hlt 7000 optical transmitter product manual -...

HLT 7000Optical Transmitter

Product Manual

Document Part No: 700-0051910Revision D June 2001

Copyright © 2001 Harmonic Inc. ii

Safety

ATTENTIONAVERTISSEMENT

ACHTUNGPursuant to the pertinent sections of Title 21, (United States) Code of Federal Regulations (CFR), Chapter I, Subchapter J, and administered by the Center for Devices and Radiological Health (CDRH), operation under the Food and Drug Administration (FDA), this product, which produces or receives an optical signal, composed of Laser Radiation, complies with 21 CFR Chapter I, Subchapter J, as applicable to Class I Laser Products with a Class 3A Hazard.

Copyright 2000 Harmonic Inc.

Harmonic continues to improve and enhance all product designs. Specifications are subject to change without notice. Harmonic and logo design, eXchange, MAXLink, METROLink, NETWatch, PWRBlazer, TRANsend, and “Redefining the Network” are trademarks of Harmonic Inc. YAGLink and PWRLink are registered trademarks of Harmonic Inc. All other names are trademarks or registered trademarks of their respective owners.

INTENDED MEANINGSIGIFICATIONBEDEUTUNG

INTERNATIONAL SYMBOLSYMBOLE INTERNATIONALINTERNATIONALES SYMBOL

DANGER: Invisible Laser Radiation, when open or when operating with fiber disconnected. AVOID DIRECT EXPOSURE TO THE BEAM. Never oper-ate unit with a broken fiber or with a fiber connector disconnected.

DANGER: Les rayons laser sont invisibles à lóeil. NE PAS SÉXPOSER DIRECTEMENT AU RAYON. Ne jamais utiliser láppareil lorsque la fibre est interrompue ou Lorsqú un connecteur est endommagé ou déconnecté.

VORSICHT: Unsichtbare Laserstrahlung, wenn Abdeckung geöffnet oder Glasfaserkabel entfernt. DIREKTEN KONTAKT MIT DEM STRAGL VER-MEDIDEN. Das Gerät nicht einschalten, wenn das Glasfaserkabel beschädigt oder nicht angelchlossen ist.

CAUTION: There are no user serviceable parts inside. Refer all servicing to qualified service personnel. Other than those specific measurements, adjust-ments and tests specified in the manual, make NO attempt to modify or alter any circuit or assembly in any manner.

ATTENTION: Toute intervention sur cet équipement est formellement décon-seillée par le fabricant. En dehors de réglages décrits dans le manuel, lútili-sateur doit contacter une personne qualifiée par le fabricant pour toute modification ou réparation.

VORSICHT: Es sind keine zu wartenden Teile im Gerät, alle Wartungsarbe-iten nur von qualifiziertem Personal ausführen lassen. Ex dürfen nur die im Handbuch spezifisch aufgeführten Messungen, Justierungen und Tests vom Benutzer vorgenommen werden.Unter keinen Umständen, dürfen Modifika-tionen oder Änderungen jeglicher Art am Gerät unternommen werden.

NoteThis laser warning is included in all Harmonic manuals. The intended use of all Harmonic products, including those products that do not contain lasers, is in systems that contain lasers. Therefore this warning is important for the safety of all persons operating or main-taining the equipment.

!

Table of Contents

Table of Contents

Safety Warnings........................................................................................................................................... ii

Chapter 1 Overview1.1 About this Manual ...................................................................................................................1-11.2 Description ..............................................................................................................................1-11.3 Applications ............................................................................................................................1-3

Chapter 2 Installing the HLT 70002.1 Receiving and Inspection ........................................................................................................2-12.2 HLT 7000 Accessories ............................................................................................................2-12.3 Mounting the Unit in the HL 4200..........................................................................................2-22.4 Fiber Cable Connections .........................................................................................................2-32.5 Connecting the RF Broadband Input.......................................................................................2-42.6 RF Monitor..............................................................................................................................2-52.7 Connecting the Element Management System (EMS)(Optional) ...........................................2-52.8 Safety Feature for the MAXLINK Transmitter TTL Shut Down ...........................................2-6

Chapter 3 Power Up 3.1 Power Up.................................................................................................................................3-1

Chapter 4 User Interface Options 4.1 User Interface Options ............................................................................................................4-1

4.2 User Interface with HLT 7000 Front Panel .............................................................................4-14.3 User Interface with HL 4200 WD ...........................................................................................4-34.4 Transmitter Menus ..................................................................................................................4-34.5 User Interface with Netwatch Element Management System.................................................4-3

Chapter 5 Transmitter Setup 5.1 Transmitter Setup ....................................................................................................................5-1

5.2 Transmitter Setup Using the Transmitter Front Panel.............................................................5-25.3 Transmitter Setup Using the HL 4200 WD Display ...............................................................5-35.4 NETWatch Element Management System Setup....................................................................5-55.6 Performance Testing................................................................................................................5-5

Copyright © 2001 Harmonic Inc. iii

Table of Contents

Chapter 6 Maintenance6.1 Cleaning the Fiber Optic Connector........................................................................................6-16.2 Fan Replacement .....................................................................................................................6-36.3 In Case of Problems ................................................................................................................6-46.4 Warranty Summary..................................................................................................................6-56.5 Limitations of Warranty ..........................................................................................................6-56.6 Exclusive Remedies ................................................................................................................6-5

Appendix A Technical SpecificationsA.1 Optical Transmitter Performance ...........................................................................................A-1A.2 RF Input..................................................................................................................................A-1A.3 Optical Output ........................................................................................................................A-1A.4 User Interface .........................................................................................................................A-2A.5 NETWatch Element Management Interface...........................................................................A-2A.6 Environmental ........................................................................................................................A-2A.6 Physical ..................................................................................................................................A-2

Appendix BB.1 Assistance ............................................................................................................................... B-1B.2 Sales Office Listings .............................................................................................................. B-1

Copyright © 2001 Harmonic Inc. iv

Overview

Chapter 1Overview

1.1 About this ManualThis instruction manual is a guide to the HLT 7000 Series Optical Transmitter. It includes product diagrams and instructions for installing the HLT 7000 and connecting cables. It does not include the HLT 7X16 model.

