BOC Reference

InLink scan in Console

  • scan
  • auto-analysis
  • offline analysis
    • execute following commands to create a root histogram containing pp0 and pin current per channel.
    • it's the same root tree structure as JF's root tree but, Quadrant, RODName, and frontplate are not filled.
      /home/schsu/daq_tdaq_01_09_00/PixelDAQ-1-0-0/Applications/Pixel/PixResultsDbCoral/src/CORAL-readInLink AnalysisID

InLink scan studies

The IPin current (an estimator of TX laser power) increase with respect to time in Pit.

  • Do we observe the same behavior in SR1?
  • What is the uncertaintiy of PIN current measurement?
    • did inlink scan consecutively three times at 7am and 7pm for one week.
  • What is the temperature dependence of PIN current?
    • store Opto-temp and inLink scan current at the same time

The TX laser current doesn't change during scan. The problem can be solved by re-initialize RODs.

SCAN 7407, Jul 30 7:00, The other RODs are fine except ROD 14, 21.

  • x-axis: channel 0~31, 8 channels per PP0
  • y-axis:
    • entry 1: each Channel Laser Current 00
    • entry 2: wait time for entry 1 ( one count 2 seconds)
    • entry 3: each Channel Laser Current A0 one at a time
    • entry 5: wait time for entry 3 ( one count 2 seconds)
    • entry 6: each Channel Laser Current A0
  • Since it happend twice per week on Jul 26 2008, Jul 30 2008, Jens suggested to print out the handshake between ROD/BOC and values of BOC register after we write command.
  • The series of InLinkScan function call to set TxLaserCurrent
    Applications/Pixel/PixLib/PixModuleGroup/PixModuleGroup.cxx:  inLinkScan() { TxPlugin->setTxLaserCurrent()};
    Applications/Pixel/PixLib/PixModuleGroup/PixBoc.cxx: setTxLaserCurrent(){ctrl->setBocRegister("LaserCurrent", hardChannel, value);}

Opto Tune

  • S7704 is 3D tag in NewDsp, the VISET is set to 800mV after scan
  • However, the BOC_CONFIGURATION shows the VISET is 750mV?

-- ShihChiehHsu - 30 Jul 2008

Topic attachments
I Attachment History Action Size Date Who Comment
PNGpng BOC_THR_DEL_FAST_S7704_L0_B12_S1_C7.png r1 manage 23.6 K 2008-08-01 - 14:26 ShihChiehHsu C1_S12 has one module not tuned well
PNGpng BOC_THR_DEL_FAST_S7704_L0_B12_S2_C6.png r1 manage 23.6 K 2008-08-01 - 14:26 ShihChiehHsu C0_S11 one of the module is not tuned well
PNGpng InLink_ROD_C1_S14_S7407.png r1 manage 11.2 K 2008-07-30 - 08:17 ShihChiehHsu ROD_C1_S14 has no response on individual laser current settings
PNGpng InLink_ROD_C1_S21_S7407.png r1 manage 11.5 K 2008-07-30 - 08:18 ShihChiehHsu ROD_C1_S21 has strange response on individual laser current settings
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Topic revision: r5 - 2010-06-11 - PeteJones
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