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Entry  Sun Jan 24 18:35:47 2010, Frank, Laser, RefCav, new slow actuator values 
    Reply  Tue Jan 26 03:38:10 2010, rana, Laser, RefCav, frequency findings  
       Reply  Wed Jan 27 11:25:33 2010, Frank, Laser, RefCav, frequency findings  
          Reply  Wed Feb 3 16:19:52 2010, Tara Chalermsongsak, Laser, RefCav, frequency findings  power_at_AOM.jpgReflected_pwr_from_AOM.jpg
             Reply  Wed Feb 3 18:58:50 2010, Tara, Laser, RefCav, frequency findings  comparison.JPGTbeam.JPGRbeam.JPG
Message ID: 38     Entry time: Tue Jan 26 03:38:10 2010     In reply to: 37     Reply to this: 39
Author: rana 
Type: Laser 
Category: RefCav 
Subject: frequency findings  

I guess if you have a frequency counter with a GPIB interface or a simple flip-flop XOR based phase/frequency discriminator, you can feed the output to a 3113 and use at as an input to a slow EPICS PID to bring the beat frequency to within range.

Actually, we need a frequency discriminator for the Green Locking so it might be good to brainstorm about this with Aidan and Koji.

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