Production modules

1
JEM Status and plans

• Production modules
• Status
• Plans

2
JEM1.3 (production)

• Sum processor XC2V2000
• Jet processor XC2V3000
• 4 input modules (IM) v1.1 (XC2V1500, SCAN921260)
• TTCdec module
• Control Module (CM) v1.3
• CAN
• VME control
• Fan-out of configuration lines
• G-link readout module (RM) v1.2

3
From pre-production to production

• Minor modifications of JEM wrt pre-production
  modules silk screen, pads for CLKdes2
  terminators, reduced bypass capacitance on 3.3V
  supply due to crate supply oscillations
• 4 pre-production 41 production 45 fully
  functional modules to be used on ATLAS
• 32 in JEP crates 13 spares !
• Yield so far
• 2 defective JEMs found NO BGA issues, just one
  short on connector and one chip mounted in wrong
  orientation
• 8 input modules with BGA issues (replace?)
• 7 input modules with minor issues (rework?)
• small numbers of defective control and G-link
  modules

4
Module production story

• Many production issues with prototypes and
  pre-production
• All production steps have taken far longer than
  scheduled, minimum a factor of two
• Problems were reported only shortly before
  delivery dates, even if they were known for quite
  a while
• 3 iterations of input module PCB (impedance
  issues and others)
• 2 iterations of JEM PCB (impedance)
• Wrong component (SMB voltage sensor) mounted on
  control module
• Inverted tantalum on control module ? rework
• Insufficient cleaning and drying of input modules
  leading to malfunction ? rework

5
Acceptance tests (Bruno)

• Record electronic serial number
• JTAG B/Scan
• Input modules
• Control modules
• JEM main boards
• Flash and check CPLDs and CAN controller
• Basic LVDS link tests lock / no lock to 40MHz
  square

6
System tests, Mainz trigger lab

• Interface tests only, using counter patterns
  (linear ramp)
• Error detection mainly in firmware
• Basically using features built into production
  firmware for timing calibration
• Interfaces tested
• LVDS inputs - ramp pattern required for timing
  calibration (PPM!)
• FIO - pattern detection required for timing
  calibration (not yet included in jet production
  firmware)
• DAQ and ROI links - software error detection
• CMM - parity detection, pattern generation (so
  far) in dedicated firmware
• For details see Markus / Andrea
• Full system tests with ROD readout at CERN only

7
Plans

• ship 8 crate-tested JEMs on March 19 to make a
  full crate of JEMs available for system tests at
  CERN
• continue production tests in Mainz ( 2 weeks)
• delay further module shipment until crate
  situation at CERN becomes clear
• full JEP system tests at CERN as soon as
  infrastructure complete
• Meanwhile cabling, crate issues, firmware,
  software