lisa Pathfinder is the second of the Small Missions for Advanced Research and Technology (SMART), an element of the European Space Agency’s “Cosmic Vision” plan for scientific projects.

1.2 Introduction

LISA is a co-operative program between ESA and NASA to detect and measure `ripples' in the fabric of space-time to verify tenets of fundamental physics. The program includes two space missions; The LISA PATHFINDER mission and the LISA mission.

LISA will consist of three spacecraft flying in a quasi-equilateral triangular formation, in a trailing Earth orbit at some 20 deg behind the Earth (see Figure 1.2-1). Within each spacecraft, a measurement system consisting of two test masses, associated laser interferometer measurement systems, and electronics will detect and measure low frequency gravitational waves. The test masses are maintained in a drag-free environment, i.e. shielded from spurious external forces, by using low thrust propulsion. This mission is currently in its formulation stage.

LISA PATHFINDER is a precursor mission to LISA that aims to flight test most of the challenging technologies necessary for LISA.

Figure 1.2-1: The LISA mission will use an ultra-precise interferometry through three satellites flying in formation on an Earth-like orbit to measure ripples in space-time

Among these technologies, the demonstrations of the LISA Technology Package (LTP) and the µPropulsion Technologies have been identified as mandatory. Additionally the mission will enable the in-flight demonstration of the NASA provided DRS (Disturbance Reduction System).

The Lisa Pathfinder spacecraft, will demonstrate both electric and coloidal micro-thrusters during its 1 year mission at the Earth-Sun Langrange point.

LISA Pathfinder


of 78



1.3 Scope

This document contains the contractually relevant requirements and constraints for the LISA Pathfinder project. This includes:

• The design and interface requirements of subject hardware

• The general testing and verification requirements

Requirements within this document are shown in an italic font. Each requirement is proceeded by a summary line that contains the following fields, delimited by "/".

• <Doors Requirement Number> TRAN-xyz. This is a unique number, assigned consecutively

• <Created From> Shows parent requirement

• <Test Method> T= Test, A = Analysis, I = Inspection, R = Review of Design

If tables are considered as part of a requirement they are referenced clearly in the text and inserted after and separated from the requirement and are managed as free text attached to the identifier requirement.

The trace to the upper level requirements (Upper Links), shall be managed using the following format:

• AAA-NNNN where AAA is a label associated to the upper document and NNNN the requirement identifier of this upper level.

• Or CREATED key word if the requirement has no link with upper level

All document elements not presented in the format explained above are not requirements and will not be verified or tracked.

1.4 Summary Description

The Lisa Pathfinder X-band TT&C subsystem is the spacecraft Tracking, Telemetry & Command subsystem operating in X-band. It acts as the interface between the satellite and dedicated ground stations, and represents one essential part of the S/C command and control capability.

The X-band TT&C subsystem consists of all elements for RF reception, demodulation, modulation and transmission. The fundamental functions are:

• to receive and demodulate X-band uplink signals for telecommand purposes,

• to transmit X-band downlink telemetry data signals,

• to provide a ranging channel and a coherent mode of operation to allow range and range-rate (relative Doppler shift) measurements.

The X-Band Transponder supports the TT&C in order to guarantee communication with ground during all mission phases.

The general block diagram of the on-board TT&C X-band subsystem is schematically depicted in Figure 1.4-1 below.

LISA Pathfinder


of 78

Document Autogenerated from DOORS Module : /LISA Pathfinder/Level 3/Electrical/X-Band Transponder Requirement Specification S2.ASU.RS.2014 ISS01 X-Band Transponder Requirement Spec.doc

Transponder 1

Transmitter1

Receiver1

Ranging & Coherency

Transponder 2

Transmitter2

Receiver2

Ranging & Coherency

TM

TC

TM

TC

Low Gain Antenna 1

Medium Gain Antenna

Low Gain Antenna 2

Diplexer1

Diplexer2

Coupler

High Pwr ~5W Low Pwr ~70mW (TBC)

LHC

RHC

RHC

Sw2 PosA

Sw1 PosB

High Pwr ~5W Low Pwr ~70mW (TBC)

Figure 1.4-1: Lisa Pathfinder X-Band TT&C Block Diagram

LISA Pathfinder


of 78

Document Autogenerated from DOORS Module : /LISA Pathfinder/Level 3/Electrical/X-Band Transponder Requirement Specification S2.ASU.RS.2014 ISS01 X-Band Transponder Requirement Spec.doc

2. DOCUMENTS

2.1 Applicable Documents

The following documents are applicable documents to this specification.

[AD 05] S2.ESC.ICD.5001 Lisa Pathfinder Space to Ground Interface Control Document.

[AD 10] S2.ASU.RS.1005 Lisa Pathfinder PA Requirements for Subcontractors

[AD 17] S2.ASU.RS.2031 Lisa Pathfinder GDIR

2.2 Standards

[STD 06] ESA-PSS-04-106 Packet Telemetry Standard

[STD 09] ESA-PSS-04-107 Packet Telecommand Standard

[STD 07] ESA-PSS-04-103 Telemetry Channel Coding Standard

[STD 10] ESA-PSS-04-104 Ranging Standard

[STD 11] ECSS-E-50-05A Radio Frequency and Modulation Standard

2.3 Reference Documents

[RD 06] S2.ASU.LI.1006 Lisa Pathfinder Acronyms List

LISA Pathfinder


of 78



3. UNIT FUNCTIONAL AND PERFORMANCE REQUIREMENTS

3.1 Unit/Equipment Definition

TRAN-47/[AD 05]/R

Each X-Band Transponder asembly shall comprise a Receiver, a Transmitter and a Diplexer.

3.1.1 Redundancy

Note: The use of two complete and independent transmitters and receivers is intended to ensure redundant operation at subsystem level.

3.1.2 Applicability of Performance Characteristics

TRAN-51/CREATED/R

Unless otherwise explicitly stated, the performance characteristics shall be achieved throughout the equipment lifetime for all environmental and operating conditions including power bus variations as specified in the applicable documents.

LISA Pathfinder


of 78



3.2 Transponder Performance Requirements

3.2.1 General Transponder Requirements

3.2.1.1 Functional Modes of Operation

TRAN-55/SRS-1713/R

The following operational modes of the transponder shall exist:

Transmitter modes (in coherent and non-coherent mode)

• Unmodulated Carrier

• Telemetry only

• Ranging only

• Ranging + Telemetry

Receiver modes

• Unmodulated Carrier

• Telecommand only

• Ranging only

• Ranging + Telecommand

TRAN-56/SRS-1713/R

The Transponder shall support simultaneous transmit and receive operations when in any of the above modes.

TRAN-57/Derived from SRS-1715/R

When the transmitter is powered by a rising power supply voltage, it shall be in the mode determined by the previous status of the internal Ranging ON/OFF and Coherency ON/OFF commands.

TRAN-58/Derived from [STD 10]/R

The status of the Ranging ON/OFF and Coherency ON/OFF mode selection shall only be changeable by telecommand.

TRAN-59/Derived from SRS-1713/T

If following a coherent mode selection command, the receiver loses lock for more than 0.2s, then the transponder shall return to non-coherent mode, independently of the status of the previous COH/NCOH commands.

LISA Pathfinder


of 78




When receiver lock is re-acquired, the transponder shall automatically return to coherent mode if coherent mode has been previously selected via telecommand.

TRAN-61/SRS-1714 & SRS-1771/R

It shall always be possible to select by telecommand the Coherent or Non-Coherent mode and the Ranging On/Ranging Off mode.

3.2.1.2 Switch-On / Warm-up Requirements

TRAN-63/CREATED/T

All transponder performances shall be reached after a warm-up time not exceeding 5 minutes, except for the receiver rest frequency stability, the transmitter frequency stability in the non-coherent mode and the group delay stability which shall be compliant within a maximum of 10 minutes.

3.2.1.3 Launch Mode

The Receiver of the Transponder assembly will be switched ON during launch. The Transmitter of the Transponder assembly will be switched OFF during launch.

TRAN-66/CREATED/R

The Receiver shall be able to withstand the launch environment whilst powered.

3.2.2 Receiver Performance Requirements

3.2.2.1 Demodulation Characteristics

TRAN-69/Derived from SRS-623 & [AD 05]/T

The uplink modulation type shall be phase modulation (PM) of the uplink carrier.

TRAN-70/Derived from SRS-623 & [AD 05]/T

The telecommand base-band modulation shall be NRZ-L/PSK on a sinusoidal subcarrier.

TRAN-71/[AD 05]/T

The telecommand subcarrier frequency shall be 16kHz.

TRAN-72/Derived from SRS-626 and SRS-1245/R

The receiver shall be able to receive at least 2 telecommand symbol rates in the range 62.5s/s to 4ks/s.

TRAN-73/SRS-626, SRS-1245/T

The Lisa Pathfinder X-Band Transponder telecommand symbol rate shall be 2ks/s.

LISA Pathfinder


of 78




The receiver shall PM demodulate the telecommand subcarrier and the ranging tones. The ranging tones shall be passed to the transmitter.


The telecommand baseband signal recovery shall be performed in the receiver after BPSK demodulation and bit synchronisation, i.e. the Receiver output shall be a digital data and clock interface.

3.2.2.2 Rest Frequency

The receiver rest frequency is defined as the uplink frequency for a zero static phase error (SPE), measured with 1 sec integration time.

TRAN-78/SRS-624 & [AD 05]/R

The receiver rest frequency shall be selectable at the time of manufacture in the range 7190 MHz - 7235 MHz.

TRAN-79/SRS-624 & [AD 05]/R

The nominal carrier frequency of the Lisa Pathfinder X-Band uplink shall be 7230.4034 MHz (TBC).

TRAN-80/[RD 96]/T

The initial setting of the rest frequency shall be within ± 10kHz of the assigned value, at a temperature of 22°C ± 3°C.

TRAN-81/Derived from [RD 96] & GDI-32/A

The rest frequency shall not vary by more than:

• ± 35kHz from the nominal value, including initial setting inaccuracies and all variations due to the specified worst case environment over the design lifetime (excluding ageing drift).

• ± 15KHz relative to the initial setting, as a result of ageing during the design lifetime after having been stored for a maximum of 1.5 years.

3.2.2.3 PLL Equivalent Phase-Lock Noise Bandwidth

TRAN-83/[STD 11]/T

The nominal phase-lock loop two-sided noise bandwidth 2BL shall be 800Hz at carrier acquisition threshold.

LISA Pathfinder


of 78



3.2.2.4 Noise Figure

TRAN-85/CREATED/T

The receiver noise figure without diplexer shall be lower than 2dB at the Carrier Acquisition Threshold.

TRAN-86/CREATED/T,R

The receiver noise figure shall be measurable via an external test connector.

3.2.2.5 Carrier Acquisition and Tracking

The carrier acquisition threshold is defined as the minimum input RF power level at which the signal to noise ratio in 2BL (phaselock loop bandwidth) is greater than 10dB.

TRAN-89/[RD 45]/T

The worst case operating carrier acquisition threshold of the X-Band Receiver shall be lower than -110dBm at the internal receiver input interface, with a source noise temperature of 300K and using a non modulated carrier.

TRAN-90/Derived from [STD 11]/T,A

The receiver shall acquire a non modulated uplink carrier swept through the rest frequency in accordance with the Link Acquisition Procedure defined in [STD 11] for all carrier levels between acquisition threshold and -50dBm with a probability better than 99%.

TRAN-91/CREATED/T,R

For this mission the receiver shall be designed to accommodate a ground station sweep rate of upto 27kHz/s combined with a doppler sweep rate of upto 5.6kHz/s.

TRAN-92/CREATED/T,R

The Transponder receiver shall be able to track and demodulate the TC uplink signal, during all mission phases, in the presence of doppler offsets and the corresponding differences due to doppler that will be experienced by the carrier and subcarrier frequencies on the TC uplink.

TRAN-93/Derived from [STD 11]/T

The receiver shall maintain lock while the input carrier is swept about the nominal receiver frequency in accordance with the Link Acquisition Procedure defined in [STD 11].

TRAN-94/CREATED/T,R

The supplier shall design the transponder to meet all performance requirements for a tracking range with an input frequency offset of upto ± 270kHz relative to the nominal defined uplink carrier frequency

LISA Pathfinder


of 78



TRAN-95/CREATED/T,R

After the application of Telecommand and Ranging modulation on the uplink the receiver shall be able to track an uplink signal with a residual carrier component of -116dBm at the internal receiver input interface over the tracking range specified in TRAN-94.

3.2.2.6 RF Input Limits

TRAN-97/CREATED/T

All specified receiver performances shall be met with a signal source load having a VSWR up to 1.3, any phase.

TRAN-98/CREATED/T

The receiver shall withstand any antenna source impedance without permanent damage, in all modes of operation.

TRAN-99/CREATED/T

The receiver shall withstand an input power of 0dBm in the receive frequency range for 5 minutes without permanent damage.

3.2.2.7 Receiver Spurious Response

See Section 5.2.4 .

3.2.2.8 Back Radiation

3.2.2.8.1 Satellite Receiver Protection

TRAN-104/CREATED/T

The level of back radiation and performance of the input filtering of the two receivers shall be such that each receiver shall maintain its nominal performances when sharing the same signal source with another identical receiver in working mode, with the two transponders operating with 6dB of inserted isolation and with any phase shift at their inputs.

TRAN-105/CREATED/T,A

During launch the receiver performance and functionality shall not exhibit damage or performance degradation subsequent to exposure to the following unwanted signals present at the Diplexer antenna port:

• Over the frequency range 0.01 MHz to 30 GHz, a power density up to -17.4 dBm in any 4 kHz.

LISA Pathfinder


of 78




For the duration of the mission the receiver performance shall not be degraded in the presence of unwanted signals (defined in Table 3.2-1) simultaneously present at the Diplexer antenna port.

Frequency Range (MHz) Maximum Level

0.01 to 7228.4034 -17.4dBm

7228.4034 to 7232.4034 -144 dBm

7232.4034 to 40,500 -17.4dBm

8495 MHz +/- 1.25 MHz 37dBm (Total)

Table 3.2-1: Unwanted Receiver Inputs

3.2.2.8.2 Launcher Receiver Protection


The level of back radiation from each receiver measured at the antenna port of the corresponding diplexer shall not exceed the RF level mask shown in Table 3.2-2.

LISA Pathfinder


of 78



Freq RF Level

(MHz) dBm 0.01 83.3 120 1.7

120.1 -5.2 130 -5.8

130.1 44.1 250 38.5 250 -4.6 1000 -16.7 1000 -16.7 1015 -16.8 1015 -23.7 1050 -24.0 1050 -17.1 1570 -20.6 1570 -97.5 1620 -97.8 1620 -62.8 1640 -62.9 1640 -21.9 2700 -25.3 2700 -42.2 2750 -42.4 2750 -42.4 2900 -42.8

2900.1 -25.9 7500 -34.2

7500.1 -34.2 7600 -34.3

7600.1 -34.3 10000 -36.7 30000 -46.2

Table 3.2-2: Protection of Launcher Receivers

LISA Pathfinder


of 78



3.2.2.9 TC Demodulation Performances

3.2.2.9.1 Receiver TC Behaviour

TRAN-113/CREATED/T

PM demodulation losses shall be lower than 1.1dB and BPSK demodulation losses lower than 1.5dB for all data rates.

