Á. Fernández-Galiana, J. Kissel, T. Shaffer

TJ and Álvaro backed off all of the newly installed OPO suspension's OSEMs from their flags in order to gather open-light current values with the final electronics. Once hooked up to the previously installed in-vacuum cabling (see LHO aLOG 40613), they lit up without problems (thanks Hugh, Corey, Nico, and Marc!).

These OSEMs must have been cherry-picked for goodness; all but one of them (V3) saturates the ADC when backed off from the flag enough that the LED is fully exposed to the PD (or they're "open lighted"). Thus, the open light current table looks a little silly, but so be it.

         Open Light Current / ct     GAIN          OFFSET     Notes
         (as ADC Counts)             (30000/olc)   (-olc/2)
H1       32767                       0.916         -16384     **Read out as "H2"
H2       32767                       0.916         -16384     **Read out as "H1"
H3       32767                       0.916         -16384
V1       32767                       0.916         -16384
V2       32767                       0.916         -16384
V3       30961                       0.973         -15481

 
**IMPORTANT NOTE: We have deviated from the cabling the H1V1H2V2 quadropus cable as designed (D1700384) and from as-built L1's OPOS (TST aLOG 11314) due to mechanical interference. This means we will have to change the top-level simulink diagram to account for this in-vac cable ordering in order to remain sane (common library parts will be unaffected by the quirk).

These values have been installed into EPICs, turned on, and accepted in the SDF system.