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Reports until 16:28, Friday 27 September 2019
H1 ISC (ISC, OpsInfo)
evan.hall@LIGO.ORG - posted 16:28, Friday 27 September 2019 (52171)
More whitening on AS A RF45, and a note for operators

【Craig, Evan】

Craig already logged here that we added two more stages of whitening on AS A RF45 and then accepted the SDF differences for the resulting antiwhitening filters that have to be engaged.

Note for operators: if you find that this change prevents lock acquisition, you can revert it by going to sitemap > ASC > ASC Overview > AS_A_RF45 (first red button up in the left-hand corner) -> Q filters, and then clicking off Stage 3 whitening and Stage 2 whitening (leave on Stage 1 whitening). You'll then have to accept SDF differences for the eight RF45 filter modules.

However, Craig and I looked at the ADC counts on these channels during previous lock acquisitions and we think there should be no ADC range issues.

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