This morning the AOM ran out of range and after 20 locklosses the ISS stayed unlocked by design. This gives notification in SQZ_OPO_LR  guardian "Disabled pump iss after 20 locklosses, reset counter to clear message" and AOM has a yellow box around it. We think that's because the ISS locked with a much lower SHG launch power before it was increased in alog68659, even thought the CONTROLMON (gray trend) doesn't get too close to it's end of range range (0-10V) see plot. Nutsinee, Naoki and Vicky added another SHG power monitor to look for unusual drifts in 68632.

To turn the OPO ISS back on and clear this message, you can request SQZ_OPO_LR guardian to LOCKED_CLF_DUAL_NO_ISS and then back to the nominal LOCKED_CLF_DUAL. This will clear the counter and reset everything before relocking the ISS. Nominally, AOM screen will be on Servo not Ramp  (SQZ Overview > SQZT0 > +200MHz AOM medm). 

OPO ISS: We use the green pump AOM (actuating on H1:SQZ-OPO_ISS_CONTROLMON) to stabilize the amount of launched power into the pump fiber (H1:SQZ-OPO_TRANS_LF_OUTPUT). This keeps the NLG stable.