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

OUTLINE

Status of the FEE boards for the LAVTools for testingThe LAV to TDC cablesAnalog cablesStatus of the LAV electronics massive production

The LAV 9U FEE board1 2

3

4

4

3

Supply voltage ±12V reduced to ±7.5V by onboard voltage regulators

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

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

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!!

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

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

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

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

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)

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.