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Message ID: 9054     Entry time: Thu Aug 22 20:25:28 2013
Author: Masayuki 
Type: Summary 
Category: Green Locking 
Subject: Y-arm PDH OLTF measurement 

[Manasa, Masayuki]
We measured the the openloop transfer function of the PDH green lock of the y-arm.The measurement setup was same as yesterday's measurement.elog 9047

In this measurement, the servo gain was 7 and the source amplitude for the excitation was 1 mV. As you can see in below figure, the measured UGF was 15 kHz and the phase margin was 45 degree.

attatchment1 - OLTF with servo gain of 7

OLTF_PDH_Glock_yarm_7.png

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