3.2.2.9.2 TC Modulation Index

TRAN-115/[STD 11]/R

The uplink TC modulation index shall be in the range 0.1 to 1.4 rad.

TRAN-116/[AD 05]/T

The nominal TC modulation index for the Lisa Pathfinder uplink shall be 1.25 rad.

3.2.2.9.3 Data Valid

TRAN-118/Derived from [AD 05]/T

A data valid signal shall be generated in order to indicate an output data stream quality of 9.6 dB Eb/No or better, taking into account the effects of demodulation losses. The 'data valid' timing shall be as indicated in Figure 3.2-1 below, where T1 and T2 shall be less than 60% of the duration of 128 uplink bit periods for the specified uplink data rate.

Figure 3.2-1: Data Valid Timing

3.2.2.9.4 TC Timing


The receiver shall support the uplink acquisition procedure defined in [STD 11].

TRAN-122/CREATED/T

The on-board telecommand decoder subcarrier acquisition and bit lock acquisition shall be achieved using the acquisition sequence transmitted before all uplink messages and shall not require a frequency sweep.

LISA Pathfinder


of 78



3.2.2.9.5 Bit Synchronisation


The demodulator shall not lose bit synchronisation when the transponder receives a telecommand packet according to the ESA Packet Telecommand Standard, PSS-04-107, paragraph 5.2 [STD 09], and with any given number of codeblocks, each consisting of seven octets of zeros (information field) and the refering error control field (seven “1” and a final “0” as check bits), i.e.:0000 0000 0000 0000 0000 0000 0000 0000 0000 0000 0000 0000 0000 0000 1111 1110. The generated check bits provide almost the minimum number of transitions, i.e. 2 transitions in a field of 64 bits.

3.2.2.9.6 Receiver Bit Error Rate

TRAN-126/CREATED/T

The receiver BER shall be 1x10E-5 over the full tracking sweep range for an Eb/No of 9.6dB, taking into account the effects of demodulation losses.

3.2.3 Transmitter Performance Requirements

3.2.3.1 Modulation Functions

TRAN-129/SRS-1751/T,R

The transmitter shall contain the following modulation functions;

• carrier modulation (PM)

• subcarrier modulation (BPSK)

TRAN-130/Derived from SRS-1713/T,R

The carrier modulation function shall perform phase modulation (PM) of the downlink carrier frequency independently or simultaneously with telemetry and ranging signals.

3.2.3.2 Modulation Inputs


Each transmitter shall accept, independently or simultaneously:

• An external digital telemetry data stream from the Data Handling subsystem,

• One internal ranging modulation input signal from the associated receiver.

LISA Pathfinder


of 78



3.2.3.3 Transmit Frequency

3.2.3.3.1 Coherent Mode

TRAN-135/SRS-1717/T

In coherent mode, the transmit frequency shall be derived from the receive (uplink) frequency.

TRAN-136/SRS-1718/T

When in Coherent mode the frequency turn-around ratio shall be 749/880.

3.2.3.3.2 Non Coherent Mode

TRAN-138/CREATED/R

In non-coherent mode the transmit frequency shall be derived from an internal reference oscillator.

TRAN-139/SRS-624 & [AD 05]/R

The nominal transmit carrier frequency shall be selectable at the time of manufacture within the range 8450 to 8500 MHz.

TRAN-140/SRS-624 & [AD 05]/T

The nominal transmit carrier frequency for the Lisa Pathfinder downlink shall be 8495.000MHz TBC.

TRAN-141/[RD 96]/T

The transmitter carrier frequency shall be set within +/- 10kHz of the nominal transmit carrier frequency, at a temperature of 22°C ± 3°C.

TRAN-142/Derived from [RD 96] & GDI-32/T

The transmitter carrier frequency shall not vary by more than:

• ± 35kHz from the nominal transmit carrier frequency, including initial setting inaccuracies and for all variations due to the specified worst case environment over the design lifetime (excluding ageing drift)

• ± 15kHz relative to the initial setting, as a result of ageing during the design lifetime, after having been stored for a maximum of 1.5 years.

3.2.3.4 Modulated Spectrum and Spurious Outputs

TRAN-144/[STD 11]/T

When modulated or unmodulated, in both coherent and non-coherent mode, the transmitter output spectrum shall contain only the expected energy distribution and shall show no spurious outputs, including harmonics, higher than -60dBc (as defined in [STD 11]) in any 4kHz bandwidth with respect to the unmodulated carrier.

LISA Pathfinder


of 78



TRAN-145/CREATED/T

At the receiver operating frequency +/- 2MHz the permissable level of spurious and noise shall not exceed -99dBc in any 4kHz bandwidth.

TRAN-146/Derived from [RD 96]/T

When powered ON the transmitters shall not show any spurious output at the Transponder receiver input interface which could affect requirements TRAN-332, TRAN-333 and TRAN-334 (Section 5.2.3).

3.2.3.5 Residual Amplitude Modulation

TRAN-148/CREATED/T,R

The residual amplitude modulation of the phase-modulated carrier remaining at the transmitter output shall be less than 2%.

3.2.3.6 Carrier Phase Noise


The phase noise of the unmodulated downlink carrier at nominal transmit frequency shall not exceed 4° rms integrated between 10Hz and 100kHz.

This specification applies to both the coherent and the non-coherent modes of operation. In coherent mode the phase noise shall be met for all uplink signal powers from 15dB above its acquisition threshold to -50dBm.

3.2.3.7 Output VSWR

TRAN-152/[RD 96]/T,R

The transmit function shall meet all performance requirements specified herein with a nominal load VSWR (antenna interface) up to 1.5 at any phase angle.

TRAN-153/CREATED/T

The transmit function shall not be damaged, nor shall there be any spurious signals generated by applying any load from short circuit to open circuit at any phase angle (at the transponder interface). This shall apply during all environmental conditions, and in particular during pressure decrease.

3.2.3.8 Telemetry Modulation Performances

3.2.3.8.1 TM Interface

TRAN-156/Derived from SRS-627, SRS-628/R

The transmitter shall support at least 2 telemetry bit rates, selectable in-orbit, in the range 512s/s to 65.536ks/s.

LISA Pathfinder


of 78



TRAN-157/SRS-627, SRS-628/T,R

The high telemetry data rate for the Lisa Pathfinder downlink shall be 60ks/s.

TRAN-158/Derived From SRS-1244/T,R

The contingency low telemetry data rate for the Lisa Pathfinder downlink shall be 2ks/s.

TRAN-159/SRS-1720/T,R

The Telemetry mode (Low, High) shall be selectable by command from the DHS.

TRAN-160/Derived from [AD 05] & SRS-1245, SRS-627./T,R

The telemetry input signals shall be provided to a single Transmitter input as;

• NRZ-L PCM data, (for the low data rate)

• SP-L PCM data, (for the high data rate).

Note: the format used will vary depending on the phase of the mission.

TRAN-162/[AD 05]/T,R

The telemetry input signal provided to the Transponder as NRZ-L PCM data shall be BPSK modulated onto an 8kHz (TBC) sinusoidal subcarrier within the transmitter, prior to subsequent phase modulation of this subcarrier signal onto the downlink carrier, in accordance with the requirements of [STD 11].


The telemetry input signal provided to the transponder as SP-L PCM data shall be directly phase modulated onto the downlink carrier, in accordance with the requirements of [STD 11].

TRAN-164/GDI-539/T,R

The transponder telemetry input data interface shall be a digital RS-422 (DTM) data interface. The interface shall be implemented in accordance with Section 3.5.5.9.3 [AD 17].

TRAN-165/CREATED/R

The telemetry modulation (including subcarrier) shall be switchable ON/OFF in the transponder by means of a TM ON/OFF command.

3.2.3.8.2 Occupied Bandwidth

TRAN-167/[STD 11]/T,R

The occupied bandwidth shall be limited to be in accordance with the requirements of [STD 11].

LISA Pathfinder


of 78




Telemetry degradation due to filtering shall not exceed a reduction of the BER corresponding to 0.3dB reduction of the telemetry waveform.

3.2.3.8.3 TM Modulation Index.

TRAN-170/[STD 11]/T,R

The downlink TM modulation index shall be less than 1.5 rads.


The nominal TM modulation index for the Lisa Pathfinder downlink shall be 1.25 rads.


The variation of the TM modulation index over the acceptance temperature range shall be lower than ± 5%.

3.2.3.8.4 Clock timing


For applications where a subcarrier is employed in the telemetry channel, the Data and subcarrier shall be referenced to the clock in order to guarantee the phase stability requirements of [STD 11]. In particular this means:

• The transition in the PCM waveform shall coincide with a subcarrier zero crossing to within ± 2.5% of the subcarrier period.

• At each transition of the PCM waveform (NRZ-L), the subcarrier shall be reversed in phase.

• At all times, for more than 25% of a subcarrier period after a phase reversal, the phase of the modulated subcarrier shall be within ± 5° of that of a perfect PSK signal.

• For NRZ-L waveform, the beginning of the symbol intervals shall coincide with a positive-going subcarrier zero crossing for symbols “1” and with a negative-going zero crossing for symbols “0”.

3.2.3.9 RF Output Power

TRAN-176/[RD 45]/T

Each Transmitter chain shall provide two modes of operation:

• Low Power Mode

• High Power Mode

A single connector shall be provided for both modes.

LISA Pathfinder


of 78



TRAN-177/[RD 45]/R

The RF output power level at the internal transmitter output interface shall be:

• Low Power: 18.5dBm ± 3dB, selectable at time of manufacture, with a tolerance of +/- 0.5dB,

• High Power: 37dBm nominal with a tolerance of +/- 0.5dB.

TRAN-178/CREATED/T

The output power variation shall be less than 1.0dBpp relative to the nominal value (includes the tolerence stated in TRAN-177) under all conditions over any 10 seconds period and through the design lifetime.

3.2.3.10 RF Power Capability

TRAN-180/CREATED/R

The transponder shall allow RF transmission during the launch phase (if requested from a mission point of view) and shall not need to be switched off in order to avoid any damage to the subsystem.

3.2.3.11 Transmitter ON/OFF Switching

TRAN-182/SRS-1712/R

The transmitter shall be switchable ON/OFF by telecommand only.

TRAN-183/SRS-1712/R

The transmiter output to be enabled shall be switchable High Power Output/Low Power Output by telecommand only.

3.2.4 Ranging Requirements

TRAN-185/Derived from [STD 10]/R

The transponder ranging function shall be implemented in accordance to the ESA Ranging Standard [STD 10].

3.2.4.1 Ranging Input Signals

TRAN-187/SRS-1759/R

The uplink carrier shall be phase modulated by the ranging signal.

TRAN-188/CREATED/R

The RG signal will be a ranging tone (sinewave) which is PSK modulated by PCM data (ranging code). Detailed definition of the ranging function shall be as per ESA Ranging Standard [STD 10].

LISA Pathfinder


of 78




The ranging performance requirements shall be met for a total received uplink signal power level, modulated or not with telecommand signal, between -110dBm and -50dBm, referred to the internal transponder input interface.

TRAN-190/SRS-1762/T

The ranging performance shall be valid for RF carrier frequency offsets of at least ± 270kHz around the nominal RF carrier frequency.

3.2.4.2 Ranging Tone Frequency

There is intended to be only one ranging tone or tone plus code on the uplink and the downlink. The ranging tone frequency will be selected between 100kHz - 1.5MHz, taking into account possible interferences between the ranging channel and the telecommand and telemetry channels.

TRAN-193/[STD 10]/T

The ranging tone frequency shall be selectable in the range 100kHz - 1.5MHz.

TRAN-194/CREATED/T

The Transponder shall demonstrate full performance with a ranging tone at any frequency between 100kHz and 1.5MHz.

TRAN-195/[AD 05]/T

The nominal ranging tone frequency shall be = 240kHz (TBC).

3.2.4.3 Ranging Modulation Indices

TRAN-197/[STD 11]/R

The uplink Ranging Modulation Index shall be selectable at the time of manufacture in the range 0.1 to 1.4 rad.

TRAN-198/[AD 05]/T

The nominal Lisa Pathfinder uplink ranging modulation index shall be 0.7rad.

TRAN-199/[STD 11]/R

The downlink Ranging Modulation Index shall be selectable at the time of manufacture in the range 0.01 to 0.7 rad.

TRAN-200/[AD 05]/T

The nominal Lisa Pathfinder downlink ranging modulation index shall be 0.5rad.

LISA Pathfinder


of 78



TRAN-201/SRS-1767/T

The total downlink ranging modulation index accuracy shall be better than ± 10% (including initial setting) under all specified environmental, and uplink modulation index conditions.

3.2.4.4 Ranging Channel Group Delay Stability

TRAN-203/[STD 10]/T

The group delay of the TT&C ranging channel through the transponder shall be constant to within ± 30nsec within the ranging tone frequency range 100kHz to 1.5MHz from the residual carrier. This shall be met over the expected Doppler variation and over the specified range of input levels, temperatures and power supply during the complete mission duration.

3.2.4.5 Ranging Video AGC


The ranging channel video AGC function shall ensure that the downlink ranging channel modulation index is maintained within ± 10% over the range of total received uplink signal power level -110dBm to -50dBm.

TRAN-206/CREATED/T

The ranging channel video AGC time constant shall be in the range 10ms to 30ms.

3.2.4.6 Ranging Demodulation Performances


With a total received uplink signal power level in the range -110dBm to -50dBm at the internal Transponder input interface and an uplink TC modulation index of 1.25rad peak and ranging modulation index of 0.7rad peak, the signal to noise density ratio of the ranging video output (S/N0) shall be greater than 48dBHz.

S/No measurements shall be carried out at the ranging tone frequency.

TRAN-209/CREATED/T

Any discrete spurious or RF spectral component shall be at least 20dB below the ranging subcarrier level. This shall be met in the presence of interference as defined in this specification, when the total received uplink signal power level is between -50dBm and -110dBm.

TRAN-210/CREATED/T

The implementation loss of the ranging channel shall be 1.5dB, maximum.

LISA Pathfinder


of 78



3.2.4.7 Ranging Signal Polarity

TRAN-212/SRS-1769/T

A positive phase shift on the uplink shall give rise to a positive phase shift on the downlink.

3.2.4.8 Ranging ON/OFF Switching

TRAN-214/SRS-1771/T

The ranging modulation shall be switchable ON and OFF by separate telecommand.

3.2.4.9 Stability Requirement for Doppler Tracking

TRAN-216/SRS-1773/T

Coherent transponders used for Doppler tracking shall meet the phase-stability requirements (Allan Variance) of the ESA Ranging Standard, [STD 10]. The values are applicable to the complete link, from uplink reception to downlink transmission.

