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Entry  Wed Nov 3 02:37:39 2010, yuta, Summary, Green Locking, coarse locked green beat frequency Screenshot_LowFreqLock.png
    Reply  Wed Nov 3 03:00:47 2010, Koji, Summary, Green Locking, coarse locked green beat frequency 
Message ID: 3851     Entry time: Wed Nov 3 03:00:47 2010     In reply to: 3850
Author: Koji 
Type: Summary 
Category: Green Locking 
Subject: coarse locked green beat frequency 

Wow! Great guys!!

Can I expect to see the spectra of the frequency counter output with and without the servo?

RA: I think the SBP-70 is a bad idea. It limits the capture range. So does the SHP-25. You should instead just use a DC-block; the SR620 should work from 1-200 MHz with no problems.

Also, we have to figure out a better solution for the DAC at the ends: we cannot steal the QPD gain slider in the long run and the 4116 DAC at the ends has all 8 channels used up. Should we get the purple box for testing or should we try to use the fast DAC in the EX IO chassis as the actuator?

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