• Chapter 1 gives general information about the HLT 7000.

• Chapter 2 describes how to install the HLT 7000.

• Chapter 3 shows how to power up the HLT 7000.

• Chapter 4 gives user interface options.

• Chapter 5 describes how to setup the transmitter.

• Chapter 6 covers maintenance and performance testing.

• Appendix A Technical Specifications

• Appendix B Sales office listings.

1.2 DescriptionThe HLT 7000 transmitter employs Harmonic’s Inc. patented complementary dual optical out-puts, allowing for redundancy and doubling the number of available links per transmitter. The externally modulated transmitter uses broadband electronic linearization, coupled with optical amplifiers and low fiber loss at 1550 nm. The HLT 7000 allows operators to extend the reach of their system while achieving excellent signal quality.

The HLT 7000 Optical Transmitter is a plug-in module used with the HLP 4200 fiber broad-band platform. The 5¼” rack mount housing is designed to simplify head end operation. The compact, stackable platform houses Harmonic’s PWRLink DFB transmitter, RF preamplifier, and Optical Switch with power supply modules, providing plug-and-play installation and operation. The MAXLink series modules have built-in element management capabilities when used with the Harmonic Element Manager (HEM) system and are ready for local or remote monitoring and control.

Key features of the HLT 7000 Transmitter includes:

• Dual optical outputs allowing for redundancy.

• Advanced broadband electronic linearization, coupled with Harmonic optical amplifiers.

• Low fiber loss at 1550 nm offers operators a fiber span in excess of 120 km, while achiev-ing excellent signal quality.

Copyright © 2001 Harmonic Inc. 1-1

Overview

• External modulation, thus insuring low noise and outstanding Composite Second Order (CSO) performance.

• Wide operating temperature range of 0° to 50° C, providing application flexibility.

• A 10-log rule for Composite Triple Beat (CTB) cascading with other network elements, permitting operators to reach a higher modulation index for better performance and longer reach.

• The modular HLP 4200 broadband fiber platform housing, providing a super luminescent alphanumeric display, with front panel control buttons allowing local monitoring and setting up of all transmitter operating parameters.

• Built-in local and remote connections allow control from the front panel or via remote monitor, lowering system management costs while increasing system reliability.

• “Plug-and-Play” operation, reducing time and cost of installation.

• Compact, stackable, modular packaging conserving head end space and simplifying maintenance.

• Complements Harmonic YAGLink and PWRLink transmitters.

• Transmitter dual outputs and an internally generated 39 Mhz pilot tone, used to enable the HLE 9700/3800 Link Extender for CNR improvement.

1-2 Copyright © 2001 Harmonic Inc.

Overview

1.3 ApplicationsThe HLT 7000 and the HOA 7000 form the MAXLink™ product line. The HLT 7000 Optical Transmitter is designed for use with HLP 4200 equipment platform. The MAXLink product is designed to meet the economic and technical requirements of broadband service providers. Typical applications include:

• Medium and long haul applications beyond the reach of 1310 nm transmitters.

• Fiber dense architectures.

• Redundant rings and broadcast layer transmissions.

• Hub interconnects.

Typical deployments of an HLT 7000 Optical Transmitter are shown in Figure 1- 1.

The HLP4200 Platform equipped with 1 HLT 7000 Optical Transmitter is shown in Figure 1- 2.

The HLT 7000 Optical Transmitter Signal Flow is shown in Figure 1- 3.

The front and rear panel features of the HLT7000 Optical Transmitter are shown in Figure 1- 4 and Figure 1- 5.

The modular design of the MAXLink product offers the user a number of advantages:

• The flexibility to add other plug-in modules, as industry requirements change, without the need to replace equipment shelves, power supplies or status monitor-ing equipment.

• The economic advantage of sparing plug-in modules rather than entire sub-systems.

• The ability to decrease the life-cycle cost of the equipment by means of an increased numerical count of spare plug-in modules.

• Reduced service outages based on the ease of plug-in module replacements, in contrast to “all in one” type systems.


Overview

Figure 1-1 Typical Deployments of Optical Transmitter

HLT 7000

HLT 7000 HLR 3000SM

HLR 3000SM

HLR 3000RM

HLT 7000

HLR 3000RM

HLR 3000RM


Overview

Figure 1-2 HLP 4200 Platform equipped with one HLT 7000 Optical Transmitter


Overview

Figure 1-3 HLT 7000 Optical Transmitter Signal Flow Diagram

Pre-distortionLinearizer

Linbo3

Modular

Fans

Laser

Enable/Disable

RearPanel

RF Input

Microprocessor/Controller

10.7 MHz Pilot

39 MHz Pilot

RF Power

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LED Indica

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1550nm

DFB

Laser EmissionIndicator


Overview

Figure 1-4 HLT 7000 Optical Transmitter Front Panel Features

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Overview

Figure 1-5 HLT 7000 Optical Transmitter Rear Panel Feature


Installing the HLT 7000

Chapter 2Installing the HLT 7000

This chapter describes:

• Receiving and inspecting the HLT 7000.

• HTL 7000 Accessories.

• Mounting the Unit in the HLP 4200 Platform.

• The Fiber Cable Connections.

• The RF Broadband Input.

• The RF monitor.

• Connecting the Element Management Systems (EMS).

• Safety Features for the MAXLINK Transmitter; the TTL Shut Down.

2.1 Receiving and InspectionWhen unpacking the unit, inspect the shipping container and equipment for damage. Save the shipping material for future use.