LISA Pathfinder


of 78



3.3 X-Band TT&C Command & Housekeeping

3.3.1 Receiver Housekeeping

3.3.1.1 AGC Telemetries


The receiver shall provide a telemetry output corresponding to a Coherent AGC as a function of the received carrier power level. The telemetry shall be such that by means of AGC calibration curves and temperature telemetry, the actual received carrier level can be determined within ± 3dB. During unit acceptance testing the calibration curves for Hot, Cold and Ambient temperatures shall be recorded covering the full specified input range (-116dBm to -50dBm), and relevant warning and danger limits shall be defined.


The receiver shall provide a telemetry output corresponding to a Non Coherent AGC as a function of the total received uplink signal power plus noise power in the receiver bandwidth. The telemetry shall be such that by means of AGC calibration curves and temperature telemetry, the actual input power level can be determined within ± 3dB. During unit acceptance testing the calibration curves for Hot, Cold and Ambient temperatures shall be recorded covering the full specified input range (-116dBm to -50dBm) and relevant warning and danger limits shall be defined.

3.3.1.2 SPE Telemetry


The receiver shall deliver a signal, which indicates the static phase error (SPE) of the receiver VCO. It shall be used as the transponder status signal but not for accurate frequency readings. Calibration curves for Hot, Cold and Ambient temperatures shall be recorded during the acceptance testing, including temperature variations.


The SPE shall operate over the frequency range specified in TRAN-94.

3.3.1.3 Lock Status


The receiver shall deliver a signal indicating that it is locked to the carrier.

LISA Pathfinder


of 78



3.3.1.4 Coherent / Non-Coherent Status


The receiver shall provide a signal of the status of the Coherent / Non-Coherent command.

3.3.1.5 Receiver Temperature

TRAN-230/Derived from SRS-475 /T,R

The receiver shall deliver a signal indicating its temperature close to the temperature reference point of the receiver. Temperature calibration curves shall be recorded during the acceptance testing and the relevant warning and danger limits shall be defined

3.3.2 Transmitter Housekeeping

3.3.2.1 Transmitter ON/OFF Telemetry


The transmitter shall provide a signal indicating the Transmitter ON/OFF status.

3.3.2.2 Output Power Telemetry


The transmitter shall provide a signal indicating the transmit output power level.

During unit acceptance testing the calibration curve shall be recorded and relevant warning and danger limits shall be defined.

3.3.2.3 Ranging On/Off Telemetry


The transponder shall provide a signal indicating the Ranging ON/OFF status.

3.3.2.4 Transmitter Temperature Telemetry


The transmitter shall provide a signal indicating its temperature close to the temperature reference point of the transmitter. Temperature calibration curves shall be recorded during the acceptance testing and the relevant warning and danger limits shall be defined.

3.3.2.5 Transmitter Hi/Low Power Mode Telemetry


The transponder shall provide a signal indicating the power mode (Hi / Low) status.

LISA Pathfinder


of 78



3.3.2.6 Modulation Selection Telemetry


The transponder shall provide a signal indicating the modulation type NRZ-L / SP-L status.

3.3.2.7 Modulation Telemetry


The transponder shall provide a signal indicating the modulation ON/OFF status.

3.3.3 List of High Power Commands

TRAN-247/CREATED/T

Each Transponder shall accept the following Standard High Power Commands (SHP).

• Transmitter ON SHP

• Transmitter OFF SHP

• Coherent Mode Select SHP

• Non-coherent Select SHP

• Ranging ON SHP

• Ranging OFF SHP

• High Power Mode Select SHP

• Low Power Mode Select SHP

• BPSK TM Mode Select SHP

• SP-L TM Mode Select SHP

• Modulation ON SHP

• Modulation OFF SHP

The detailed interface characteristics shall be in accordance to the SHP definition in [AD 17].

3.3.4 List of Housekeeping Signals


The Transponder shall provide the following housekeeping signals:

• Receiver Carrier Lock status RLS

• Static Phase Error (SPE) Analogue Acquisition (AN2)

• Coherent Automatic Gain Control (AGC) Analogue Acquisition (AN3)

• Non Coherent Automatic Gain Control (AGC) Analogue Acquisition (AN3)

LISA Pathfinder


of 78



• RX Temperature Temperature Acquisition (ANY)

• TX ON/OFF status Relay Status Acquisition (RSA)

• Coherent/Non-Coherent status Relay Status Acquisition (RSA)

• Ranging status Relay Status Acquisition (RSA)

• RF output power Analogue Acquisition (AN2)

• TX Temperature Temperature Acquisition (ANY)

• TX Hi/Low Mode Status Relay Status Acquisition (RSA)

• TX NRZ-L/SP-L Mode Status Relay Status Acquisition (RSA)

• Modulation Status Relay Status Acquisition (RSA)

The detailed interface characteristics shall be in accordance to the detailed definitions in [AD 17].

LISA Pathfinder


of 78



4. UNIT SPECIFIC DESIGN AND INTERFACE REQUIREMENTS

Note, that further requirements are defined in the Product Assurance (PA) [AD 10] requirements made applicable by the Statement of Work (SOW) to the subcontractors.

TRAN-252/CREATED/R

The General Design and Interface Requirements (GDIR) [AD 17] are applicable as defined in the GDIR applicability Matrix of Section 6. .

4.1 Mechanical Requirements

Note: It is preferred that the Transponder and Diplexer should be delivered as an integrated set. Where this is done, volume and mass allocations for each element may be combined.

TRAN-255/[AD 17]/R

The Transponder shall comply to the Mechanical design requirements of [AD 17]. See details in GDIR Applicability Matrix Section 6. .

4.1.1 Mass

TRAN-257/[RD 39]/T

The mass of one Transponder (i.e. Transmitter and Receiver) shall be less than 3.0kg.

4.1.2 Envelope

TRAN-259/CREATED/R

The dimensions of each Transponder (i.e. Transmitter and Receiver) housing including mounting feet and connectors shall not exceed:

• 270mm; 200mm; 200mm [length; width; height]

4.1.3 Mounting

TRAN-261/CREATED/R

The Transponder will be mounted directly to the SCM CFRP shear walls. The mechanical environments specified in [AD 17] pertaining to CFRP and shear wall mounted units shall be applicable.

LISA Pathfinder


of 78



4.2 Electrical Requirements

TRAN-263/[AD 17]/R

The Transponder shall comply to the Electrical design requirements of [AD 17]. See details in GDIR Applicability Matrix Section 6. .

This equipment is considered a "Platform" equipment for all electrical purposes.

4.2.1 Power Consumption

TRAN-266/[RD 39]/T

The maximum power consumption of each Transponder shall be:

• 6W for one Receiver

• 30W for one Transmitter

• 36W Total.

4.2.2 Power Interfaces


Each Transponder shall have two DC/DC converters, one for the Receiver and one for the Transmitter


Each Transponder shall receive regulated primary power for its Receiver from one FCL interface provided by the PCDU.

TRAN-270/GDI-352/T,A

The contractor shall design his part of the FCL interface to be compliant to the interface characteristics defined in [AD 17].

TRAN-271/CREATED/T

Each Transponder shall receive regulated primary power for its Transmitter via one LCL interface provided by the PCDU.

TRAN-272/GDI-349/T,A

The contractor shall design his part of the LCL interface to be compliant to the interface characteristics defined in [AD 17].

LISA Pathfinder


of 78



4.2.3 RF Interfaces

TRAN-274/CREATED/R

The Transponder shall provide RF interfaces of SMA type female.

4.2.4 Housekeeping Command & Telemetry Interfaces

TRAN-276/GDI-1205, GDI-1210, GDI-1211/T,A

The Housekeeping command & control interfaces shall comply with the requirements defined in [AD 17].

TRAN-277/GDI-497/R

All Standard High Power Commands (SHP) interfaces shall comply with the requirements defined in [AD 17].

4.2.5 X-Band Digital TC Channel Interface (XTC)

TRAN-279/GDI-527/R

The X-Band Digital TC Channel output interface shall consist of 3 signals (For these signals the following abbreviations shall be used):

• Data (DCD)

• Clock (DCC)

• Data Valid (DCE) [Enable/Channel Active]

TRAN-280/GDI-527, GDI-1283/R

The contractor shall design his part of the interface to be compliant to the XTC requirements defined in [AD 17].

4.2.6 X-Band Digital TM Channel Interface (XTM)

TRAN-282/GDI-538/R

The X-Band Digital TM Channel shall consist of 2 signals. (For these signals the following abbreviations shall be used):

• Data (DMD)

• Clock (DMC)

TRAN-283/GDI-538, GDI-539/T,R

The contractor shall design his part of the interface to be compliant to the XTM requirements defined in [AD 17].

LISA Pathfinder


of 78



4.2.7 X-Band Receiver Lock Status Interface (RLS)

The Receiver Lock Status Signal is issued by the X-Band Transponder and will be acquired by the OBC.

TRAN-286/GDI-538, GDI-539/T,R

The contractor shall design his part of the interface to be compliant to the RLS requirements defined in [AD 17].

4.2.8 Software Data Interfaces

TRAN-288/GDI-2024/R

Any PROM shall be accessible and removeable after the unit has been integrated to the spacecraft without the need to de-integrate the unit from the spacecraft.

4.3 Thermal Requirements

TRAN-290/[AD 17]/R

The Transponder shall comply to the Thermal design requirements of [AD 17]. See details in GDIR Applicability Matrix Section 6.

4.4 Magnetic Moment Requirements

TRAN-292/[AD 17]/R

The Transponder shall comply to the Magnetic Moment design requirements of [AD 17]. See details in GDIR Applicability Matrix Section 6. .

TRAN-293/Derived from [RD 33]/R

Tight control over DC and AC magnetic and electric fields at the experiments is essential for the successful achievement of the mission objectives. Critical frequencies span the range .01 milliHz to 10 kHz. Rigorous, documented application of good design practices shall be employed to minimize unit-generated fields at the experiments including careful frequency planning and design analysis to eradicate the generation of spurious frequencies in the bands of interest. Fields, field gradients and fluctuation of fields over time are all important parameters. It is important that frequencies not required for system level use are not allowed to radiate or conduct from the Transponder to avoid the risk of beat frequencies being generated with other signals.

For magnetic fields good design practices include employing minimum currents and loop areas on circuit boards and in wiring, including the use of twisted pairs as appropriate. Strict avoidance of all magnetic materials is essential except where required for correct functioning of the unit. All potential applications of such materials shall be reported to prime before use.

LISA Pathfinder


of 78



For electric field reduction, the minimization of voltages, close proximity of live and return wires and employment of good shielding practices at board level, unit level and in wiring shall all be employed.

TRAN-294/Derived from [RD 33]/T,A

The magnetic moment of the Transponder equipment shall be less than 100mAm2 (magnitude) for each Transponder. The analysed or tested magnetic moment shall be given as vector (Mx, My, Mz) in the unit coordinates x, y, z.


The magnetic moment of the Diplexer equipment shall be less than 75mAm2 (magnitude) for each Diplexer. The analysed or tested magnetic moment shall be given as vector (Mx, My, Mz) in the unit coordinates x, y, z.


Stability of magnetic field and magnetic field gradient to within 0.5%/sqrt(Hz) must be demonstrated.


Measurements of stability shall be made over a 10,000 second period.


The above requirements shall be met in all modes of operation although the stability requirements only apply during measurement modes of the experiments.


Magnetic measurements shall be made in a appropriately compensated facility to ensure that effects due to the Earth's field are negated.


To ensure that sufficient information is available for the spacecraft magnetic model, measurements shall be made of the magnetic field at various positions relative to the test item. These may comprise a series of measurements at a fixed distance from the unit and at equal angles to cover a complete revolution around the item; alternatively measurements may be made at several distances from each face of the item, a suggested minimum set of such measurement ranges being 0.1, 0.3, 0.5 and 1 metre, although the calculation of magnetic moment could be based solely on the 1 metre measurements. The proposed method must be agreed by prime in advance to ensure that sufficient data is provided for the overall spacecraft analysis.

LISA Pathfinder


of 78




An analysis shall be performed to predict the levels of DC and AC magnetic fields from the Transponder, at a distance of 0.5m from the unit's geometric centre ( i.e. at the experiment test masses) with appropriate use of testing to identify or confirm the results.

Table 4.4-1 gives specific requirements for DC and AC magnetic fields from the Transponder.

Other measurement distances are acceptable providing the results can be shown to be correctable to a distance of 0.5m.

Parameter Value DC Magnetic Field Meeting the dc magnetic field requirements shall be

achieved by compliance with the magnetic moment requirement for the unit of not greater than 100mAm^2, which shall be measured as detailed above.

DC Magnetic Field Gradient

Meeting the dc magnetic field gradient requirements shall be achieved by compliance with the magnetic moment requirement for the unit of not greater than 100mAm^2, which shall be measured as detailed above.

AC Magnetic Field For frequencies below 10 kHz the magnitude of a high frequency magnetic field shall be less than 100nT at 0.5 metres from the field generator. This is in addition to the field stability requirement detailed above.

AC Magnetic Field Gradient

For frequencies below 10kHz the magnitude of a high frequency magnetic field gradient shall be less than 675 nT/m at 0.5metres from the field generator This is in addition to the field gradient stability requirement detailed above.

Table 4.4-1: DC/AC Magnetic Field Requirements

4.5 Gravitational Requirements

TRAN-304/[AD 17]/R

The Transponder shall comply to the Gravitational design requirements of [AD 17]. See details in GDIR Applicability Matrix Section 6. .

TRAN-305/Derived from GDI-2043/R

In order to model the gravitational field of the Transponder a FEM mass model of all the components of the unit shall be provided in accordance with [AD 17] Section 3.2.4.

LISA Pathfinder


of 78



5. DIPLEXER REQUIREMENTS

5.1 Functional Requirements

TRAN-308/CREATED/R

The Diplexer shall transfer the X-Band uplink signals received by the spacecraft antennas to an X-Band telecommand/ranging receiver.

TRAN-309/CREATED/R

The Diplexer shall transfer the X-Band transmit output to the spacecraft antennas.

TRAN-310/CREATED/T

The Diplexer shall permit simultaneous operation of the receiver and transmitter equipment functions without mutual signal interference, degradation of performance or damage (See Figure 1.4-1).

TRAN-311/[RD 45]/T

The RF transmit insertion loss of the Diplexer shall be < 1.13dB.

TRAN-312/[RD 45]/T

The RF receive insertion loss of the Diplexer shall be < 0.5dB.

TRAN-313/CREATED/R

The Diplexer shall be compatible with the requirements of [STD 11].

5.2 Frequencies

5.2.1 Passband Frequencies

TRAN-316/Derived from [RD 96] & [RD 97]/T,R

The Diplexer shall operate with a receive frequency of +/- 655kHz about a nominal value (ftone) in the range 7190MHz to 7235MHz, and a transmit frequency band of +/- 1.2MHz about a nominal value in the range 8450MHz to 8500MHz. The Diplexer operating frequencies shall have a transmit/receive ratio of 880/749 and shall be selectable at time of manufacture.

