Reports until 07:22, Monday 24 October 2016
H1 PSL
peter.king@LIGO.ORG - posted 07:22, Monday 24 October 2016 - last comment - 09:19, Monday 24 October 2016(30781)
Kepco BHK 500-0.4MG voltage noise
Attached is the voltage noise spectrum of the Kepco BHK 500-0.4MG power supply that provides the high
voltage for the pre-modecleaner and injection locking.

    I need to check with Marc to see what the voltage monitor divider ratio was.
Images attached to this report
Comments related to this report
marc.pirello@LIGO.ORG - 09:19, Monday 24 October 2016 (30787)

The voltage divider ratio was 1/10.

9M probe and 1M internal to the SR785.

There was also a high pass filter (dc block) in line with a cutoff frequency of 0.0875 hertz.

Images attached to this comment