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Reports until 15:28, Friday 22 May 2015
H1 SEI
hugh.radkins@LIGO.ORG - posted 15:28, Friday 22 May 2015 (18589)
CPS Noise Checks again after House Clock Sync addition

My logs from LHO 18386  & 18468 showed some 'after' elevated noise on the CPS.  Mainly on ITMX Stage2 H2, and now that I look again, the ITMX Stage1 V1 noise is a little elevated.  The first look at these in the first log, was during the day.  When I looked during the long lock stretch last Thursday, second log, I didn't explicitly look at the ITMX ST2 H2 but I said this channel looked good during the lock stretch.  However, ST1 V1 on ITMX is elevated above about 25hz where the traces flatten--see attached.  The ST2 V2 also is elevated but the Horizontals generally look fine.

The second attachment shows just the Corner 2 CPS and they look good.

Images attached to this report
Displaying report 1-1 of 1.