5.2.2 Rejection Frequencies

TRAN-318/CREATED/R

The diplexer rejection requirements shall be defined by the Transponder/Diplexer supplier and shall be consistent with the combined design meeting the stated receiver and transmitter performance requirements contained within this specification.

LISA Pathfinder


of 78




In particular, the Diplexer shall meet the following individual rejection requirements of Table 5.2-1.

Frequency Rejection (dB)

Transmit Path Rejection Receive Frequency Band: 7228.4034 to 7232.4034MHz

Consistent with meeting TRAN-98 & TRAN-99

Other receiver critical frequencies Consistent with meeting TRAN-97

Tx Harmonic Consistent with meeting Section 5.2.3

Other Frequencies (TBC) Consistent with meeting Section 5.2.3

Receive Path Rejection

Transmit Frequency Rejection Consistent with meeting TRAN-1103

Launcher transmit frequencies Consistent with meeting TRAN-1102

Launcher receiver frequencies Consistent with meeting TRAN-1100.

Other receiver critical frequencies Consistent with meeting Section 5.2.4.

Table 5.2-1: Diplexer Rejection Characteristics

5.2.3 Spurious Transmit Outputs

TRAN-322/[STD 11]/A,R

The power level of all spurious signals, excluding harmonics, generated by the Transponder/Diplexer assembly under the maximum output power conditions shall not exceed the values defined in Table 5.2-2 in a measurement bandwidth of 4kHz when measured at the Diplexer to Antenna interface.

Frequency Range (MHz) Maximum Spurious Level

100 to 7228.4034 -60dBc 7228.4034 to

7232.4034 Consistent with meeting TRAN-98

& TRAN-99 7232.4034 to 40,500 -60dBc

Table 5.2-2: Spurious Output Levels

TRAN-324/CREATED/A,R

The out-of-band spurious emissions generated by the X-Band Transponder/Diplexer assembly shall not exceed the levels in the Radio Astronomy and Deep Space Receiver notches as given in Table 5.2-3, Table 5.2-4 and Table 5.2-5 when measured at the Diplexer to Antenna interface.

LISA Pathfinder


of 78



Centre Frequency

(MHz)

Assumed Observation

Bandwidth Spectral Line (KHz)

Power Spectral Density (dBc/Hz)

327 10 -60.0 1420 20 -67.8 1665 20 -67.2 4830 50 -69.4

14500 150 -70.0 22200 250 -68.7 23700 250 -68.2 43000 500 -68.4 48000 500 -68.4 88600 1000 -68.7 98000 1000 -68.6 115000 1000 -68.0

Table 5.2-3: Radio Frequency (Narrowband spectral) Receiver Notches

Centre Frequency

(MHz)

Assumed Observation

Bandwidth Spectral Line (KHz)

Power Spectral Density (dBc/Hz)

13.385 0.05 -36.3 25.610 0.12 -42.9 73.8 1.60 -61.1

151.525 2.95 -68.4 325.3 6.60 -74.0 408.05 3.90 -73.0

611 6 -74.5 1413.5 27 -83.7 1665 10 -81.2 2695 10 -81.4 4995 10 -80.7

10650 100 -86.3 15375 50 -82.5 23800 400 -86.3 31550 500 -83.7 43000 1000 -85.4 89000 6000 -86.7 110500 11000 -88.6

Table 5.2-4: Radio Frequency (Wideband continuum) Receiver Notches

Frequency Band Power Spectral Density (dBc/Hz)

2290MHz – 2300MHz -90.0 8400MHz – 8450MHz -99.3 31.8GHz – 32.3GHz -106.9 37.0GHz – 38.0GHz -108.2

Table 5.2-5: Deep Space Receiver Notches

LISA Pathfinder


of 78



5.2.4 Receiver Spurious Responses


The receiver shall not exhibit false lock or degradation of Bit Error Rate in the presence of an unwanted input signal at the receiver image response frequencies of level upto -50dBm.


The receiver shall not exhibit false lock or degradation of Bit Error Rate in the presence of an unwanted input signal at all other receiver input frequencies of level upto -50dBm.

TRAN-331/CREATED/R

In the presence of an interference signal, as defined in Table 5.2-4, at the diplexer antenna interface, the following requirements TRAN-332, TRAN-333, TRAN-334 and TRAN-335 shall be fulfilled.


When the receiver is unlocked, it shall be free from any performance degradations and all indications of false lock, frequency pushing, self lock or instability, independent of whether the associated transmitter is powered ON or OFF.


When the receiver is locked, it shall be free from any performance degradations and all indications of instability, independent of whether the associated transmitter is powered ON or OFF.


The Ranging Channel output shall not be degraded by spurious/harmonics greater than -20dBc.

TRAN-335/CREATED/T

The receiver performance of the Transponder/Diplexer assembly shall not be susceptible to (or suffer unacceptable performance degradation) when Narrowband (NB) disturbances according to Table 5.2-6 below are injected into the receive path at the antenna port of the diplexer, with Fo being the nominal receiver rest frequency and linear interpolation to be performed between the frequency steps.

Lisa Pathfinder X-Band Tx Frequency - 8450 to 8500MHz (8495.000MHz) at 40dBm.

LISA Pathfinder


of 78



13 kHz to Fo-200MHz 0dBm

Fo-200MHz to Fo-10MHz decreasing from -60dBm to -100dBm

Fo-10MHz to Fo-2MHz decreasing from -100dBm to -125dBm

Fo +/- 2MHz -125dBm

Fo+2MHz to Fo+10MHz increasing from -125dBm to -100dBm

Fo +10MHz to Fo+200MHz increasing from -100dBm to -60dBm

Fo +200MHz to 25 GHz 0dBm

Table 5.2-6: Narrowband Disturbances

5.3 Power Handling

TRAN-338/CREATED/T

The Diplexer shall support a nominal RF power at the transmit frequency of 37dBm with a margin of at least 6dB relative to the onset of multipaction.


The Diplexer shall not be damaged during corona test when fed with 8W at the transmit frequencies, the antenna port being terminated with a load of VSWR = 9:1 any phase.

5.4 Impedance

TRAN-341/Derived from [RD 96]/T,R

Input and output impedances of the diplexer within the above specified bands and for the specified frequencies shall be nominally 50Ω with a max VSWR of 1.2 (return loss of 20dB).

5.5 Mass

TRAN-343/[RD 39]/T

The mass of one Diplexer shall be less than 400g.

5.6 Envelope

TRAN-345/CREATED/R

The dimensions of each Diplexer housing including mounting feet and connectors shall not exceed:

• 270mm; 90mm; 90mm [length; width; height]

LISA Pathfinder


of 78



6. GDIR APPLICABILITY MATRIX

The following table lists the applicable requirements of the GDIR.

It contains, in the first column, the Local ID for each applicable GDIR requirement number.

The second column contains the GDIR Requirement number and the opening text of the requirement.

The third column defines the Applicability Y/N

The final column shows the intended verification method.

Req No. Reference Applicability Verif. Method

3 General Design and interface Requirements 3.1 General Design Requirements 3.1.1 Lifetime

TRAN-351 GDI-31: The on-ground lifetime of flight hardware is defin ...

Y R

TRAN-352 GDI-32: The Unit shall meet the requirements of this speci ...

Y A,R

TRAN-353 GDI-33: The in-orbit lifetime of the satellite is defined ...

Y R

TRAN-354 GDI-34: The unit shall be designed with positive margins o ...

Y A,R

TRAN-355 GDI-35: Maintenance during storage shall be as limited as ...

Y R

3.1.2 Design Safety

TRAN-357 GDI-37: The unit shall be designed and fabricated with com ...

Y A

TRAN-358 GDI-38: General safety requirements for units are as follo ...

Y A

3.1.3 Venting

TRAN-360 GDI-41: The unit shall be able to operate within a pressur ...

Y A,R

TRAN-361 GDI-43: Unless a cavity is hermetically sealed adequate me ...

Y R

TRAN-362 GDI-44: Structural members (honeycomb panels, in particula ...

Y T,A

3.1.4 Interchangeability

TRAN-364 GDI-46: All spacecraft units of the same part or configura ...

Y R

3.1.5 Identification & Marking

TRAN-366 GDI-50: For the particular case of connector identificatio ...

Y I

3.1.6 Accessibility/Maintainability

LISA Pathfinder


of 78




TRAN-368 GDI-52: The design of the unit, the position of the connec ...

Y R

TRAN-369 GDI-53: The equipment shall be designed to require a minim ...

Y R

TRAN-370 GDI-54: No field maintenance, servicing or adjustment shal ...

Y R

3.1.7 Transportation, Handling and Storage 3.1.7.1 Thermally Conductive Materials

TRAN-373 GDI-70: Unless justified and agreed beforehand, any therma ...

Y I,R

3.1.7.2 Magnetic Materials 3.1.7.3 Seals

TRAN-376 GDI-75: Any seals used shall comply with all the applicabl ...

Y R

TRAN-377 GDI-76: Any seals requiring periodic replacement during gr ...

Y R

3.1.7.4 Lubricants and Sealants

TRAN-379 GDI-78: No lubricants shall be used without the prior writ ...

Y R

3.1.7.5 Screw Locking

TRAN-381 GDI-80: All fasteners used on the unit shall be locked by ...

Y I,R

3.2 Mechanical Design and Interface Requirements

TRAN-383 GDI-82: All drawings, specifications and engineering data ...

Y R

TRAN-384 GDI-83: Units shall be compatible with mechanical testing. ...

Y R

TRAN-385 GDI-84: Following testing the unit shall be inspected to c ...

Y I

TRAN-386 GDI-87: No unit shall generate microvibration loads at its ...

Y A,R

3.2.1 Structural Design 3.2.1.1 General Requirements

TRAN-389 GDI-91: The following failure modes, for units at all leve ...

Y A

TRAN-390 GDI-92: The unit shall be designed to withstand the enviro ...

Y A,R

TRAN-391 GDI-93: For sine and random vibrations, the mechanical siz ...

Y A

LISA Pathfinder


of 78




TRAN-392 GDI-94: Wherever practical a fail safe design based on red ...

Y A

TRAN-393 GDI-95: In cases where a failsafe design cannot be impleme ...

Y A

TRAN-394 GDI-2045: All potential fracture critical items shall be sub ...

Y A

3.2.1.2 Mass properties

TRAN-396 GDI-98: All mass estimations shall be accompanied by the d ...

Y T

TRAN-397 GDI-100: The mass of an item must be measured with the foll ...

Y T

3.2.1.3 Centre of Gravity and Moment of Inertia

TRAN-399 GDI-102: All COG and MOI estimates shall be accompanied by ...

Y A

TRAN-400 GDI-104: The unit centre of gravity shall be determined wit ...

Y T,A

TRAN-401 GDI-105: The unit moment of inertia shall be determined wit ...

Y A

3.2.1.4 Stiffness requirement

TRAN-403 GDI-113: Unless otherwise specified, units shall have their ...

Y T,A

TRAN-404 GDI-114: The stiffness requirements shall be demonstrated t ...

Y T,A

3.2.1.5 Strength Requirements 3.2.1.5.1 Definitions and General Requirements

TRAN-407 GDI-117: The design load factor philosophy of the LISA PF s ...

Y A

TRAN-408 GDI-2077: LPF mechanical testing shall take into account an ...

Y T

TRAN-409 GDI-2076: LPF mechanical testing shall take into account a Q ...

Y T,A

TRAN-410 GDI-2057: An additional Protoflight Factor of Safety, FOSPF ...

Y T,A

TRAN-411 GDI-129: The units shall be designed with positive margins ...

Y A

TRAN-412 GDI-130: The design loads for the structure elements are to ...

Y A

TRAN-413 GDI-131: The internal loads (thermo elastic, pre-stressed m ...

Y A

LISA Pathfinder


of 78




TRAN-414 GDI-132: For the computation of the design loads the maximu ...

Y A

3.2.1.5.2 Margin Of Safety & Safety Factors

TRAN-416 GDI-2121: For all Lisa-Pathfinder elements the design factor ...

Y A

TRAN-417 GDI-2120: Where design loads are generated using FE analyses ...

Y A

TRAN-418 GDI-136: The LPF hardware shall be able to withstand, witho ...

Y A,R

TRAN-419 GDI-137: All mechanical elements shall demonstrate positive ...

Y T,R

TRAN-420 GDI-147: The margins of safety for all elements of the unit ...

Y A

TRAN-421 GDI-148: All bolts shall be sized to prevent sliding under ...

Y A

TRAN-422 GDI-149: Wherever applicable, rules for general design of b ...

Y R

TRAN-423 GDI-150: In addition, in case of combined loads due to ther ...

Y A

TRAN-424 GDI-153: Method for evaluation of dimensioning loads/stress ...

Y A

3.2.2 Design Requirements 3.2.2.1 Attachment Requirements

TRAN-427 GDI-160: For the preliminary determination of the requested ...

Y A

TRAN-428 GDI-161: The attachment points shall provide a controlled s ...

Y I,R

TRAN-429 GDI-162: The interface plane flatness of a unit shall be be ...

Y I

TRAN-430 GDI-163: The mechanical mounting interface shall be consist ...

Y R

TRAN-431 GDI-164: The unit bolts type and number shall be defined to ...

Y R

TRAN-432 GDI-165: Unless otherwise specified all units shall be thro ...

Y I,R

TRAN-433 GDI-2132: To minimise CoG uncertainty of the unit when mount ...

Y I,R

TRAN-434 GDI-167: Thermally dissipative units shall have proper prov ...

Y I,R

LISA Pathfinder


of 78




TRAN-435 GDI-168: Unless special conditions override, the thickness ...

Y I,R

TRAN-436 GDI-169: For the unit mounting, provision shall be made for ...

Y I,R

TRAN-437 GDI-2123: Unit Lug/Hole Design Requirements: Unit mounting h ...

Y I,R

TRAN-438 GDI-170: Sufficient clearance shall be allowed between mech ...

Y I,R

TRAN-439 GDI-171: Fasteners shall be verified similarly to other str ...

Y A

TRAN-440 GDI-173: Fasteners shall be procured and tested according t ...

Y I

TRAN-441 GDI-174: The Flight equipment shall be able to survive:- · ...

Y A

3.2.3 Mechanical / Optical Interface Control Documents

TRAN-443 GDI-183: The mechanical and optical configuration and its i ...

Y A

TRAN-444 GDI-184: Interfaces will be subjected to a formal inspectio ...

Y T,I

TRAN-445 GDI-185: The issues of ICDs have to be released as defined ...

Y A

TRAN-446 GDI-186: One of the attachment holes on a unit shall be spe ...

Y R

TRAN-447 GDI-187: The unit reference frame shall have its origin at ...

Y R

TRAN-448 GDI-190: The dimensioning of the attachment hole pattern sh ...

Y A

TRAN-449 GDI-191: Interface Control Drawings shall be provided to th ...

Y R

3.2.4 Mechanical Mathematical Model Requirements

TRAN-451 GDI-197: Finite elements models shall be provided for all i ...

