Reports until 21:44, Friday 31 August 2018
H1 SQZ (SQZ)
nutsinee.kijbunchoo@LIGO.ORG - posted 21:44, Friday 31 August 2018 (43783)
Temporary 34kHz LO notch filter installed

Marc, Nutsinee

First image from the SR785 is what we have (Q=0.3), the last image was what we first came up with (Q=1). Marc ended up having to short R2 (the 50 Ohms) for it to work somehow.... Haven't looked at the new LO transfer function but I was able to push the gain further before PZT rung up. Good for now. We didn't use LLO's design since out LO PZT doesn't have 29kHz resonance. 

Images attached to this report