If the container or the equipment is damaged, notify both the freight carrier and Harmonic Inc.

2.2 HLT 7000 AccessoriesThe following tools accessories are provided with the HLT 7000:

• 1 meter SC/APC jumpers with 2ea. protective caps.

• HLT 7000 Manual.

• The Male GSK - Female F adaptor for RF Monitor port.

• The Fiber cleaning kit.

WARNING! To protect the operator and the equipment, do not perform any operational tests if the equipment appears to be damaged.



2.3 Mounting the Unit in the HLP 4200 PlatformThe HLT 7000 module is a plug-in module that you can insert into any desired posi-tion in an HLP 4200WD / ND platform. Modules are designed to be inserted into and removed from an HLP 4200WD / ND platform that is both powered and operational, or not powered.

For the HLP 4200 WD platform, the HLT 7000 is a plug-in module that is simply inserted into the desired shelf position. Lower the control/display panel on the HLP 4200 WD platform and slide the module into any slot that is available.

For the HLP 4200 ND option, slide the module into any available slot. Any slot in the shelf can accommodate the unit. Once the module is seated, lock the unit into position by using the knurled lock screws shown in Figure 2-1.

Figure 2-1 Front Panel HLP 4200 Platform

CAUTION! If the platform is already in service, do not TURN OFF the power to the platform when installing the HLT 7000 or service will be interrupted.

knurled lock screws

knurled lockscrews



2.4 Fiber Cable ConnectionsEach Optical Transmitter is supplied with an accessory kit that includes two (2) SC/APC fiber jumpers.

• When cleaning ends or connectors, never look directly into the beam path, even if you think the laser is off.

• Never look directly into the face of the fiber using optical viewing devices such as magnifying lenses or eye loupes.

• Always view the fiber end from a side angle to avoid focusing the laser beam through the magnifier. Optical viewing instruments will signifi-cantly increase the radiation hazard to your eyes.

For optical installation follow the steps below:

1. Make sure the laser ON/OFF switch at the back of the module is turned OFF.

2. Remove the plastic cover from the SC/APC connectors and store them in a clean plastic bag for future use.

3. Loosen the locking screw and move the safety shutter. See Figure 2-2.

4. Remove the protection covers from the connectors or the back panel connectors.

5. Carefully insert the plug into the optical connector at the rear panel of the module. Push the plug in until a click sound is heard.

Figure 2-2 Safety Shutter

DANGER!Invisible laser radiation when open or fiber disconnected. Avoid direct exposure to the Laser Beam. Direct viewing of the beam can cause serious eye damage and possible loss of vision.

NOTE!Never operate the system with the fiber disconnected or broken.!

NOTE!Whenever a connector is opened, a plastic dust cover must beplaced over it.

!

after connector is insertedLoosen then tighten

ConnectorLocking Mechanism

ConnectorRestrain

Move Back



2.5 Connecting the RF Broadband InputThe Optical Transmitter module is connected to the broadband RF source by means of a 75 ohm impedance coaxial cable terminated with a male “F” type connector. Install the “F” connector to the coaxial cable according to the instructions that accom-pany the “F” connector.

Connect the prepared coaxial cable to the female “F” connector marked “RF IN” located on the back panel of the module. Refer to Figure 2-3.

Figure 2-3 HLT 7000 Transmitter shown connected with HOA 7000 Amplifier

NOTE!To ensure performance integrity, use coaxial cable with 0.025” to 0.032” center conductor diameter.

!

HLP 4200 Platform



2.6 RF MonitorThe RF monitor test connector located on the front of the module provides a conve-nient means for measuring the level of the RF drive signal to the Optical Transmitter. This measurement is taken directly before the signal is inputted into the modulator. It is not the input signal level into the back panel.

2.7 Connecting the Element Management System (EMS) (Optional)From the EMS computer, connect the serial port to one of the DB9 pin connectors on the HLP 4200 platform or the 25 pin connector on the HLP 2000 platform. Connect the RJ-11 telephone cord between the HLP 4200 platform and other Harmonic equip-ment that supports a RS-485 data interface. (See the HLP4200 Instruction Manual).



2.8 Safety Feature for the MAXLINK Transmitter: TTL Shut Down

The ability to turn off the output of the MAXLink Transmitter can be accomplished by applying an external TTL signal at the rear of the transmitter.

TTL Shut Down of Laser

1. Apply +5v and ground to the rear panel connector as directed in Figure 2-4. This will disable the laser in the transmitter.

Figure 2-4 Transmitter Rear Panel

2. The Alarm status display will read “Laser Disabled by Rear/External Switch” when the transmitter is shut off.

1. From the HLP 4200 system menu, select <Transmitter>.

2. Next select <Transmitter Status> and press Enter.

3. Then press <Enter> or the down arrow key < ∨ > until the message “Override External Switch ON” <Set+UP/DN> is displayed.

4. Then, holding the SET button in, use the UP or Down < ∧ ∨> arrow key to turn the Switch OFF.

Grn+5v

NOTE!To remove the override shut down, it is necessary to use the following steps.!


Powering Up

Chapter 3

Power Up

This chapter covers:

• Power start up.

• HLP 4200 System Ready flow chart.

3.1 Power UpNever operate the system with fiber disconnected or broken.

• Never look directly into the face of the fiber using optical viewing devices such as magnifying lenses or eye loupes.

• Always view the fiber end from a side angle to avoid focusing the laser beam through the magnifier.

• Optical viewing instruments will significantly increase the radiation hazard to your eyes.

DANGER! Avoid direct exposure to the Laser Beam. Direct viewing of the beam can cause serious eye damage and possible loss of vision. Invisible laser radiation present when fiber is open or fiber disconnected.

NOTE!When cleaning ends or connectors, never look directly into the beam path, even if youthink the laser is off.

!