Y A

TRAN-452 GDI-2075: The use of duplicate element numbers for elements ...

Y R

3.2.4.1 Software/Electronic Files Delivery

TRAN-454 GDI-200: The model shall be prepared using NASTRAN Software ...

Y R

LISA Pathfinder


of 78




TRAN-455 GDI-201: Finite elements models shall be provided for all u ...

Y R

TRAN-456 GDI-202: For the FEM delivery, the following list of inform ...

Y R

3.2.4.2 Units

TRAN-458 GDI-204: S.I. units are to be used: · Newton (N) for force ...

Y R

3.2.4.3 Coordinate system

TRAN-460 GDI-206: The FEM shall use the Units/assembly Reference Fra ...

Y R

3.2.4.4 Model Identity/Comment

TRAN-462 GDI-208: The model name, issue and date must be included at ...

Y R

TRAN-463 GDI-209: The model description shall refer to a configured ...

Y R

TRAN-464 GDI-210: The following comment cards must be included in th ...

Y R

3.2.4.5 Model Size and Identification Numbering

TRAN-466 GDI-212: Numbering of BULK data cards: Each Nastran BULK ca ...

Y R

TRAN-467 GDI-213: Excluded BULK data cards: All data cards used to d ...

Y R

TRAN-468 GDI-214: The authorised NASTRAN elements are the following: ...

Y R

TRAN-469 GDI-215: The use of MSG-MESH data cards is prohibited. A pu ...

Y R

TRAN-470 GDI-216: Structural and equipment masses: For the structura ...

Y R

TRAN-471 GDI-217: When necessary, equipments may be represented by C ...

Y R

3.2.4.6 FEM Checks 3.2.4.6.1 Mass Distribution Check

TRAN-474 GDI-221: The outputs of the NASTRAN “Grid Point Weight Gene ...

Y A

3.2.4.6.2 Strain Energy and Max Ratio Check

LISA Pathfinder


of 78




TRAN-476 GDI-223: Strain energy and stiffness maxratio are requested ...

Y A

3.2.4.6.3 Conditioning Checking

TRAN-478 GDI-225: The purpose of the conditioning check is to identi ...

Y A

3.2.4.6.4 Constraint Check

TRAN-480 GDI-227: The purpose of the constraint check is to verify t ...

Y R

3.2.4.6.5 "Free-Free" Check.

TRAN-482 GDI-229: The purpose of the "Free-Free" check is to verify ...

Y R

3.2.4.6.6 Static Load Check

TRAN-484 GDI-231: The purpose of the static load check is to confirm ...

Y R

3.2.4.6.7 "Zero" Stress Thermo-elastic Check

TRAN-486 GDI-233: The purpose of the "Zero" stress check is to verif ...

Y R

3.2.4.7 FEM correlation.

TRAN-488 GDI-235: Full finite element models shall be updated as nec ...

Y T,A

TRAN-489 GDI-2102: For modes with effective masses > 10% of the total ...

Y T,A

TRAN-490 GDI-2101: Damping shall take measured values as input for th ...

Y R

TRAN-491 GDI-2100: The cross-orthogonality checks shall comply with; ...

Y T,A

TRAN-492 GDI-2097: For fundamental modes, (lowest frequency mode with ...

Y T,A

TRAN-493 GDI-2098: For modes with effective masses >10%of the total m ...

Y T,A

TRAN-494 GDI-2096: The difference between the Centre of Gravity posit ...

Y T,A

TRAN-495 GDI-2095: The mass difference between the measured and FEM f ...

Y T,A

3.2.5 Gravitational Mathematical Model Requirements

TRAN-497 GDI-2043: For gravitational modelling purposes, the mass dis ...

Y A,R

3.3 Thermal Design and Interface Requirements 3.3.1 Definition of Temperatures and Terms

LISA Pathfinder


of 78




3.3.1.1 Radiatively Controlled Unit

TRAN-501 GDI-239: In the frame of LISA Pathfinder, all units with th ...

Y R

3.3.1.2 Conductively Controlled Unit

TRAN-503 GDI-241: All units with a power density on the total skin h ...

Y R

3.3.1.3 Isothermal Unit

TRAN-505 GDI-243: As far as possible thermal gradients across the ba ...

Y R

TRAN-506 GDI-244: For radiative units the temperature difference bet ...

Y R

TRAN-507 GDI-245: For conductive units the temperature difference be ...

Y R

TRAN-508 GDI-246: For non-isothermal units a reference temperature s ...

Y R

3.3.1.4 Temperature Reference Point (TRP)

TRAN-510 GDI-248: The temperature reference point (TRP) shall be sel ...

Y R

3.3.2 Thermal Interface Requirements 3.3.2.1 Conductive Interface

TRAN-513 GDI-252: The mounting interface shall comply with the mecha ...

Y A

TRAN-514 GDI-253: Unit mounting areas shall not be painted or anodis ...

Y R

TRAN-515 GDI-254: All units shall have a smooth and plane baseplate ...

Y R

TRAN-516 GDI-255: Local heat flux shall not be greater than 1.5x spe ...

Y A

3.3.2.2 Radiative Interface

TRAN-518 GDI-258: Units shall be designed with an emittance > 0.8 (b ...

Y R

3.3.2.3 Internal Temperature Monitoring

TRAN-520 GDI-260: Temperature monitoring of selected points within a ...

Y R

TRAN-521 GDI-261: The location, type and electrical interface of all ...

Y R

3.3.3 Thermal Design Requirements

TRAN-523 GDI-263: The units shall be designed such that all internal ...

Y A

LISA Pathfinder


of 78




TRAN-524 GDI-264: Hot spots on the external surface of the unit are ...

Y A,R

TRAN-525 GDI-2079: Average dissipation of the unit operating with sta ...

Y A,R

3.3.4 Thermal Control

TRAN-527 GDI-267: All thermal hardware mounted on the unit shall be ...

Y R

3.3.5 Thermal Interface Control Documents

TRAN-529 GDI-269: All unit thermal interfaces shall be described wit ...

Y R

3.3.6 Thermal Mathematical Model Requirements 3.3.6.1 Thermal Interface Modeling

TRAN-532 GDI-2091: The use of the ESARAD and ESATAN software packages ...

Y A,R

TRAN-533 GDI-272: The Thermal mathematical model shall be provided f ...

Y A

TRAN-534 GDI-273: Units: All units used in thermal models (geometric ...

Y A

3.3.6.2 Thermal Model Correlation

TRAN-536 GDI-275: The detailed thermal model of a unit shall be veri ...

Y T,A

3.3.6.3 Reduced Thermal Model

TRAN-538 GDI-277: The consistency between reduced and detailed therm ...

Y A

TRAN-539 GDI-278: The convergence of the thermal models shall be dem ...

Y A

3.5 Electrical Design and Interface Requirements 3.5.1 General Requirements

TRAN-542 GDI-308: All electrical performances are specified under Wo ...

Y R

TRAN-543 GDI-309: Beginning-Of-Life criteria shall be derived by the ...

Y R

TRAN-544 GDI-2024: All PROM's shall be accessible and removeable afte ...

Y R

3.5.2 Power Interface Requirements (LC & FC)

TRAN-546 GDI-2046: The design of all essential loads (i.e those suppl ...

Y A,R

3.5.2.1 Sunlight Regulated Power Requirements

LISA Pathfinder


of 78




TRAN-548 GDI-338: All units connected to the sunlight regulated bus ...

Y T,A

TRAN-549 GDI-2104: The spacecraft sunlight regulated bus shall have a ...

Y T,R

TRAN-550 GDI-2103: For load changes of up to 50% of the nominal load ...

Y T,R

TRAN-551 GDI-2133: The bus voltage shall remain within 5% of its nomi ...

Y T,R

TRAN-552 GDI-339: If undervoltage protection is implemented by the l ...

Y T

TRAN-553 GDI-340: In case of an inductive load, when considering the ...

Y T,A

TRAN-554 GDI-341: The load shall not be irreversibly degraded for an ...

Y R

TRAN-555 GDI-342: No fuse protection shall be implemented. ...

Y R

TRAN-556 GDI-343: Primary current protection shall not be implemente ...

Y R

TRAN-557 GDI-344: The contractor shall design the load side of the L ...

Y T,R

TRAN-558 GDI-346: All power converters shall be designed to allow op ...

Y T

TRAN-559 GDI-347: The free-running frequency shall be limited to ±10 ...

Y T

TRAN-560 GDI-348: The as designed free-running frequency and frequen ...

Y T

TRAN-561 GDI-349: Units connected to LCL's or FCL's shall be designe ...

Y A

TRAN-562 GDI-352: The contractor shall design his side of the Regula ...

Y T,R

TRAN-563 GDI-354: Following switch-ON, and during input filter charg ...

Y T,R

3.5.2.2 Power Consumption Requirements

TRAN-565 GDI-361: The compliance versus the power allocations shall ...

Y T,A

TRAN-566 GDI-362: For each power interface circuit, the following co ...

Y T,A

TRAN-567 GDI-363: A power consumption test shall be required at temp ...

Y T,R

LISA Pathfinder


of 78




TRAN-568 GDI-2262: Each spacecraft element shall have included a powe ...

Y A

3.5.2.3 Tolerance to Power Bus Failures

TRAN-570 GDI-365: When a unit is internally redundant, and the suppl ...

Y T,A

3.5.2.4 Initial Electrical Status

TRAN-572 GDI-367: Upon application of power in nominal conditions al ...

Y T

3.5.3 Standard Signals 3.5.3.1 General Conventions

TRAN-575 GDI-378: Specified driver (or source) characteristics shall ...

Y R

TRAN-576 GDI-379: All data and signal interface drivers shall surviv ...

Y T,A

TRAN-577 GDI-380: The unit shall tolerate active signal I/Fs when un ...

Y T,A

TRAN-578 GDI-381: In case the electrical architecture does foresee c ...

Y T,R

TRAN-579 GDI-382: In case no load is specified, the characteristics ...

Y R

3.5.3.2 Harness Capacitance

TRAN-581 GDI-391: Interface signal drivers shall consider the capaci ...

Y A

3.5.4 Connectors General Design Requirements 3.5.4.1 Harness

TRAN-584 GDI-395: Cables falling into different EMC classifications ...

Y I,R

TRAN-585 GDI-396: All cable bundles shall be routed as close as poss ...

Y I,R

TRAN-586 GDI-397: In wiring through connectors all leads shall be ke ...

Y I,R

TRAN-587 GDI-398: The DC resistance between the single cable shield ...

Y T

TRAN-588 GDI-399: The structure termination of shields shall be made ...

Y I,R

3.5.4.2 Connector Types

TRAN-590 GDI-401: All connectors mounted on units shall be D*MA** co ...

Y R

TRAN-591 GDI-402: All flight connectors shall be designed to withsta ...

Y I,R

LISA Pathfinder


of 78




TRAN-592 GDI-2158: Individual mate/demates shall be recorded in a mat ...

Y R

TRAN-593 GDI-2157: The number of times flight connectors are mated / ...

Y R

TRAN-594 GDI-2156: If by prior agreement with ASU the number of mates ...

Y I,R

TRAN-595 GDI-403: Different connector classes shall be implemented i ...

Y R

3.5.4.3 Connector Characteristics

TRAN-597 GDI-405: Connectors at interfaces shall be clearly identifi ...

Y R

TRAN-598 GDI-406: Connectors shall not be a source of single point f ...

Y R

TRAN-599 GDI-407: Equipment or structure-mounted connectors shall be ...

Y R

TRAN-600 GDI-408: Male and female connectors shall be mechanically l ...

Y R

TRAN-601 GDI-409: Active lines together with their return shall be o ...

Y I

TRAN-602 GDI-410: Connectors shall be made of Non magnetic material ...

Y R

TRAN-603 GDI-411: For any unit connector which contains a number of ...

Y T,R

TRAN-604 GDI-412: Nominal and redundant lines shall have separated c ...

Y R

3.5.4.4 Connector Mounting

TRAN-606 GDI-414: All electrical connectors shall be located at a mi ...

Y R

TRAN-607 GDI-415: Connectors shall be arranged in such a way that th ...

Y R

TRAN-608 GDI-416: Mechanical methods in conjunction with identificat ...

Y I,R

TRAN-609 GDI-417: Connector savers shall be utilized on all flight s ...

Y R

TRAN-610 GDI-418: The connection shield ground pin to case shall be ...

Y R

3.5.4.5 Test Connectors

TRAN-612 GDI-420: Test connectors shall have sufficient protection t ...

Y R

LISA Pathfinder


of 78




TRAN-613 GDI-421: Test connectors shall be protected by EMC metal co ...

Y I,R

TRAN-614 GDI-422: The metallic protection cover shall be capable of ...

Y R

3.5.5 Standard Interfaces 3.5.5.2 Standard Balanced Digital link (SBDL)

TRAN-617 GDI-438: The SBDL link interface is dedicated to serial dig ...

Y T,R

TRAN-618 GDI-1201: The contractor shall design his side of the Standa ...

Y T,R

3.5.5.3 UART Serial Link (USL)

TRAN-620 GDI-450: The UART RS-422 serial link shall be composed of t ...

Y R

TRAN-621 GDI-451: The UART RS-422 Serial Link Interface shall be imp ...

Y R

TRAN-622 GDI-452: The contractor shall design his part of the UART R ...

Y R

TRAN-623 GDI-453: Figure GDI-456 shows an example for data transmiss ...

Y R

TRAN-624 GDI-1274: The OBC shall be able to send commands on the Tran ...

Y T

TRAN-625 GDI-1275: No data repetition mechanism in both directions sh ...

Y T

TRAN-626 GDI-1276: Command messsages sent by the OBC to the user and ...

Y T

3.5.5.5 Housekeeping Analog Acquisitions

TRAN-628 GDI-471: The interface shall consist of a differential link ...

Y R

3.5.5.5.2 Analogue Telemetry Aquisition (AN2)

TRAN-630 GDI-1210: Analogue Telemetry Acquisition 0V to +5V Interface ...

Y T,R

3.5.5.5.3 Analogue Telemetry Aquisition (AN3)

TRAN-632 GDI-1211: Analogue Telemetry Acquisition -10V to +10V Interf ...

Y T,R

3.5.5.6 Temperature Acquisitions (ANY, ANP, ANF, ANT)

TRAN-634 GDI-482: The signal shall be transmitted via twisted shield ...

Y R

TRAN-635 GDI-483: The temperature aquisition interface circuitry, as ...

Y R

3.5.5.6.1 Thermistor Type1: YSI-44907/-44908 (ANY)

LISA Pathfinder


of 78




TRAN-637 GDI-1215: Temperature Acquisition Type 1: YSI 44907/YSI-4490 ...

Y T,R

3.5.5.7 Relay Commands (SHP, EHP, SLP)

TRAN-639 GDI-493: The High Power On/Off Command source shall be refe ...

Y R

TRAN-640 GDI-494: The High Power On/Off Command receiver shall be is ...

Y R

TRAN-641 GDI-495: The High Power On/Off Command receiver shall be eq ...

