Hybrid Testing Status

1
Hybrid Testing Status

• Lance Simms
• 6/22/04

2
With old software things were okay

• Opens, shorts, and noisy channels detected
• Automatic XML uploading
• Cuts adjustable from configuration files
• Manual mode ARCS available for hardware
  troubleshooting
• Automatic report.txt file uploading to local
  database (UCSB only)

3
But pretty ghetto for the most part

• Hybrids that failed at -20 a mystery simply
  swept aside.
• XML files contain only
• -Flagged channels -Pedestal
• -Operator -Noise
• -Test Script used
• -Tool ID
• -Date/Time of test

4
Even worse

• False channel identification for six-chip hybrids
  (only seen in three cases)
• TESTWITHPA_val held at 0 regardless of test
  outcome
• Only two grades PASS / FAIL
• One or more shorted channels OR five or more
  noisy OR open channels - Hybrid fails

5
Now Underlying DAQ library can be compiled
Microsoft Visual C 6.0 or higher required
6
Latest Teststation version in use at CERN is now
operational and modifiable

• Labview source code can be changed and recompiled
  into an executable file
• Allows UCSB/FNAL specific adjustments such as
  readout of air/water flow sensor in ACDC
• MUX, PLL, DCU, etc. are now accessible through
  C/labview interface

Not possible with code currently in use at UCSB
FNAL dll source was not available
7
Features of New Software

• PLL status check
• PLL Forcing (If necessary)
• Drifting Pedestal Check
• New Hybrid Grading A/B/Fail
• XML generation (Not automatic yet)
• Manual mode disabled

8
PLL Failure? Take those old hybrids off the shelf

• Initialization now talks to PLL
• Reads bit 0 of PLL Control and Status register 1
• 1 if PLL is going
• the norm after reset sequence
• PLL operation is controlled by auto calibration
  circuit
• 0 if PLL is not going
• Occurs at -20 C
• Requires PLL forcing PLL operation is
  controlled by I2C interface
• Hybrid will initialize in cold

9
PLL comment in report XML file
Slight problem For some reason pedestal and
noise have increased edges with new
software. Probably something simple.
10
Open Vias should be found

• Final report vi compares the average pedestal
  for each APV between tests
• If pedestal drifts, comment will be made in
  report.txt and XML file

11
New Grading Agreement with CERN

• "TIB_P_4D", "TOB_P_4U".."TOB_S_4D", "TEC_4U"
• 0-2 noisy or open channels "A" hybrid
• 3-4 noisy or open channels "B" hybrid
• 5 noisy or open channels Failed
• One or more shorted channels Failed
• "TIB_S_6U".."TID_S_6D", "TOB_P_6U", "TEC_6U",
  "TEC_6D"
• 0-3 noisy or open channels "A" hybrid
• 4-6 noisy or open channels "B" hybrid
• 7 noisy or open channels Failed
• One or more shorted channels Failed

New code still allows for only one channel to be
flagged as short. A consensus should be made as
to what constitutes a short.
12
XML Generation

• Bruno Wittmer (teststation architect) is person
  associated with XML files
• XML files output by new software should contain
  everything in old files
• Comments on PLL Drifting Pedestal
• TESTWITHPA_val indicating grade of hybrid
• Automatic uploading will be added

Still have not successfully generated XML file
with new code
13
Additions to Code

• CVS repository at CERN contains all updates
• http//cms-project-cmstobss.web.cern.ch/cms-p
  roject-cmstobss/
• CVS tools available in linux and Windows,
  making updating easy
• US can contribute

• Documentation http//cmsdoc.cern.ch/cmsoo/proje
  cts/cvs_server.html

14
Equipment

• One spare peltier in US
• Ours has failed due to overheating once
• ARC boards (Ask Tony)
• One spare crate at UCSB (belongs to
  Fermilab/going to Mexico City)
• NIM modules (1 of each used in pulser)
• Spare humidity temperature sensors
• 2 peltier power supplies
• No spare chiller (Perhaps one should be
  purchased)

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Documentation AOB

• Documentation on ARCS, ACDC, XML files, etc. will
  be collected, organized, and posted on web
• Side by side updating of code at UCSB and Fermilab