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Entry  Thu Oct 24 04:13:15 2013, Jenne, Update, LSC, PRMI + 2 ALS arms 
    Reply  Thu Oct 24 08:04:54 2013, Steve, Update, LSC, PRMI + 2 ALS arms 
    Reply  Thu Oct 24 09:08:27 2013, jamie., Update, LSC, PRMI + 2 ALS arms 
    Reply  Thu Oct 24 14:14:18 2013, rana, Update, LSC, PRMI + 2 ALS arms 
       Reply  Thu Oct 24 15:19:58 2013, Koji, Update, LSC, PRMI + 2 ALS arms 
    Reply  Thu Oct 24 23:25:37 2013, Jenne, Update, LSC, End transmission triggering 
       Reply  Tue Nov 5 16:47:09 2013, Jenne, Update, LSC, End transmission QPDs 
    Reply  Fri Oct 25 04:03:40 2013, Masayuki, Update, LSC, 'scope and spectrum analyser for REFL165 
       Reply  Fri Oct 25 21:36:51 2013, Masayuki, Update, LSC, 'scope and spectrum analyser for REFL165 
          Reply  Mon Oct 28 14:24:01 2013, Masayuki, Update, LSC, 'scope and spectrum analyser for REFL165 
             Reply  Mon Oct 28 18:57:27 2013, Masayuki, HowTo, LSC, read 'scope and spectrum analyser datas 
Message ID: 9295     Entry time: Fri Oct 25 21:36:51 2013     In reply to: 9289     Reply to this: 9304
Author: Masayuki 
Type: Update 
Category: LSC 
Subject: 'scope and spectrum analyser for REFL165 

Quote:

As Jenne's Elog we want to see Spectrum and time series of REFL 165 (our PRMI LSC locking PD) to see if the signal is saturated while bring the arms into resonance.
I started to connect the spectrum analyser and the 'scope to REFL165 output.

Directional coupler (Mini=-circuits ZMDC-10-2 ZMDC-20-3) was connected just before the dimod boad input. The main output of coupler is plugged into demod board's input.The other output of the coupler is connected to AG4395A using BNC cable.

The spectrum analyser output can be read using netgpibdata in control room. The IP address is 192.168.113.108 and the GPIB address is 17. For this I dissconected the network hub from another AG4395A, which is at the front of 1X2 lack.

I didn't connected the 300 MHz 'scope right now, but tomorrow it will be connected using power splitter and also be able to get data by internet. For connect 'scope to network, I disconected the network hub from SR785.

[Jenne, Masayuki]

We changed the Directional coupler from ZMDC-20-3 to ZMDC-20-5-S+ because that coupler seemed to introduce some high frequency noise.

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