40m QIL Cryo_Lab CTN SUS_Lab TCS_Lab OMC_Lab CRIME_Lab FEA ENG_Labs OptContFac Mariner WBEEShop
  40m Log  Not logged in ELOG logo
Entry  Wed Dec 16 11:21:20 2009, Alberto, Update, ABSL, Universal PDH Box Servo Filters NewandOlfFilterTF.pngNewandOlfFilterTF.png
    Reply  Wed Dec 16 11:55:47 2009, rana, Update, ABSL, Universal PDH Box Servo Filters 
Message ID: 2423     Entry time: Wed Dec 16 11:55:47 2009     In reply to: 2421
Author: rana 
Type: Update 
Category: ABSL 
Subject: Universal PDH Box Servo Filters 

 

 To me, they both look stable. I guess that the phase has to go to -180 deg to be unstable.

Why does the magnitude go flat at high frequencies? That doesn't seem like 1/f.

How about a diagram of what inputs and outputs are being measured and what the gain knob and boost switch settings are?

ELOG V3.1.3-