CAUTION!If the platform is already in service, do not TURN OFF the power to the platform wheninstalling the HLT 7000 or service will be interrupted.


Powering Up

1. If this is an initial installation depress the power button on the power supply (Normally, this would be the CPS 4200 power supply installed in the HLP 4200 platform).

2. Turn ON the laser ON/OFF switch in the back.

3. If the unit is operating normally with proper input power, the status LED on the front panel will illuminate green.

The HLP 4200 WD (with display) will read “HLP 4200 SYSTEM READY” message as shown in Figure 3-1. The operator can then walk through the transmitter menus by following the steps described in the following:

1. Depressing any key on the front panel will show a message on the front panel that reads “MODULE SECTION”.

2. Pressing <ENTER> when the above message is shown leads the operator to a menu displaying a list of connected modules by using <UP> and <DOWN> keys from the keyboard.

The module messages show the module position as the first field in the message, the left most being number 1. The select LED of the currently selected module is illuminated.

When the transmitter being installed is displayed on the front panel, pressing <ENTER> will lead the operator to the transmitter menus.

3. Refer to the User Display Interface Chart Figure 3-1.

NOTE!This module has been designed so it may be plugged in while the platform is powered on.!

3-2 Copyright ©2001 Harmonic Inc.

Powering Up

Figure 3-1 HLP 4200 Platform, User Display Interface Chart

HLP 4200 SYSTEM READY

ANY KEY

MODULE SECTION

ESC

ADDRESS:XXXX <ENTER> TO CHANGE

ENTER (W/CHANGE) ESC (NO CHANGE) ENTER

ADDRESS:XXXX <SET>+<UP/DOWN> TO CHANGEESC

SET + UP/DOWN TO CHANGE ADDRESS

ENTER

ENTER

Module Selection

Note:

Alarmed Module will always be displayed first.

POSITION: (1-6) NAME MODEL (BUS MASTER OR bLANK)

-1 to 6


Powering Up

3-4 Copyright ©2001 Harmonic Inc.

User Interface Options

Chapter 4User Interface Options


• User Interface Options.

• The User Interface with HLT 7000 Front Panel.

• The HLP 4200 WD (optional Display) and Keyboard.

• User Interface with NETWatch Element Management System.

• Transmitter Menus.

4.1 User Interface OptionsThe transmitter provides three types of options for the User Interface. The different options are dependent upon the type of system configuration the customer has acquired. A brief description of each option is given.

4.2 User Interface with HLT 7000 Front PanelThe Interface from the front panel of the transmitter provides the capability to set up the transmitter. This is achieved via a four position switch (AGC, Remote, MGC and Pilot) in conjunction with an RF step attenuating adjustment switch.

Setup SwitchThe four setup switch positions are AGC, Remote, MGC and Pilot. The Mode switch should be in the “Remote” position. The function of each switch position is listed below and is shown in Figure 4-1.

• Automatic Gain Control (AGC)This position Automatically Controls the Gain of the RF signal within a range of -10dB. The AGC mode is recommended when the corresponding receiver in the system is operating in AGC mode and the channel loading is constant. The “Auto” LED lights up when the Setup switch is in AGC Mode.

• Remote ModeThe system state and pad levels are controlled by the platform controller through the HLP 4200 WD buttons/display and/or the NETWatch Element Management System Software. The step adjuster is disabled in the remote mode position.

• Manual Gain Control (MGC)This position is used in conjunction with the Step Adjust Switch during the initial setup of the system. MGC allows the RF input signal level to be optimized for a given set of system performance requirements.



• Pilot ModeThis position is used in conjunction with the Step Adjust Switch during initial setup. The pilot level should be set at 10 dB below the carrier level. This can be determined by means of a spectrum analyzer connected to the RF Monitor Port on the front of the HLT 7000.

Step Adjust SwitchThe adjuster switch is used in conjunction with the Setup switch to adjust the RF and Pilot pads. The adjustable step attenuator has 10 steps for each full turn of the screw-driver. Each step is equal to 0.1 dB and each full turn equals 1 dB.

There are three LEDs on the front panel. The “Status” LED is illuminated red when there is an alarm on the unit, otherwise it is illuminated green. The “Select” LED is illuminated whenever the module is selected via the front panel of the HLP 4200WD. The “Auto” LED is illuminated if the RF level control is in AGC mode.

Figure 4-1 Functional Diagram for the Four Position Setup Switch

HLP 4200



4.3 User Interface with HLP 4200 WDThe HLT 7000 module’s operation can be conveniently set up, monitored and modified via the interface with the HLP 4200 display. This section describes the Status, Diagnostics, Adjustment, and Alarm user interfaces to the HLT 7000. Refer to Figure 4-2, User Inter-face Chart, that shows the user interface and how to use it.

4.4 User Interface with NETWatch Element Management SystemHarmonic Inc. provides a complete Element Management System. All controls and parameters can be monitored and controlled locally via the front panel or remotely using the NETWatch Element Management System. (See NETWatch Element Management Manual).

4.5 Transmitter MenusStatus

This menu enables the operator to obtain the serial number, firmware version and informa-tion regarding switch positions and operating mode parameters.

DiagnosticsThis menu enables the operator to diagnose the Laser, RF system power, and Thermal operating conditions.

Adjustment

This menu allows the operator to adjust the transmitter to different operating conditions to suit the customers special needs.

AlarmsThis menu displays the active alarms of the transmitter.