Y R

TRAN-642 GDI-496: The High Power On/Off Command source shall be shor ...

Y R

TRAN-643 GDI-1220: The Standard High Power On/Off Command interface s ...

Y R

3.5.5.7.1 Standard High Power On/Off Command (SHP)

TRAN-645 GDI-497: Standard High Power On/Off Command: The contractor ...

Y T,R

3.5.5.8 Relay Status Acquisitions (RSA)

TRAN-647 GDI-1229: The open/closed status of a relay/switch contact ( ...

Y R

TRAN-648 GDI-516: Relay Status Acquisition The contractor shall desi ...

Y T,R

3.5.5.9 COMMS Interfaces (TT&C) 3.5.5.9.1 X-Band Digital TC Channel Interface (XTC)

TRAN-651 GDI-527: The X-Band Digital TC Channel shall consist of 3 s ...

Y R

TRAN-652 GDI-1283: The X-Band Digital TC Channel shall be transmitted ...

Y R

3.5.5.9.2 X-Band Receiver Lock Status Interface (RLS)

TRAN-654 GDI-535: The X-Band Receiver Lock Status signal shall be tr ...

Y T,R

3.5.5.9.3 X-Band Digital TM Channel Interface (XTM)

TRAN-656 GDI-538: The X-Band Digital TM Channel shall consist of 2 s ...

Y R

TRAN-657 GDI-539: The X-Band Digital TM channel shall be transmitted ...

Y R

3.5.6 Electrical Interface Control Document

TRAN-659 GDI-558: Interfaces will be formally controlled within the ...

Y R

LISA Pathfinder


of 78




3.5.7 EMC Requirements

TRAN-661 GDI-2154: In order to achieve compliance with the requiremen ...

Y A,R

3.5.7.1 Bonding

TRAN-663 GDI-562: The bond shall be resistant against corrosion and ...

Y R

TRAN-664 GDI-563: Metallic parts of each electrical equipment chassi ...

Y T

TRAN-665 GDI-564: Joint faces shall be flat and clean before assembl ...

Y I,R

TRAN-666 GDI-565: All non-electrical equipment shall be bonded to th ...

Y T

TRAN-667 GDI-566: Each electrical equipment chassis (case) shall be ...

Y T,R

TRAN-668 GDI-567: Metallic receptacles of connectors shall be electr ...

Y T

3.5.7.1.1 Ground Reference Rail

TRAN-670 GDI-569: Electrical bonding throughout CFRP structure shall ...

Y R

TRAN-671 GDI-570: The resistance between any adjacent parts of the G ...

Y T,R

TRAN-672 GDI-571: The resistance between any two points of the GRR s ...

Y T,R

3.5.7.1.2 Cable and Harness Shields

TRAN-674 GDI-573: Where shielded wires are used, the shield shall be ...

Y R

TRAN-675 GDI-574: The maximum unshielded length of any shielded wire ...

Y R

TRAN-676 GDI-575: Daisy chaining of shield terminations shall be avo ...

Y R

TRAN-677 GDI-576: Shields shall not be used as an intentional curren ...

Y R

3.5.7.1.4 Mechanical Parts

TRAN-679 GDI-581: Mechanical Parts without electrical nor shielding ...

Y T,R

TRAN-680 GDI-582: Mechanical Parts used for electromagnetic shieldin ...

Y T,R

3.5.7.2 Grounding and Isolation 3.5.7.2.1 General

LISA Pathfinder


of 78




TRAN-683 GDI-585: Each unit shall provide a grounding point, which i ...

Y I

TRAN-684 GDI-586: CFRP and SiC shall not be used as an electrical bo ...

Y R

3.5.7.2.2 Electrical and Electronic Unit Requirement

TRAN-686 GDI-588: The structure of electrical and electronic unit sh ...

Y T

TRAN-687 GDI-589: Openings for drainage, ventilation, etc... shall n ...

Y I

TRAN-688 GDI-590: All units shall have a M4 bonding stud ...

Y I

TRAN-689 GDI-591: The design of this bonding stud shall allow the co ...

Y I

3.5.7.3 Primary and Secondary Power Lines 3.5.7.3.1 Primary Power Lines

TRAN-692 GDI-605: Isolation: Within all units the primary power buse ...

Y R

TRAN-693 GDI-606: Isolation: All units (except PCDU) shall maintain ...

Y T,R

3.5.7.3.2 Secondary Power Lines

TRAN-695 GDI-609: Grounding: All secondary supplies, inside a unit, ...

Y I,R

TRAN-696 GDI-1988: Equipment with its own dedicated DC - DC converter ...

Y T

TRAN-697 GDI-610: Isolation: prior to connection of the unit interna ...

Y T,R

TRAN-698 GDI-2106: After grounding, the impedance between the unit se ...

Y T,R

TRAN-699 GDI-614: Grounding diagram including zero volts interconnec ...

Y I

TRAN-700 GDI-615: The symbols in Figure GDI-2107 below shall be used ...

Y R

3.5.7.3.3 Signal Interfaces

TRAN-702 GDI-617: Signal circuits interfacing between Satellite equi ...

Y R

TRAN-703 GDI-618: Where single-ended signal transmitters are used, i ...

Y R

TRAN-704 GDI-619: The use of common signal return paths is only perm ...

Y R

3.5.7.3.4 EGSE Grounding and Isolation

LISA Pathfinder


of 78




TRAN-706 GDI-621: EGSE signal and power circuits interfacing with fl ...

Y R

3.5.7.4 Magnetic Moment

TRAN-708 GDI-1997: Each equipment shall be designed and fabricated to ...

Y T,R

TRAN-709 GDI-1998: All equipments shall provide magnetic dipole momen ...

Y T

3.6 Operations Design and Interface Requirements 3.6.1 Bit / Byte Numbering Convention

TRAN-712 GDI-632: In all project specific documentation including co ...

Y T,R

TRAN-713 GDI-634: During file transfer, within any data type structu ...

Y T,R

3.6.2 Operational Functions 3.6.2.1 Handling of Operational Configuration, Modes and

States

TRAN-716 GDI-638: Mode/State transitions: Transitions from one mode/ ...

Y R

TRAN-717 GDI-639: The unit supplier shall identify appropriate modes ...

Y R

TRAN-718 GDI-640: At all times, equipment and units shall be in a cl ...

Y T,R

TRAN-719 GDI-641: In addition, modes and the mode transitions manage ...

Y T,R

TRAN-720 GDI-642: The unit supplier shall identify all internal and ...

Y R

TRAN-721 GDI-643: The unit supplier shall identify all transition ti ...

Y R

TRAN-722 GDI-644: Mode/State transitions with duration longer than 1 ...

Y R

TRAN-723 GDI-645: It shall be possible to command the unit into each ...

Y T,R

3.6.2.2 Commandability 3.6.2.2.1 General

TRAN-726 GDI-648: Commandability is characterised by the set of comm ...

Y T

TRAN-727 GDI-649: In operating states of the unit, it shall be possi ...

Y T

TRAN-728 GDI-650: In addition, in non-operating states of the unit, ...

Y T

LISA Pathfinder


of 78




TRAN-729 GDI-651: Individual switching of switchable elements (e.g. ...

Y T

TRAN-730 GDI-652: The on-board reception, processing and execution o ...

Y T,R

TRAN-731 GDI-653: The function of a command shall not change through ...

Y T,R

TRAN-732 GDI-654: A single command may be used to initialise a chang ...

Y T,R

TRAN-733 GDI-655: Commands with variable bit-fields meaning shall no ...

Y R

TRAN-734 GDI-656: Nominal and the redundant functions or equipments ...

Y T

TRAN-735 GDI-657: The unit design shall avoid any conflict between a ...

Y T

3.6.2.3 Observability 3.6.2.3.1 General

TRAN-738 GDI-660: Observability is characterised by the set of telem ...

Y R

TRAN-739 GDI-661: The unit shall provide in its housekeeping telemet ...

Y T,R

TRAN-740 GDI-662: The unit shall provide the necessary instrumentati ...

Y T,R

TRAN-741 GDI-663: Telemetry measurement sensors shall be designed su ...

Y T

TRAN-742 GDI-664: It shall be possible to determine the status of th ...

Y T

TRAN-743 GDI-665: Essential (high-priority) telemetry data enabling ...

Y T,R

TRAN-744 GDI-666: Telemetry shall always be provided to identify una ...

Y T,R

TRAN-745 GDI-667: Status information in telemetry shall be provided ...

Y T,R

TRAN-746 GDI-668: Any TM processing required at a higher operational ...

Y R

TRAN-747 GDI-669: Telemetry shall always be available to determine t ...

Y R

TRAN-748 GDI-670: When a key parameter is derived on-board from seve ...

Y T,R

3.6.2.3.2 Telemetry Acquisition

LISA Pathfinder


of 78




TRAN-750 GDI-672: The TM acquisition process by the data bus shall n ...

Y T

TRAN-751 GDI-673: The unit design shall avoid any conflict between t ...

Y T

TRAN-752 GDI-674: TM acquisitions with conditional meaning shall not ...

Y R

TRAN-753 GDI-675: The value of a telemetry parameter shall be transm ...

Y R

TRAN-754 GDI-676: Analog TM Acquisition: Analog TM acquisitions sha ...

Y T,R

TRAN-755 GDI-677: Acquisition of safety critical analog parameters o ...

Y R

TRAN-756 GDI-678: The values of currents or voltages readings shall ...

Y R

TRAN-757 GDI-679: The calibration curve of an analog parameter shall ...

Y R

3.6.2.3.3 Observability of Hardware Configuration

TRAN-759 GDI-681: At switch on, the configuration of the unit at ele ...

Y T

TRAN-760 GDI-682: In case a unit includes several elementary functio ...

Y R

TRAN-761 GDI-683: The configuration of any on-board device and any s ...

Y T,R

TRAN-762 GDI-684: Any configuration command register shall be observ ...

Y R

TRAN-763 GDI-685: The acquisition of the unit configuration/state sh ...

Y R

TRAN-764 GDI-686: The acquisition of an ON/OFF status for a relay sh ...

Y R

TRAN-765 GDI-687: If the unit controls the redundancy configuration ...

Y T

TRAN-766 GDI-688: Nominal and redundant functions shall be observabl ...

Y R

3.6.2.3.4 Observability of Commands

TRAN-768 GDI-690: Commands to the unit shall be acknowledged in an u ...

Y R

TRAN-769 GDI-691: Acknowledgement of commands shall be direct (i.e. ...

Y T,R

LISA Pathfinder


of 78




TRAN-770 GDI-692: The association between command acknowledgement ac ...

Y I

TRAN-771 GDI-693: Successful execution of a command to the unit shal ...

Y T,R

TRAN-772 GDI-694: Failures in the acceptance and /or the execution o ...

Y T,R

3.6.2.3.5 Converters Observability

TRAN-774 GDI-696: Sufficient data to monitor the converters shall be ...

Y T

3.6.2.4 Safety Critical and Hazardous Functions

TRAN-776 GDI-700: All critical commands shall be identified at equip ...

Y A

TRAN-777 GDI-701: The execution of any unit command or command seque ...

Y A

TRAN-778 GDI-702: Commanding of critical commands shall be implement ...

Y A,R

TRAN-779 GDI-703: The status of inhibition of safety critical functi ...

Y T

TRAN-780 GDI-704: Units shall provide an unambiguous health status o ...

Y T

3.6.2.5 Handling of Memories

TRAN-782 GDI-706: Any part of installed RAM’s shall be readable by m ...

Y T

TRAN-783 GDI-707: Any part of installed RAM’s shall be overwriteable ...

Y T

TRAN-784 GDI-708: Any part of installed ROM’s shall be readable by m ...

Y T

TRAN-785 GDI-709: For failure investigation, it shall be possible to ...

Y T

3.6.2.6 Autonomy

TRAN-787 GDI-711: Apart from failure situations, the unit shall oper ...

Y T

TRAN-788 GDI-712: All parameters used for autonomous operations and ...

Y T

3.6.2.7 Automatic Functions

TRAN-790 GDI-714: It shall be possible to inhibit and to override al ...

Y T

TRAN-791 GDI-715: All actions generated by automatic on-board logic ...

Y T

LISA Pathfinder


of 78




TRAN-792 GDI-716: The automatic function design shall be such that n ...

Y A,R

TRAN-793 GDI-717: Telemetry shall be associated to all automatic fun ...

Y T

TRAN-794 GDI-718: For all the automatic logic using several criteria ...

Y T

TRAN-795 GDI-719: The capability to change all on board logic (hardw ...

Y T,R

3.6.2.8 Time Synchronisation

TRAN-797 GDI-721: If the unit has operationally not been synchronise ...

Y R

TRAN-798 GDI-722: If the unit has the function, all information on h ...

Y R

TRAN-799 GDI-723: Timing information provided in Housekeeping teleme ...

Y T,R

3.6.2.9 Fault Management / FDIR 3.6.2.9.1 Unit Fault Protection

TRAN-802 GDI-726: Any unit shall be able to withstand (i.e. remain i ...

Y T,R

TRAN-803 GDI-727: Any unit shall be able to withstand (i.e. remain i ...

Y T,R

TRAN-804 GDI-728: It shall be possible to repeat any command several ...

Y T,R

3.6.2.9.2 Unit Self Tests

TRAN-806 GDI-730: All units that perform regular self-tests shall re ...

Y R

3.6.2.9.3 Failure Detection, Isolation and Recovery (FDIR) Functions

TRAN-808 GDI-733: FDIR functions shall be implemented in a hierarchi ...

Y A,R

TRAN-809 GDI-734: The unit shall automatically detect any failure, w ...

Y T,R

TRAN-810 GDI-735: At unit level failures shall be detectable by adeq ...

Y A

TRAN-811 GDI-736: Failure detection algorithms shall report in event ...

Y A,R

TRAN-812 GDI-737: Failures which require a reaction time less than 1 ...

Y T,A

TRAN-813 GDI-738: Failure which requires a reaction time between 10s ...

Y A,R

LISA Pathfinder


of 78




TRAN-814 GDI-739: Failure isolation shall be performed at switchable ...

Y T,A

TRAN-815 GDI-740: Any FDIR actions on unit level shall be reported t ...

Y T,R

TRAN-816 GDI-741: The need for intervention of higher levels to reac ...

Y T,A,R

3.6.3 Other Requirements 3.6.3.1 Inputs to Design Justification File

TRAN-819 GDI-744: The unit supplier shall provide a design justifica ...

Y R

3.6.3.2 Inputs to Operational Database

TRAN-821 GDI-746: The unit supplier shall provide inputs to the Oper ...

Y R

TRAN-822 GDI-747: Data to be provided (the list is not exhaustive): ...

Y R

3.6.3.3 Operation Manual

TRAN-824 GDI-749: The unit supplier shall provide an Operations Manu ...

Y R

TRAN-825 GDI-750: The following standardization (Table GDI-751) shal ...

Y R

4 Environment Design Requirements 4.1 Atmospheric Conditions 4.1.1 Humidity

TRAN-829 GDI-771: The unit shall be designed to withstand a relative ...

