• 27 or 29 total ADC channels are used (depending whether we keep 2 spare adc chans)
  • 4 each go to ASC_QPD1/2 (8 chans total)
  • 5 go to TRANS_PD1, TRANS_PD2, REFL_PD, TRANS_PD1_UF, TRANS_PD2_UF. These PD are used for ASC and LSC.
  • 2 go to the LSC, one each for DVMDC, DVMAC, X3DC, and X4DC
  • 12 go to the ASC_PZT
  • 2 go to the SPARE_ADC (not sure what this is)
  • I think these channels are (or were at some point) defined in memory by /cvs/cds/caltech/chans/ipc/G1.ipc
    • I found this from elog 2860; it mentions that these should eventually be migrated over to a file C1.ipc, but I don't see any OMC channels in that file or any of the 'old' C1.ipc files, so I suppose it never happened or they were removed later
  • During this vent, we won't have ASC, so
• 10 or 14 DAC channels are used (depending whether we keep 4 spare dac chans)
  • 2 from the LSC, one for CLK_OUT and one for "LSC"
  • 8 from ASC, including P1A, P1B, P2A, P2B, P1OSC, Y1OSC, P2OSC, Y2OSC
  • I think these channels are (or were at some point) saved to frames due to /cvs/cds/caltech/chans/daq/C1OMC.ini, which I found from elog 2073
  • At some point, the 33MHz mod depth was controlled by one of the spare OMC chans, C1:OMC-SPARE_DAC_CH_15. See elog 2126. I assume this is no longer the case, since c1omc is defunct.
  • Durnig this vent, we won't have ASC and don't need to CLK_OUT the LSC, so we may just need one DAC channel

As of at least Nov 2009, the .par file for the OMC was located at /cvs/cds/gds/param/tpchn_C2 (see elog 2316)

• Kepco HV supply, "OMC-L-PZT", labels indicate it goes to 250V, needs to be tested  ("TESTED OK 2014OCT12")
• Tip/Tilt Piezo Driver, LIGO D060287
• HV Piezo Driver, LIGO D060283
• QPD Whitening Board, D060214
• LIGO D050374/D050387
• LIGO D050368/D050373

Need to check:

• Can the ADC/DAC adapter boards (eg D0902006) drive whatever ~10V control signal we need across ~10m of SCSI cable?
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