��

Copyright 2001 Harmonic Inc. 4-5Display User Interface Chart

TO HLP4200 MAIN MENU

LEVEL 0

LASER SYSTEMEN TER

R F SYSTEMEN TER

M O DU L ATOR SYSTEM

<EN TER > TO EXIT T RAN SM ITTERD IAG N O STIC S

EN TER

TEM PER ATU R E C O N TR O L SYSTEMEN TER

PO W ER SYSTEMEN TER

ESC

EN TER

-5 V D C SU PPLY ALAR M

-3 V D C SU PPLY ALAR M

R F SIG N AL LO W , C H EC K R F IN PU T

R F GAIN T OO H IG H , C H EC K R FM O NITO R

R F GAIN T OO LO W , CH EC K R FM O NITO R

N O ALAR M S

<EN TER > TO EXIT T RAN SM ITTERALAR M S

EN TERESC

SBS ALAR M

+15 V D C SU PPLY ALAR M

R F -15 V DC SU PPLY ALAR M

-1 5 V D C SU PPLY ALAR M

EN TER

LASER TEM P ER R O RO U T O F TO LER AN C E

LASER C UR R EN T ER R ORO U T O F TO LER AN C E

FAN ALAR M , CH EC K FAN

SYSTEM T EM P. T OO H IG H

LASER D ISABLED BY R EAR PAN ELSW ITC H

EO M BIAS N O T O PTIM AL

24 V DC SU PPLY ALAR M

LASER SYSTEM O FF, TEM P TO O H IGH

LASER SYSTEM O FF, TEM P TO O LO W

LASER POW ER BELO W N OR M AL

EN TER

EN TER

EN TER

EN TER TR AN SM ITTER STATU S

TR AN SM ITTER D IAG N O STICS

TR ANSM ITTER AD J UST M EN TS

TR ANSM ITTER AL AR M S

ESC

O VER ID E EXTER N ALSW ITC H :OF F<SET+U P/D N >

<EN TER > TO EXIT T RAN SM ITTERSTATU S

EN TER

SETU P SW ITC H PO SIT IO N : AG C /R EM OT E/M G C /PILO T

R F GAIN C O N TR O L M O D E:AG C/M G C

R F PAD= XX.X dB. P ILO T PAD =XX.X dB

R F PAD VALU E AT FAC TO R Y SETTING= XX.XdB

EN TERESC

LASER W AVELEN G TH =XXXX.XXN M

1550 N M T RAN SM ITTER S/N =XXXXX

FIR M W AR E VER SIO N : 1 .00

LASER SW ITC H : O N /O FF

LEVEL 1

<EN TER > TO EXIT R F D IAGN O STIC S

EN TER

EN TERESC

R F HEAT SIN KTEM PER ATU R E = 30.0 oC

<EN TER > TO EXIT PO W ER SYSTEMD IAG N O STIC S

EN TER

PO W ER SU PPLY (15 V): 15 .9 V

PO W ER SU PPLY (15 V RF ): 15.9 V


EN TERESC


PO W ER SU PPLY (-3 V): -3 .1 V

PO W ER SU PPLY (-5 V): -4 .9 V

PO W ER SU PPLY (-15 V): -12.4 V

EN TERESC

<EN TER > TO EXIT M O D U LATO RD IAG N O STIC S

EN TER

O U TPU T PO W ER 1: XXm W (XX.X dBm )

O U TPU T PO W ER 2: XXm W (XX.X dBm )

EN TERESC

<EN TER > TO EXIT T EM P C O N TR OLD IAG N O STIC S

EN TER

FAN SPEED LEVEL: LO W

R F HEAT SIN KTEM PER ATU R E = 30.0 oC

<EN TER > TO EXIT R F AD JU STM EN T

PILO T LEVEL SH O U LD BE 10dBBELO W C AR R IER

PILO T PAD =XX.X d B,<SET+U P/D N > TO C H AN GE

EN TERESC

R F PAD = XX.Xd B<SET+U P/D N > TO C H AN GE

EN TER

SW ITC H ED TO FAC TO R Y SETT IN G S<EN TER > TO EXIT

EN TER

R F GAIN C O N TR O L M O D E:AG C /M G C <EN TER >

<ESC > TO ABO R T OR <SET+U P/D N >TO S W ITC H

SETTIN GS N O T C H AN G ED <EN TER > TO EXIT

EN TERESC

N O TE: ALL SE TTIN G S W ILL BEC H AN G ED <EN TER >

EN TERESC

SBS 1=160 <G AIN >,<SET+U P/D N > TOC H AN G E

SBS 2=130 <G AIN >,<SET+U P/D N > TOC H AN G E

<EN TER > TO EXIT SBS C O N TR O LAD JU STM EN T

EN TER


EN TER

AG C C O N TR O L<SET+U P/D N > FO R M G C

EN TER

ESC


EN TER

R F PAD = XX.X dB<SET+U P/D N > TO C H AN GE

PILO T LVL SH O U LD BE 10 dB BELO WC AR R IER

PILO T PAD = XX.X dB<SET+U P/D N > TO C H AN GE

EN TERESC

R F GAIN C O N TR O L M O D E: AG C /M G C

IF SETU P SW ITC H "R em ote "

IF SETU P SW ITC H N O T "R em ote"

ESC

AD JU ST R F LEVELEN TER

SBS C ON TR O L AD JU STM EN TSEN TER

SW ITC H TO FAC TO R Y S ETTIN G SEN TER

EN TER

<EN TER > TO EXIT T RAN SM ITTERAD JU STM EN TS

<EN TER > TO EXIT L ASER SYSTEMD IAG N O STIC S

EN TER

BIAS C U R R EN T=170.0 m AVO LTAG E=X.XX V

LASER TEM P = 25.0 oC TEC ooler l = -20 0 m A

EN TERESC

LASER POW ER = 11 .5 m W (10 .6 dBm )

LEVEL 3

IF SETU P SW ITC H N O T "R em ote"

IF SETU P SW ITC H "R em ote "

LEVEL 2

POSSIBLE ALARMM ESSAGES

NOTE: IF UNIT ISIN ALARM , THEHIG HEST PRIORITYALARM W ILL APPEARFIRST AND BYPASSTHE M AIN (LEVEL 0)M ENU.

