Reports until 02:44, Thursday 25 October 2018
H1 ISC (INS)
craig.cahillane@LIGO.ORG - posted 02:44, Thursday 25 October 2018 - last comment - 20:59, Wednesday 07 November 2018(44811)
LSC PD RF levels 
Keita, Craig

We checked all the LSC PDs while locked in nominal low noise with normal modulation depth settings.  Remember that we multiply the scope output by 14 to get the actual demodulated signal, since the demod board picks off -23 dB for the RF monitor.

REFL9pp ~   560 mV
POP9pp ~    280 mV
REFL45pp ~ 1120 mV (!)
POP45pp ~    70 mV

REFL45 seems to be slewing at ~ 100 V/us, seems pretty fast.
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Comments related to this report
keita.kawabe@LIGO.ORG - 08:16, Thursday 25 October 2018 (44816)
Link

"normal" means RF9 not reduced.

(We've looked at REFL45 though it's not used for LSC as when the RF opamp for 45 is going crazy it could affect the input side.)

We will repeat this with the reduced RF9.

daniel.sigg@LIGO.ORG - 13:41, Thursday 01 November 2018 (44966)
Link

Nominal modulation index for 9.1MHz: Γ~0.191
Nominal modulation index for 45.5MHz: Γ~0.251

For the above measurement the modulation index for 45.5MHz was reduced by 3dB to Γ~0.177.

peter.fritschel@LIGO.ORG - 13:50, Friday 02 November 2018 (44987)
Link

Side-by-side numbers for H1 and L1 are posted in LLO log entry 41547

craig.cahillane@LIGO.ORG - 20:59, Wednesday 07 November 2018 (45105)
Link 

RF slider settings during this measurement.
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