Y R

4.1.2 Cleanliness

TRAN-831 GDI-773: The cleanliness design requirements on the unit H/ ...

Y R

4.1.3 Storage time

TRAN-833 GDI-775: The S/C units flight H/W shall be designed to with ...

Y R

4.1.4 Pressure Environment

TRAN-835 GDI-780: Units mounted on the S/C shall be designed to with ...

Y T

4.1.5 Contamination

TRAN-837 GDI-782: Cleanliness requirements are as defined in the Sec ...

Y T,R

4.2 Mechanical Environment 4.2.1 Ground Operations Loads

LISA Pathfinder


of 78




TRAN-840 GDI-790: The equipment/assembly and associated transport co ...

Y T,A

TRAN-841 GDI-793: During ground transportation the equipments shall ...

Y T,A

TRAN-842 GDI-795: The design of transport containers shall be such t ...

Y T,A

4.2.2 Launch and Early Orbit Phase. 4.2.2.1 Quasi static and low frequency loads

TRAN-845 GDI-799: The quasi-static and low frequency flight limit ac ...

Y T,A

4.2.2.2 Dynamic Environment 4.2.2.2.1 Sinusoidal Environment

TRAN-848 GDI-808: All units mounted on the SCM structure shall be de ...

Y T,A

4.2.2.2.2 Random Environment

TRAN-850 GDI-812: Units mounted on the SCM structure shall be desig ...

Y T,A

4.2.2.2.3 Shock Environment

TRAN-852 GDI-818: Units mounted on the SCM Structure shall be design ...

Y A,R

4.2.3 In Orbit Phase 4.2.3.1 Quasi-static & Thermo-elastic Loads

TRAN-855 GDI-823: During orbit and attitude correction manoeuvres, u ...

Y T,A,R

TRAN-856 GDI-2131: The unit shall be compatible with internal loads g ...

Y A

4.2.3.2 Micro-vibrations

TRAN-858 GDI-825: Generally, equipment generating micro-vibrations s ...

Y T,R

4.3 Thermal Environment 4.3.1 On-ground phase

TRAN-861 GDI-838: During transportation and storage, the spacecraft ...

Y R

4.3.3 In-orbit phase

TRAN-863 GDI-841: During the In Orbit phase, the spacecraft units wi ...

Y A,R

4.4 Radiation Environment 4.4.1 Introduction

TRAN-866 GDI-847: The radiation environment for the mission is shown ...

Y A,R

LISA Pathfinder


of 78




4.4.2 LISA-PF Radiation Environment 4.4.2.1 Galactic Cosmic Ray (GCR) and Solar Energetic

Particle Environment

TRAN-869 GDI-2087: The data provided for 0.66 g/cm2 shielding shall b ...

Y R

TRAN-870 GDI-1946: The integral LET spectra generated using CREME96 ( ...

Y R

TRAN-871 GDI-2088: The proton flux data generated using CREME96 are s ...

Y R

4.4.3 Long Term Effect Considerations 4.4.3.1 Ionizing Dose Depth Curve

TRAN-874 GDI-1966: The radiation environment for the mission shall be ...

Y A,R

4.4.4 Rules for Design and Performance

TRAN-876 GDI-876: Protective shielding by the outer panels of the sa ...

Y R

TRAN-877 GDI-877: Any unit shall take into account the shielding pro ...

Y A,R

4.4.5 Radiation Sensitive Components

TRAN-879 GDI-1969: The Subcontractor shall implement a Radiation Hard ...

Y R

TRAN-880 GDI-1970: All parts shall be reviewed by the Subcontractor t ...

Y R

TRAN-881 GDI-1971: The Subcontractor shall issue a Radiation Assessme ...

Y R

4.4.5.1 Total Dose

TRAN-883 GDI-1975: The total dose to be taken into account is defined ...

Y A,R

4.4.5.2 Single Event Effects (SEE)

TRAN-885 GDI-1977: Parts are considered SEE immune when the LETth is ...

Y R

TRAN-886 GDI-1978: The component shall be designed to tolerate GCR, p ...

Y T,A,R

4.4.5.3 Single Event Latch-up

TRAN-888 GDI-1980: Devices with a LETth for SEL less than 60 MeV-cm2/ ...

Y A,R

4.4.5.4 Non Destructive Single Event (Single Event Upset, Single Event Transient...)

TRAN-890 GDI-1982: Part types shall be acceptable according to the ac ...

Y A,R

LISA Pathfinder


of 78




TRAN-891 GDI-1987: The reset or data corruption occurrence rate due t ...

Y A,R

4.4.5.5 Single Event Burnout (SEB) and Single Event Gate Rupture (SEGR)

TRAN-893 GDI-1984: For SEB and SEGR, error rate prediction techniques ...

Y A,R

4.4.5.6 Displacement Damage

TRAN-895 GDI-1986: Parametric and functional sensitivity of an EEE pa ...

Y R

4.5 EMC Environment 4.5.1 EMC Performance Requirements 4.5.1.1 Inrush Current

TRAN-899 GDI-895: Inrush current at unit switch on shall not exceed ...

Y T,R

4.5.1.2 Voltage Transients

TRAN-901 GDI-897: The transient on the primary power bus distributio ...

Y T

TRAN-902 GDI-899: Conducted voltage transients on the primary power ...

Y T

4.5.1.3 Conducted Emissions on Regulated Power Bus 4.5.1.3.1 Conducted Emissions on Power Leads,

Frequency Domain

TRAN-905 GDI-902: Conducted narrow band current emissions (different ...

Y T

TRAN-906 GDI-904: Conducted narrow band current emissions (common mo ...

Y T

4.5.1.3.2 Conducted Emissions on Power Leads, Time Domain

TRAN-908 GDI-907: Time domain conducted differential mode voltage ri ...

Y T

TRAN-909 GDI-908: Time domain conducted voltage spikes on the primar ...

Y T

4.5.2 Radiated Emissions - E field

TRAN-911 GDI-922: The unit shall not exceed the specified limits in ...

Y T

4.5.3 Radiated Emissions - H field

TRAN-913 GDI-926: The radiated H field generated by Units, shall be ...

Y T

4.5.4 Radiated Emissions Fluctuations - E Field

TRAN-915 GDI-2013: Any specific requirements on E-field will be detai ...

Y R

LISA Pathfinder


of 78




4.5.5 Radiated Emissions Fluctuations - H Field

TRAN-917 GDI-2022: Any specific requirements on H-field will be detai ...

Y R

4.5.6 Radiated Susceptibility - E field

TRAN-919 GDI-928: The unit shall not show any malfunction or deviati ...

Y T

TRAN-920 GDI-929: No unit that is powered On at launch shall show an ...

Y T

4.5.7 Radiated Susceptibility - H field

TRAN-922 GDI-932: Units shall not be susceptible when submitted to t ...

Y T

4.5.9 Conducted Susceptibility Power Lines 4.5.9.1 Conducted Susceptibility Sine Wave - Differential

Mode

TRAN-925 GDI-938: Primary power bus powered units shall not exhibit ...

Y T

4.5.9.2 Conducted Susceptibility Sine Wave - Common Mode

TRAN-927 GDI-2000: The unit shall not exhibit any malfunction, degrad ...

Y T

4.5.9.3 Conducted Susceptibility - Transient

TRAN-929 GDI-2007: The unit shall not exhibit any malfunctions, degra ...

Y T

TRAN-930 GDI-2009: Transient Type 1 With reference to (figure GDI-941 ...

Y T

TRAN-931 GDI-2010: Transient Type 2 With reference to (figure GDI-941 ...

Y T

4.5.9.4 CE / CS on Interface signal lines

TRAN-933 GDI-944: No unit shall exhibit any malfunction, degradation ...

Y T

TRAN-934 GDI-2089: The unit shall not exhibit any malfunction, degrad ...

Y T

4.5.11 DC Magnetic Requirements

TRAN-936 GDI-954: The use of ferro-magnetics shall be avoided for pa ...

Y I,R

TRAN-937 GDI-956: Steel or other magnetic materials shall be avoided ...

Y I,R

LISA Pathfinder


of 78




TRAN-938 GDI-958: The use of relays shall be limited to the most cri ...

Y R

TRAN-939 GDI-959: The permitted magnetic moment of equipments shall ...

Y R

4.5.12 ESD Susceptibility

TRAN-941 GDI-962: The unit shall not be susceptible when submitted t ...

Y T

4.5.13 Corona and Multipaction Requirements 4.5.13.1 Multipaction Discharge

TRAN-944 GDI-2172: All high power output equipment and components (> ...

Y T

TRAN-945 GDI-2171: This shall be demonstrated up to 6dB above the pea ...

Y T

TRAN-946 GDI-2170: All power levels between 10 W (or a minimum signif ...

Y T

TRAN-947 GDI-2169: All multipaction tests shall be performed in the p ...

Y T

4.5.13.2 Corona Gas Discharge

TRAN-949 GDI-2177: Between any two conductors corona or gas discharge ...

Y T

TRAN-950 GDI-2175: Equipments and sub-systems shall be free from gas ...

Y T

TRAN-951 GDI-2174: Adequate venting shall be provided to ensure that ...

Y A

TRAN-952 GDI-2173: If the above requirements cannot be met then fligh ...

Y T

5 Unit Level Environment Test Requirements 5.1 General 5.1.1 Test Definition 5.1.1.1 Qualification tests

TRAN-957 GDI-967: Qualification of the design shall be accomplished ...

Y T,A

5.1.1.2 Acceptance Tests

TRAN-959 GDI-969: Environmental acceptance testing shall be performe ...

Y T,A,R

5.1.1.3 Functional Performance Tests

TRAN-961 GDI-971: The objective of the test item functional performa ...

Y T,A

5.1.2 Test Facilities Requirements

LISA Pathfinder


of 78




TRAN-963 GDI-973: Any test facility to be used within the instrument ...

Y A,R

5.1.2.1 Accuracy of Test Instrumentation

TRAN-965 GDI-975: The accuracy of instrument and test equipment used ...

Y A,R

5.1.2.2 Tolerances of Test Parameters

TRAN-967 GDI-977: The allowed test condition tolerances shall be app ...

Y A,I,R

5.1.2.3 Facility Ambient Condition

TRAN-969 GDI-981: Unless otherwise specified herein, all measurement ...

Y A,I,R

5.1.3 Test Execution

TRAN-971 GDI-983: Test execution shall be started only if all starti ...

Y A,I,R

5.1.4 Success Criteria

TRAN-973 GDI-985: The test is successfully performed if all measurem ...

Y T,A

5.2 Unit Tests 5.2.1 Mechanical Environment Tests 5.2.1.1 Vibration Test Set Up

TRAN-977 GDI-989: The unit under test shall be mounted (to a rigid f ...

Y T

TRAN-978 GDI-990: At least one triaxial sensor shall be mounted on t ...

Y T

TRAN-979 GDI-991: At least two axis aligned sensors shall be mounted ...

Y T

TRAN-980 GDI-992: All units powered on during launch shall be powere ...

Y T

5.2.1.2 Test Fixture

TRAN-982 GDI-995: The test item shall be attached to the vibration e ...

Y T

TRAN-983 GDI-996: The variation of transmissibility between test ite ...

Y T

TRAN-984 GDI-997: Adequate fixture design and specimen installation ...

Y T

TRAN-985 GDI-998: A pre-test of the empty fixture shall be performed ...

Y T

5.2.1.3 Frequency Search

TRAN-987 GDI-1000: Frequency search tests shall be conducted in order ...

Y T

LISA Pathfinder


of 78




TRAN-988 GDI-1002: Frequency search tests shall be conducted along ea ...

Y T

5.2.1.4 Vibration Tests Level

TRAN-990 GDI-1005: For units the vibration test levels that are appli ...

Y A,R

5.2.1.5 Sine And Random Vibration Test

TRAN-992 GDI-1011: Sine and random vibration tests shall be performed ...

Y T

TRAN-993 GDI-1012: Prior and after sine and random vibration qualific ...

Y T

TRAN-994 GDI-1013: Before applying full levels, a test at intermediat ...

Y T

TRAN-995 GDI-1015: The vibration facility shall include a shock free ...

Y T

5.2.1.6 Shock Tests

TRAN-997 GDI-1017: Units shall demonstrate by test their ability to w ...

Y T

TRAN-998 GDI-1018: Prior and after shock tests a low level sine frequ ...

Y T

5.2.1.7 Static tests

TRAN-1000 GDI-1020: Static tests shall be performed by applying the sp ...

Y T

5.2.2 Units Thermal Environment Tests 5.2.2.1 Thermal Test Setup

TRAN-1003 GDI-1024: The temperatures shall be selected and controlled ...

Y R

TRAN-1004 GDI-1025: The test arrangement shall be as shown in Figure G ...

Y R

TRAN-1005 GDI-1026: The unit shall be bolted to a thermally controlled ...

Y R

TRAN-1006 GDI-1027: On all external surfaces flight representative the ...

Y R

TRAN-1007 GDI-1028: The heat sink (HS) plates shall be black painted ( ...

Y R

TRAN-1008 GDI-1029: The conductive heat sink temperature and the chamb ...

Y R

TRAN-1009 GDI-1030: For vacuum tests the pressure inside the chamber s ...

Y R

5.2.2.2 Thermal Test Sequences 5.2.2.2.1 Qualification Thermal Vacuum

LISA Pathfinder


of 78




TRAN-1012 GDI-1034: Unit’s suppliers shall perform Thermal Vacuum (TV) ...

Y T

TRAN-1013 GDI-1036: The TV test on unit level shall be performed as in ...

Y R

TRAN-1014 GDI-1037: The qualification temperatures for the different u ...

Y R

TRAN-1015 GDI-1038: The units shall be tested following the thermal va ...

Y T,R

5.2.2.2.2 Acceptance Thermal Vacuum

TRAN-1017 GDI-1044: Unit suppliers shall perform thermal vacuum (TV) a ...

Y T

TRAN-1018 GDI-1045: The thermal vacuum acceptance test shall be perfor ...

Y T,R

5.2.2.2.3 Protoflight Thermal Vacuum

TRAN-1020 GDI-1049: Unit suppliers shall perform thermal vacuum (TV) p ...

Y T

TRAN-1021 GDI-1050: The thermal vacuum protoflight test shall be perfo ...

Y T,R

5.2.3 Electromagnetic Compatibility Tests 5.2.3.1 General EMC Test Requirements 5.2.3.1.1 EMC Development Test

TRAN-1025 GDI-1057: Development tests may be performed to evaluate the ...

Y T,R

5.2.3.1.2 EMC Qualification Test

TRAN-1027 GDI-1059: Qualification tests for PFM shall be performed as ...

Y T,R

5.2.3.1.3 EMC Acceptance Test

TRAN-1029 GDI-1061: Acceptance tests for FM shall be performed as spec ...

Y T,R

5.2.3.1.4 EMC Integration Test

TRAN-1031 GDI-1063: In order to ensure the proper grounding of the sec ...

Y T,R

5.2.3.1.5 Retest Criteria

TRAN-1033 GDI-1065: A retest may be required in case a test result is ...

