Gautam and I tested out the DAC that he installed in the latter half of last week. We confirmed that at least one of the channels is can successfully drive a sine wave (ch10, 1-indexed). We had to measure the output directly on the SCSI connector (breakout in the FE hard drive cabinet along the Y arm), since the SCSI breakout box (D080303) seems not to be working (wiring diagram in Gautam's elog from his SURF years).
I added some DAC channels to our c1omc model:
PZT1_PIT
PZT1_YAW
PZT2_PIT
PZT2_YAQ
And determined that when we go to use the ADC, we will initially want the following channels (even these are probably unnecessary for the very first scans):
TRANS_PD1
TRANS_PD2
REFL_PD
DVMDC (drive voltage monitor, DC level)
DVMAC ("", AC level, only needed if we dither the length)
I attach a screenshot of the model, and a picture of where the whitening/dewhitening boards should go in the rack. |