Reports until 16:58, Wednesday 17 December 2025
H1 SUS (CDS)
oli.patane@LIGO.ORG - posted 16:58, Wednesday 17 December 2025 (88583)
h1susham1 model edit and restart

Erik, Rahul, Jeff, Fil, Oli

Earlier today we realized that the JM3 model ADC inputs did not match up with the cabling documentation. The documentation lists the order of the OSEM PD inputs into the AA chassis as JM1: CH 0-3, JM2: CH 4-7, JM3 CH 8-11. However, the h1susham1 model had the inputs for JM3 as CH 4-7, accidentally forgetting to leave room for the maybe-one-day JM2. This resulted in a bit of confusion until we figured this out. We temporarily moved the JM3 OSEM PD to AA chassis cable into the CH 4-7 inputs to match with the model so installation work could proceed, but once they were done we wanted to change the model to match up with all the documentation we had. To do this I just edited the h1susham1.mdl file and changed the JM3 ADC numbers from 1_4,1_5,1_6,1_7 to 1_8,1_9,1_10,1_11 and committed the model as r34274 (before, after). I then also updated susjm3_overview_macro.txt to have those adc number match and that was committed as r34275.

Erik restarted the h1susham1 model and everything came back fine (88581). Since earlier we had swapped the OSEM PD cable for JM3, the JM3 readouts currently look like nothing because we still need to swap that cable back to its correct spot tomorrow.

Images attached to this report