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Reports until 01:15, Friday 03 April 2015
H1 ISC (DetChar, ISC)
sheila.dwyer@LIGO.ORG - posted 01:15, Friday 03 April 2015 (17652)
attempt to reduce ETMX ESD DAC glitches

We've had some difficulties locking today, in part because sometimes when the ASC comes on, it misalings things and causes mode hopping. 

When we did lock, we planned to work on reducing the ETMY DAC glitches (alog 17555), first by pushing up the L1/L3 crossover then by turning off the linearization.  We got as far as measuring the crossover, screenshot attached.  We designed a lead filter to give us some phase to push the crossover up to about 2 Hz, but ran into trouble with locking and now HAM3 HEPI.

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Displaying report 1-1 of 1.