Today while in DRMI ASC, and while trying to debug other problems with DRMI acquisition, Ryan, Tony, and I saw that the DRMI ASC starting pulling the buildups in a bad direction, which made no sense. We were trying to figure out which loops were the culprit, when I saw that the SRC1 offsets were engaged. These offsets had been put in place during the problems with the OFI, and we don't run with these offsets in full lock anymore. I turned the offsets off and the buildups starting moving in the good direction again. This is very confusing, because we've been running like this for ages probably without a problem. Today it was suddenly a problem. I commented out the lines in the ISC_DRMI guardian state PREP_DRMI_ASC where these offsets are turned on and loaded.
I made a minor mistake here- I only commented out the lines in ISC_DRMI where the offset is SET, but I didn't comment out lines where the offset is turned ON. However, ISC_LOCK sets a random offset in SRC1 as well, and doesn't turn it on, but then we were in a situation where ISC_LOCK sets a weird offset, and then ISC_DRMI turns it ON. This meant today the DRMI ASC came on in a very strange way and pulled the alignment far off. I have now commented out all lines in both ISC_DRMI and ISC_LOCK that set these offsets, and turn the offsets on. Hopefully, this won't be an issue again.