Y R

5.2.3.1.6 Pre and Post Test Inspection

TRAN-1035 GDI-1067: The pre- and post-test inspection is specified in ...

Y R

5.2.3.1.7 Test Sequence

LISA Pathfinder


of 78




TRAN-1037 GDI-2155: The actual EMC test sequence shall be agreed with ...

Y R

5.2.3.2 Test Facility 5.2.3.2.1 EMC Test Environment

TRAN-1040 GDI-1072: All EMC tests shall be conducted at standard ambie ...

Y R

5.2.3.2.2 Capabilities

TRAN-1042 GDI-1074: The test facilities used for the EMC test program ...

Y R

5.2.3.3 Test Instrumentation 5.2.3.3.1 General Tolerances and Test Parameters

TRAN-1045 GDI-1077: The maximum allowable tolerance for the test param ...

Y R

5.2.3.3.2 Accuracy of the Test Measurement Equipment

TRAN-1047 GDI-1079: The accuracy of measurement equipment and test equ ...

Y R

5.2.3.3.3 Special Requirements on the Test Equipment

TRAN-1049 GDI-1081: Grounding of Test Equipment: Measurement equipment ...

Y R

TRAN-1050 GDI-1082: Antenna Placement: For radiated emission measureme ...

Y R

TRAN-1051 GDI-1083: Receiver Bandwidth: The following receiver bandwid ...

Y R

TRAN-1052 GDI-1085: Power Adjustment: All spacecraft instruments and e ...

Y R

5.2.3.3.4 Line Impedance Stabilisation Network (LISN):

TRAN-1054 GDI-1087: For the conducted emission and susceptibility test ...

Y R

TRAN-1055 GDI-1090: The LISN has to be designed and provided by the co ...

Y T

TRAN-1056 GDI-2116: Derivation of the bus impedance shall be performae ...

Y T

5.2.3.3.5 Test Conditions

TRAN-1058 GDI-1095: The equipment under test shall be switched on in t ...

Y R

LISA Pathfinder


of 78




TRAN-1059 GDI-1096: For emission testing the unit shall operate within ...

Y R

TRAN-1060 GDI-1097: For susceptibility testing the suitable operationa ...

Y R

TRAN-1061 GDI-1098: After testing the equipment shall be switched off ...

Y R

TRAN-1062 GDI-1099: Both operational modes shall provide operational c ...

Y R

TRAN-1063 GDI-1100: The particular test set-up shall represent the fli ...

Y R

5.2.3.3.6 Susceptibility Testing

TRAN-1065 GDI-2142: The applicable pass/fail criteria for susceptibili ...

Y R

TRAN-1066 GDI-1103: Data Acquisition: The item under test shall be mon ...

Y T

5.2.3.4 Specific EMC Test Requirement 5.2.3.4.1 Electrical Bonding

TRAN-1069 GDI-1107: The bonding test shall be performed with the unit ...

Y R

TRAN-1070 GDI-1108: The bonding test shall be performed without any ha ...

Y R

5.2.3.4.2 Isolation

TRAN-1072 GDI-1111: The isolation test shall be performed with the UUT ...

Y R

5.2.3.4.3 Conducted Emissions on Power Lines 5.2.3.4.3.1 CE on Primary Power Lines

TRAN-1075 GDI-1116: UUT operation shall be selected in order to maximi ...

Y R

TRAN-1076 GDI-1118: Ripple and transient interference tests on the pow ...

Y R

5.2.3.4.4 Conducted Susceptibility, Signal Harnesses, Bulk Current Injection

TRAN-1078 GDI-2090: The mode selection for susceptibility testing shal ...

Y T,R

5.2.3.4.5 Conducted Susceptibility on Power Lines

TRAN-1080 GDI-1133: The mode selection for susceptibility testing shal ...

Y R

TRAN-1081 GDI-1134: The test set-ups are shown in Figure GDI-1135 (CS0 ...

Y T

LISA Pathfinder


of 78




5.2.3.4.7 Radiated Emission, Electric Field


Y R

5.2.3.4.8 Radiated Emissions, E-Field Fluctuations 5.2.3.4.9 Radiated Emission, Magnetic Field


Y R

5.2.3.4.10 Radiated Emissions, Magnetic Field Fluctuations

5.2.3.4.11 Radiated Susceptibility, Electric Field


Y R

5.2.3.4.12 Radiated Susceptibility, Magnetic Field


Y R

5.2.3.4.13 Electrostatic Discharge (ESD)


Y R

5.2.3.4.14 Magnetic Moment

TRAN-1095 GDI-1173: Verification by similarity may be applied to equip ...

Y A,R

5.2.4 Life Test

TRAN-1097 GDI-1185: A life test shall be required for all the assembli ...

Y T,R

5.2.5 Space Conditioning

TRAN-1099 GDI-1187: Space conditioning shall be performed whenever des ...

Y T,R

TRAN-1100 GDI-1188: The contractors shall propose the corresponding te ...

Y R

TRAN-1101 GDI-1189: For example, but without limitation to, materials ...

Y T

LISA Pathfinder


of 78



7. REQUIREMENT/SECTION CROSS REFERENCE

TRAN-47 ......... 3.1.......................10 TRAN-51 ......... 3.1.2....................10 TRAN-55 ......... 3.2.1.1.................11 TRAN-56 ......... 3.2.1.1.................11 TRAN-57 ......... 3.2.1.1.................11 TRAN-58 ......... 3.2.1.1.................11 TRAN-59 ......... 3.2.1.1.................11 TRAN-60 ......... 3.2.1.1.................11 TRAN-61 ......... 3.2.1.1.................11 TRAN-63 ......... 3.2.1.2.................12 TRAN-66 ......... 3.2.1.3.................12 TRAN-69 ......... 3.2.2.1.................12 TRAN-70 ......... 3.2.2.1.................12 TRAN-71 ......... 3.2.2.1.................12 TRAN-72 ......... 3.2.2.1.................12 TRAN-73 ......... 3.2.2.1.................12 TRAN-74 ......... 3.2.2.1.................12 TRAN-75 ......... 3.2.2.1.................12 TRAN-78 ......... 3.2.2.2.................13 TRAN-79 ......... 3.2.2.2.................13 TRAN-80 ......... 3.2.2.2.................13 TRAN-81 ......... 3.2.2.2.................13 TRAN-83 ......... 3.2.2.3.................13 TRAN-85 ......... 3.2.2.4.................14 TRAN-86 ......... 3.2.2.4.................14 TRAN-89 ......... 3.2.2.5.................14 TRAN-90 ......... 3.2.2.5.................14 TRAN-91 ......... 3.2.2.5.................14 TRAN-92 ......... 3.2.2.5.................14 TRAN-93 ......... 3.2.2.5.................14 TRAN-94 ......... 3.2.2.5.................14 TRAN-95 ......... 3.2.2.5.................14 TRAN-97 ......... 3.2.2.6.................15 TRAN-98 ......... 3.2.2.6.................15 TRAN-99 ......... 3.2.2.6.................15 TRAN-104 ....... 3.2.2.8.1..............15 TRAN-105 ....... 3.2.2.8.1..............15 TRAN-106 ....... 3.2.2.8.1..............15 TRAN-109 ....... 3.2.2.8.2..............16 TRAN-113 ....... 3.2.2.9.1..............18 TRAN-115 ....... 3.2.2.9.2..............18 TRAN-116 ....... 3.2.2.9.2..............18 TRAN-118 ....... 3.2.2.9.3..............18 TRAN-121 ....... 3.2.2.9.4..............18 TRAN-122 ....... 3.2.2.9.4..............18 TRAN-124 ....... 3.2.2.9.5..............19 TRAN-126 ....... 3.2.2.9.6..............19 TRAN-129 ....... 3.2.3.1.................19 TRAN-130 ....... 3.2.3.1.................19 TRAN-132 ....... 3.2.3.2.................19 TRAN-135 ....... 3.2.3.3.1..............20 TRAN-136 ....... 3.2.3.3.1..............20 TRAN-138 ....... 3.2.3.3.2..............20 TRAN-139 ....... 3.2.3.3.2..............20 TRAN-140 ....... 3.2.3.3.2..............20 TRAN-141 ....... 3.2.3.3.2..............20 TRAN-142 ....... 3.2.3.3.2..............20

TRAN-144 ....... 3.2.3.4................. 20 TRAN-145 ....... 3.2.3.4................. 20 TRAN-146 ....... 3.2.3.4................. 20 TRAN-148 ....... 3.2.3.5................. 21 TRAN-150 ....... 3.2.3.6................. 21 TRAN-152 ....... 3.2.3.7................. 21 TRAN-153 ....... 3.2.3.7................. 21 TRAN-156 ....... 3.2.3.8.1.............. 21 TRAN-157 ....... 3.2.3.8.1.............. 21 TRAN-158 ....... 3.2.3.8.1.............. 21 TRAN-159 ....... 3.2.3.8.1.............. 21 TRAN-160 ....... 3.2.3.8.1.............. 21 TRAN-162 ....... 3.2.3.8.1.............. 21 TRAN-163 ....... 3.2.3.8.1.............. 21 TRAN-164 ....... 3.2.3.8.1.............. 21 TRAN-165 ....... 3.2.3.8.1.............. 21 TRAN-167 ....... 3.2.3.8.2.............. 22 TRAN-168 ....... 3.2.3.8.2.............. 22 TRAN-170 ....... 3.2.3.8.3.............. 23 TRAN-171 ....... 3.2.3.8.3.............. 23 TRAN-172 ....... 3.2.3.8.3.............. 23 TRAN-174 ....... 3.2.3.8.4.............. 23 TRAN-176 ....... 3.2.3.9................. 23 TRAN-177 ....... 3.2.3.9................. 23 TRAN-178 ....... 3.2.3.9................. 23 TRAN-180 ....... 3.2.3.10............... 24 TRAN-182 ....... 3.2.3.11............... 24 TRAN-183 ....... 3.2.3.11............... 24 TRAN-185 ....... 3.2.4.................... 24 TRAN-187 ....... 3.2.4.1................. 24 TRAN-188 ....... 3.2.4.1................. 24 TRAN-189 ....... 3.2.4.1................. 24 TRAN-190 ....... 3.2.4.1................. 24 TRAN-193 ....... 3.2.4.2................. 25 TRAN-194 ....... 3.2.4.2................. 25 TRAN-195 ....... 3.2.4.2................. 25 TRAN-197 ....... 3.2.4.3................. 25 TRAN-198 ....... 3.2.4.3................. 25 TRAN-199 ....... 3.2.4.3................. 25 TRAN-200 ....... 3.2.4.3................. 25 TRAN-201 ....... 3.2.4.3................. 25 TRAN-203 ....... 3.2.4.4................. 26 TRAN-205 ....... 3.2.4.5................. 26 TRAN-206 ....... 3.2.4.5................. 26 TRAN-208 ....... 3.2.4.6................. 26 TRAN-209 ....... 3.2.4.6................. 26 TRAN-210 ....... 3.2.4.6................. 26 TRAN-212 ....... 3.2.4.7................. 27 TRAN-214 ....... 3.2.4.8................. 27 TRAN-216 ....... 3.2.4.9................. 27 TRAN-220 ....... 3.3.1.1................. 28 TRAN-221 ....... 3.3.1.1................. 28 TRAN-223 ....... 3.3.1.2................. 28 TRAN-224 ....... 3.3.1.2................. 28 TRAN-226 ....... 3.3.1.3................. 28 TRAN-228 ....... 3.3.1.4................. 29 TRAN-230 ....... 3.3.1.5................. 29

TRAN-233........3.3.2.1 .................29 TRAN-235........3.3.2.2 .................29 TRAN-237........3.3.2.3 .................29 TRAN-239........3.3.2.4 .................29 TRAN-241........3.3.2.5 .................29 TRAN-243........3.3.2.6 .................30 TRAN-245........3.3.2.7 .................30 TRAN-247........3.3.3 ....................30 TRAN-249........3.3.4 ....................30 TRAN-252........4 ..........................32 TRAN-255........4.1 .......................32 TRAN-257........4.1.1 ....................32 TRAN-259........4.1.2 ....................32 TRAN-261........4.1.3 ....................32 TRAN-263........4.2 .......................33 TRAN-266........4.2.1 ....................33 TRAN-268........4.2.2 ....................33 TRAN-269........4.2.2 ....................33 TRAN-270........4.2.2 ....................33 TRAN-271........4.2.2 ....................33 TRAN-272........4.2.2 ....................33 TRAN-274........4.2.3 ....................34 TRAN-276........4.2.4 ....................34 TRAN-277........4.2.4 ....................34 TRAN-279........4.2.5 ....................34 TRAN-280........4.2.5 ....................34 TRAN-282........4.2.6 ....................34 TRAN-283........4.2.6 ....................34 TRAN-286........4.2.7 ....................35 TRAN-288........4.2.8 ....................35 TRAN-290........4.3 .......................35 TRAN-292........4.4 .......................35 TRAN-293........4.4 .......................35 TRAN-294........4.4 .......................35 TRAN-295........4.4 .......................35 TRAN-296........4.4 .......................35 TRAN-297........4.4 .......................35 TRAN-298........4.4 .......................35 TRAN-299........4.4 .......................35 TRAN-300........4.4 .......................35 TRAN-301........4.4 .......................35 TRAN-304........4.5 .......................37 TRAN-305........4.5 .......................37 TRAN-308........5.1 .......................38 TRAN-309........5.1 .......................38 TRAN-310........5.1 .......................38 TRAN-311........5.1 .......................38 TRAN-312........5.1 .......................38 TRAN-313........5.1 .......................38 TRAN-316........5.2.1 ....................38 TRAN-318........5.2.2 ....................38 TRAN-319........5.2.2 ....................38 TRAN-322........5.2.3 ....................39 TRAN-324........5.2.3 ....................39 TRAN-329........5.2.4 ....................41 TRAN-330........5.2.4 ....................41 TRAN-331........5.2.4 ....................41

LISA Pathfinder


of 78



TRAN-332 ....... 5.2.4....................41 TRAN-333 ....... 5.2.4....................41 TRAN-334 ....... 5.2.4....................41 TRAN-335 ....... 5.2.4....................41 TRAN-338 ....... 5.3.......................42 TRAN-339 ....... 5.3.......................42 TRAN-341 ....... 5.4.......................42 TRAN-343 ....... 5.5.......................42 TRAN-345 ....... 5.6.......................42

LISA Pathfinder


of 78



DOCUMENT CHANGE DETAILS

ISSUE CHANGE AUTHORITY CLASS RELEVANT INFORMATION/INSTRUCTIONS

A - - Initial Issue

B - - Update for PDR Pre-ITT Pack

C - - Update for Pre-TEB ITT Pack

Includes changes resulting from S2-EST-CR-2011 and closes PDR RIDs EL-096 & EL-098

1 - - EMITS Release

DISTRIBUTION LIST

INTERNAL

EXTERNAL

Astrium Ltd ESA CADM

Configuration Management