IF CHA NGE CA RRIED T HROU GH

IF CHA NGE A BORT ED

SW ITC H ED TO FAC TO R Y SETT IN G S<EN TER > TO EXIT

EN TER

SELEC T R F G AIN C O N TR O L M O D EN EXT <EN TER >

M G C C O N TR OL<SET+U P/D N > FO R AG C

<ESC > TO ABO R T OR<SET+U P/D N >TO SW ITC H

EN TERESC

N O TE: ALL SE TTIN G S W ILL BEC H AN G ED <EN TER >

SETTIN GS N O T C H AN G ED <EN TER > TO EXIT

IF CHA NGE CA RRIED T HROU GH

IF CHA NGE A BORT ED

��

Copyright 2001 Harmonic Inc. 4-6 Display User Interface Chart

Transmitter Setup

Chapter 5Transmitter Setup


• Factory Setup of the Transmitter.

• The Transmitter Front Panel.

• Transmitter Setup with HLP 4200 WD Display.

• NETWatch Element Management System Setup.

• Performance Testing.

5.1 Transmitter Setup

The Transmitter is factory set to provide optimal performance for 80 NTSC or 80 Pal channel loading and an RF level of 18 dB mV/ch. The RF level can be adjusted to provide alternative performance characteristics defined by the operator.

Availability of the options is dependent upon the type of system configuration the cus-tomer has acquired. The transmitter setup can be changed by using any of the following three options:

• Setup using the Transmitter Front Panel.

• Setup using the HLP 4200WD platform.

• Setup using the NETWatch Element Management System Software.

If the front panel Setup switch is in any position other than “Remote” then the RF level control method will be defined by the front panel position switch.

If the front panel setup switch is in the “Remote” position, then the RF level control method will be defined by either the front panel display or the NMS can be used to choose between AGC and MGC.

The front panel Step Adjust switch is active only when the Setup switch is in the “MGC” or “PILOT” positions.


Transmitter Setup

Each setup interface allows the operator the following two options:

1. Keep the total RF input power to the electronics constant within its control range irrespective of the RF level and number of channels injected in the transmitter.

2. Let the RF level into the electronics vary in case the RF input level input into the electronics varies.

The two methods of RF level control are hereafter described as Auto Gain Control (AGC) and Manual Gain Control (MGC) respectively. Alternate terminology used in this document for AGC and MGC modes are Auto and Manual respectively.

5.2 Transmitter Setup Using the Transmitter Front Panel

To automatically adjust the RF level in the unit, move the front panel setup switch to AGC position. See Figure 1-4.

To manually set the value of the RF Pad, move the front panel select switch to the MGC position and use the step adjuster to change the RF Pad value to the desired attenuation.

To adjust the value of the Pilot Pad, move the Setup switch to Pilot position and use a screwdriver to adjust the step adjuster (marked Setup), to change the setting of the Pilot attenuator. After adjustments are completed, the switch should be moved to the “Remote” position.

To change the RF Level control to AGC move the switch to “AGC” and back to “Remote.” To change the RF control to MGC, move the switch to “MGC” and then to “Remote.”

Each clockwise movement of the step adjust switch increases the attenuation by 0.1 dB. Each counter clockwise movement decreases the applicable attenuator as deter-mined by the position of the front panel Setup switch, by 0.1 dB.

Once the desired setting has been reached, move the switch to the “Remote” position. This will disable the setup switch and prevent any in-advertent changes.

NOTE!Leaving the switch in any position other than “Remote” will prevent all other setup interfaces from changing the method of RF level control.!


Transmitter Setup

5.3 Transmitter Setup Using the HLP 4200 WD Display

Using the Transmitter Display menu, scroll to the Transmitter Adjustments menu and press <ENTER>.

The Setup Menu allows the operator either to make adjustments to the RF and Pilot Atten-uators or to set the attenuators to factory values.

Adjust the RF and Pilot Levels

Pressing <ENTER> while the following menu choice is being displayed will lead to two different menus depending on the position of the Setup Switch at the front panel.

If the Setup Switch is in the “Remote” position, the operator can choose the RF Gain Control mode by using <SET+UP/DN> while the first item of the following menu is displayed.

“MGC/AGC CONTROL <SET+UP/DN>FOR AGC/MGC”

“<ENTER> TO EXIT RF ADJUSTMENT”

Pressing <ENTER> after selecting the correct mode of operation displays the following menu.

“RF PAD=XX.X dB <SET+UP/DN> TO CHANGE”

“PILOT LVL SHOULD BE 10 dB BELOW CARRIER”

“PILOT PAD=XX.XdB <SET+UP/DN> TO CHANGE”

“<ENTER> TO EXIT RF ADJSUTMENT”

• If the Setup switch is in a position other than “Remote”, its position will automatically determine the gain control mode. The following menu will be displayed when press-ing <ENTER>.

“RF GAIN CONTROL MODE: AGC/MGC”

“RF PAD=XX.X dB <SET+UP/DN>TO CHANGE”

“PILOT LVL SHOULD BE 10 dB BELOW CARRIER”

“PILOT PAD=XX.X dB <SET+UP/DN>TO CHANGE”

“<ENTER> TO EXIT RF ADJSUTMENT”

The difference between the above two menus is the additional line in the second menu that simply reminds the operator about the active RF gain control mode.


Transmitter Setup

In the AGC mode of operation, the RF input level supplied to the unit is kept constant by changing the RF PAD as needed. The pilot level is maintained at 10 dB below the carrier level.

In the Manual mode of operation, the RF and Pilot Pad settings are maintained at whatever level they were left by the operator.

In either mode of operation, the RF Pad setting can be modified by using the <SET+UP/DN> key combination while the following menu item is displayed.

“RF PAD=XX.X dB<SET+UP/DN>TO CHANGE”

The next item in the menu is an advisory note to the operator to set the Pilot Pad such that the Pilot level is 10 dB below the carrier.

