Download - Status of the LAV electronics
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Status of the
LAV electronics
G. Corradi, C. Paglia, D. Tagnani
F. Gonnella,
M. Raggi INFN LNF
Photon Veto WG
CERN 13/12/2011
new
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OUTLINE
Status of the FEE boards for the LAVTools for testingThe LAV to TDC cablesAnalog cablesStatus of the LAV electronics massive production
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The LAV 9U FEE board1 2
3
4
4
3
Supply voltage ±12V reduced to ±7.5V by onboard voltage regulators
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LAV boards connections
9U Boards components # of pieces
±7.5 V voltage regulator 2
Time over threshold Mezzanine (2ch) 16
Sum of 4 mezzanines (8 sum 4 + 2 sum 16) 10
Board controller 1
Test pulse signal generator 1
Boards Inputs Type Outputs TypePower ±12V VME J1 64 LVDS output 2xSCSI232 analog signals
2xDB37
8 analog sums of 4 ch 8xLEMO-00
2 analog sum of 16 ch 2xLEMO-00
1 CAN OPEN RJ11 1 CAN open RJ11
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Test toolsAllows to access ToT mezzanine top and bottomCan control the value of the 4 thr using trimmersAccess to analog and digital mezzanine outputs
Set using trimmers a common value for the high and low thresholds on all the boardchannels
Allows to operate the boards without the CPU firmware
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Connection to TDC
TDCb sideVHDCI
LAV FEE sideSCSI II
VHDCI to SCSI II 1.5m halogen free cableNon standard pin to pin assignment!Produced by Technical Cable ConceptsPrice 85$ per piece
All basic tests are up to now satisfactory
Warning:Don’t use any other cable with the LAV FEE and TDCb.The pin assignment will be wrong!!Warning:If you plan to produce patch panels ask for pin assignment firts!!
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ANTI-A12 analog cable test
Reflected Signal Amplitude = +80mVDirect Signal Amplitude = -1.252VCable Impedance Z0 = 44 Ohm
Due to non halogen free cable used inside the construction of the ANTI-A1-
A11A new cable type is needed for A12
Firm already asked for a new cable production
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Flange to FEE cable16 conductors coaxial 50W halogen free cable asked
Reflected Signal Amplitude = +104mVDirect Signal Amplitude = -1.272 VCable Impedance Z0 = 42.5 Ohm
Firm already asked for a new cable production
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Test of the FEE boards at ± 7V
Diode protection patch has been developed to substitute the voltage regulators on the board
The current drained by the FEE boards is reduced form 1A to 0.85A with a ~15% power reduction
The boards has been successfully operated in the reprogrammed crate at ±7V
There is no need for main power voltage regulators on board the LAV FEE !
Still have linear regulator on each of the mezzanine to have precise voltage supply
The LAV FEE can be operated at ±7V instead of the ±12V, removing the regulators and reprogramming the LAV crate to provide ±7V.This option allow us to save power and to avoid producing regulators
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Validation and production status ToT mezzanine:
• Fully validated during laboratory tests • 100 pcs already tested • 1600 pcs already in production
Sums mezzanine:• Validated after minor corrections on 30 prototypes• Production of all 1000 pcs will start before the end of the 2011
VME 9U mother boards• 5 pcs already produced 3 of which tested and fully equipped• Minor issue identified in the mechanics• Test still ongoing on pulser and CPU sections
CPU and pulse controller mezzanine:• 5 CPU and 5 pulse controller prototypes produced• Functionality still under test
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LAV planning for the 2012 runsEquip 3 full LAV station (ANTI-A1 ANTI-A2 ANTI-A3)• 15 LAV FEE boards fully equipped (240 ToT mezzanine)• If CPU mezzanine shows no problems• Can have a alpha release firmware for march or april 2012
TELL1 or TEL62 Firmware:• Basic firmware for data correction (time only) • Basic firmware for the L0, just like a OR(160 in)
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ConclusionsThe massive production of LAV FEE has been
started• ToT and sum mezzanine already in production
LAV crates are ok• We shall decide the “Standard” voltage settings ±12V or
±7V2012 run and production status• We are at the moment confident to have 3 fully equipped
LAV for the 2012 test run.