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Entry  Tue Aug 7 23:06:30 2018, Koji, Update, PSL, EOM measuement preparation 
    Reply  Wed Aug 8 20:56:11 2018, Koji, Update, PSL, EOM measuement preparation 
Message ID: 14144     Entry time: Tue Aug 7 23:06:30 2018     Reply to this: 14145
Author: Koji 
Type: Update 
Category: PSL 
Subject: EOM measuement preparation 

I was preparing for the aLIGO EOM measuement to be carried out tomorrow afternoon.

I did a few modifications to the PLL setup.

  • The freq mixier in the PLL setup was replaced with ZP3 (level 7) from ZAD-6
  • The PLL gain was reduced from 3.10 to 2.80 to prevent servo oscillation
  • The main PSL marconi is connected to the PLL mixier and providing fixed 200MHz 8dBm.
  • The main PSL modulation is off.

Tomorrow I am going to modulate the EOM with the AUX Marconi via an amplifier (probably)

Automated scripts (AGinit.py and AGmeas.py) are in /users/koji/scripts

I will revert the setup once the measurement is done tomorrow.

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