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Entry  Fri Jul 20 12:12:25 2012, rana, Update, PSL, PMC problems examined Untitled.png
    Reply  Sat Jul 21 14:05:21 2012, Den, Update, PSL, PMC problems examined fss_slowm.png
Message ID: 6998     Entry time: Sat Jul 21 14:05:21 2012     In reply to: 6995
Author: Den 
Type: Update 
Category: PSL 
Subject: PMC problems examined 


WE found that the PMC EPICS values had not been toggled since the reboot and so the RF phase and Amplitude were totally wrong (we should replace this with a fixed oscillator box as we did with FSS).

Also, the NPRO SLOW slider was at -2 V which made the mode going into the PMC funny (although the mode was OK this morning before I started playing with the PMC sliders).

 PMC transmission is oscillating  in the range 0.5 - 0.85. PMC PZT voltage is 1-2 V.

FSS slow controls was -2.5 V. I adjusted it to 0 and PMC stabilized. PMC PZT voltage is 128, transmission is 0.845.

But most probably, slow control will drift again.


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