Reports until 17:34, Friday 10 January 2014
H1 ISC
sheila.dwyer@LIGO.ORG - posted 17:34, Friday 10 January 2014 (9214)
PLL servo board

Daniel, Sheila

We measured some tranfser functions of the PLL servo board.  

 

Attached files are : X end PLL servo board 10kHz to 100kHz

AA1.txt , common compensation on, 0dB gain, generic filter on

AAA2.txt, 0dB gain, common compensation on, fast option on (this is a 292.48kHz notch)

AAA3.txt 0dB gain, nothing on  (we were using the common mode servo which has a high impedance output to drive the RF analyzer which has 50Ohm inputs, we also used a BNC T. This might be why there is strange 2dB feature around 200kHz which should be subtracted from the other traces).  

Non-image files attached to this report