The next menu item shown below allows the operator to change the setting of the Pilot Pad.

“PILOT PAD=XX.X db <SET+UP/DN>TO CHANGE”

If the pilot signal is not desired, the Pilot Pad can be increased to 99.9 db.

Factory Settings Recall

Pressing <ENTER> at the “Switch to Factory Settings” menu will display one of the following two choices, (1) Remote or (2) any other position then remote, to the opera-tor depending upon the position of the Setup switch on the front panel.

1. If the Setup switch is in the “Remote” position the following menu will be dis-played.

“NOTE: ALL SETTINGS WILL BE CHANGED<ENTER>”

“SELECT RF GAIN CONTROL MODE NEXT<ENTER>”

“MGC/AGC CONTROL <SET+UP/DN>FOR AGC/MGC”

“<ESC> TO ABORT OR <SET+UP/DN> TO SWITCH”

• If settings change abort.

“SETTINGS NOT CHANGED <ENTER> TO EXIT”

• If settings were changed.

“SWITCHED TO FACTORY SETTINGS”


Transmitter Setup

2. If the Setup switch is in any position other than the “Remote” position, the following menu will be displayed.

“NOTE: ALL SETTINGS WILL BE CHANGED <ENTER>”

“RF GAIN CONTROL MODE: AGC/MGC”

“<ESC> TO ABORT OR <SET+UP/DN> TO SWITCH”

• If settings change abort.

“SETTINGS NOT CHANGED <ENTER> TO EXIT”

• If settings were changed.

“SWITCHED TO FACTORY SETTINGS”

The main difference between the two menus is that while the first menu permits the opera-tor to choose the RF Gain Control mode, the second menu will automatically assume the mode determined by the Setup switch at the front panel.

Pressing <ESC> at any point will nullify any changes made.

The system factory setting is optimized for:

MGC - 80 NTSC STD Channels input @ 18 dBm V per channel.

5.4 NETWatch Element Management System Setup.

Harmonic provides a complete Element Management System. All controls and parameters can be monitored and controlled locally or remotely. See the NETWatch Element Management System manual.

5.5 Performance Testing

If desired, after the HLT 7000 has been installed, performance testing can be conducted according to the NCTA Recommended Practices for Measurements on Cable Television Systems, Revision of Section 1 of FCC Technical Standards.

NOTE!The AGC setting will be within 1 dB of the optimum setting for any number of channelsbetween 60 and 110 channels and is recommended as a starting point for unit setup.

!


Transmitter Setup


Maintenance

Chapter 6Maintenance

This chapter describes how to:

• Clean the Fiber Optic Connector.

• Fan Replacement.

• What to do in case of Problems.

6.1 Cleaning the Fiber Optic Connector

As a rule, clean the mating connector before connecting it to the transmitter. Clean the Transmitter connector as well. The cleaning procedure of the transmitter connector is explained in steps 1 through 6. Refer to the Figure 6-1.

1. Turn off the transmitter.

DANGER!Invisible laser radiation when open or fiber disconnected. Avoid direct exposure to the Laser Beam. Direct viewing of the beam can cause serious eye damage and possible loss of vision.


Maintenance

2. Remove the optical connector plate (including the shutter) by unscrewing the two screws. See Figure 6-1.

Figure 6-1 Optical Connector Plate Screws

3. Pull the plate away about 3” maximum to prevent breakage of fiber and release the optical connector from the adaptor.

4. Fold a piece of dry lens cleaning paper in half twice to obtain a 4 ply thickness.

5. Lay the connector on the lens cleaning paper with the tip touching the paper. Pull the connector across the paper to wipe the tip.

6. If necessary, use one drop of High Grade Isopropyl Alcohol to wet part of the paper. Drag the connector across the wet area to reduce residue on the connector surface. Then drag the connector tip across the dry area.

7. Assemble the connector back to the adaptor plate. Assemble the plate back to the transmitter back panel. The mating optical connector has to be cleaned as explained in steps 6 through 7.

Optical Plate Screws

WARNING!Never use a clean air product to spray air into the optical adapter or on the connector end surface. The air causes dust to condense on top of the optics waveguide that is very difficult to remove. Never clean a connector when laser light is passing through it.


Maintenance

6.2 Fan Replacement

Should a fan failure occur, disconnect the power cable and remove the four Phillips head screws securing the fan to the module housing. Replace the failed fan unit with a new fan unit. Secure the new unit with the four Phillips head screws and reconnect the power cable. See Figure 6-2.

Figure 6-2 HLT 7000 Optical Transmitter Rear panel Features


Maintenance

6.3 In Case of Problems

Should a problem occur, contact the Harmonic Customer Service Department at (800-730-4099). A service technician will assist you in determining whether or not a fault exists with the unit. A Return Material Authorization (RMA) Number will be issued for any faulty unit that needs to be returned. Note this number on the shipping con-tainer and all correspondence.

The return address is:

Harmonic Inc.549 Baltic WaySunnyvale Ca. 95054Atten: Customer Service RMA no._____________


Maintenance

6.4 Warranty Summary

This Harmonic Inc. hardware product is warranted against defects in material and workmanship for thirty-six (36) months from the date of shipment. Harmonic Inc. will, at its option, either repair or replace products that prove to be defective.

We shall have no liability or responsibility to the customer or any other person with respect to any loss or damage caused or alleged to be caused directly or indirectly by equipment or software sold or furnished by us. Read instructions carefully. No liabil-ity will be assumed for any damage caused by improper installation.

The information in this document is subject to change without notification. The con-tent of this document is protected by copyright. No part of this document may be reproduced or copied by any means without the permission of Harmonic Inc.

For warranty or repair, return this product to a service facility designated by Harmonic Inc. The Buyer shall prepay shipping charges to Harmonic Inc., and Harmonic Inc. shall pay shipping to return the product to the buyer. However, buyer shall pay all shipping charges, duties and taxes for products returned to Harmonic Inc. from another country.

Harmonic Inc. warrants that its software, as well as firmware designated by Harmonic Inc. for use with the product, will execute its programming instructions when installed properly.

Harmonic Inc. does not warrant that the operation of the product or software or firm-ware will be uninterrupted or error free.

6.5 Limitations of Warranty

The foregoing warranty shall not apply to defects resulting from abuse, neglect by the Buyer, improper installation or application by the Buyer, the Buyer-supplied software or interfacing, unauthorized modification or misuse, operation outside of the environ-mental specifications for the product or improper site penetration or maintenance.

No other warranty is expressed or implied. Harmonic Inc. specifically disclaims the implied warranties or merchantability and fitness for a particular purpose.

6.6 Exclusive Remedies

The remedies provided herein are the Buyer’s sole and exclusive remedies. Harmonic Inc. shall not be liable for any direct, indirect, special, incidental or consequential damages, whether based upon contract, tort or any other legal theory.


Maintenance


Appendix A

Appendix ATechnical Specifications

The specifications in this appendix cover the standard HLT77xx and HLT78xx models. For HLT models that have been specially tuned for certain applications please refer to the specific data sheet for that model.

A.1 Optical Transmitter Performance

A.2 RF InputInput level range: 18 to 28 dBm V per channel (typical)Operational bandwidth: 40 to 870 MHzRF attenuator adjustment range: 10 dBImpedance: 75 OhmReturn loss:>16 db to 870 MHzConnector type: Standard F, RG-59 cable type(accepts 0.64 - 0.8 mm center conductor diameter.)

A.3 Optical OutputNumber of outputs: 2

Connector type: SC/APC (FC/APC optional)Wavelength: 1550 mm ± 15 nm

Parameter Model

HLT 77xx HLT 78xx

Channel Load: 80 M NTSC 80 B/G PAL

Frequency Response (±0.5 dB): 45-870 MHz 45-870 MHz

Composite Second Order (CSO): -65 dBc -63dBc

Composite Triple Beat (CTB): -65 dBC -63dBc

CNR @ 0 dBm received power 53.5 dB 51 dB

Model Output Power Per Fiber

Unit dBm MW

HLT 7x06 6 dBm (4 mW)

HLT 7x09 9 dBm (4 mW)

HLT 7x11 11dBm (4 mW)

Copyright © 2001 Harmonic Inc A-1

Appendix A

A.4 User InterfaceFront panel

Bi-state status LED:Normal = Green, Alarm = Red

Module section indicator: Yellow LEDAuto LED: Auto = YellowAlarms (See list of alarms)Function side switch and setup adjustment:

AGC, Remote, MGC, Pilot.Monitor point

Flatness: ±1 dBReturn loss:>16 dBConnector type: Male GSK(female F-type adapter included)

Rear panelLaser Enable/Disable SwitchYellow LED Lights when enabled

A.5 NETWatch Element Management InterfaceEMS interface: By means of a HLP 4200 platformEMS data rate: 9.6 kb/sEMS carrier: 10.7 MHz (internally generated)CNR enhancement pilot: 39.875 MHz Pilot (Internally Generated)Power RequirementsNominal: 23 - 26 VDC - supplied by HLP 4200 power bus Consumption: 65 Watts maximumCurrent: 2.7A

A.6 EnvironmentalOperating temperature range: 0° to 50° C (+32° to 122° F)Storage temperature range:

-40° to +70° C (-40° to +158° F)Relative humidity: Maximum 85% non-condensing

A.7 PhysicalDimension: 5.233” W x 4.37” H x 10.7” DWeight: 8 lbs.Mounting: HLP 4200 platform - two module slots wide

Copyright © 2001 Harmonic Inc A-2

Appendix B

Appendix BHarmonic Inc. - Offices

B.1 Assistance:For technical support and customer service, call toll free: 800.730.4099.Harmonic’s Web address is www.harmonicinc.com.

B.2 Sales Offices

Harmonic Inc. (U.S.A)Corporate Headquarters549 Baltic WaySunnyvale, CA 94089Tel: 1.408.542.2500Tel: 1.800.788.1330Fax: 1.408.542.2510

Harmonic Inc. (U.S.A)U.S. Technical SupportTel: 1.800.730.4099Fax: 1.408.542.2521

Harmonic Inc. (U.S.A)U.S. Return Materials AuthorizationTel: 1.408.542.2621

Harmonic EuropeBessenveldstraat 25 AB-1831 DiegemBelgiumTel: +32.2.716.4881

Harmonic - Latin America1221 Brickell Avenue, Suite 939Miami, Florida 33131Tel: 1.305.995.8299Fax: 1.305.995.8298

Harmonic (U.K.) Ltd.Unit #17, Alban park, Hatfiedl Rd.St. Albans, Herts., AL40JJUnited KingdomTel: +44.1727.853855Fax: +44.1727.853558

Harmonic Inc. Singapore10 G Begonia Dr.Singapore 8009870, SingaporeTel: +65.481.4446Fax: +65.484.0343

Harmonic International Inc.No. 149, Shaoshanbei RoadTongcheng Int’l Hotel, Suite 1205Changsha, Hunan ProvinceP.R. China, 410 011Tel: +86.731.412.1208Fax: +86.731.412.057

Harmonic Limited (Asia Pacific)

Suite 703-704, CMG Asia TowerThe Gateway, 15 Canton RoadTsimshatsui, Hong KongTel: 852-2116-1119Fax: 852-2116-0083

Harmonic Inc. Europe Continental Sq. 4 Place de Londres BP1078195727 Roissy CDG CEDEX, FranceTel. + 33.1.48.62.9.212Fax. + 33.1.48.629.236

Copyright © 2001 Harmonic Inc B-1

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