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Tue Apr 28 04:30:16 2009
RF full lock
I believe we have succeeded in the full lock of the interferometer with the RF signals.
The lock process is reasonably robust and repeatable.
I did a scan of the RF CARM offset and plotted the arm power as a function of the CARM offset (see the attachment).
The arm power goes maximum at non-zero CARM offset. I guess the RF CARM error signal has some offset.
Maybe the demodulation phase is wrong ? I will tweak this tomorrow.
The script to do this scan can be found at /cvs/cds/caltech/scripts/CM/CARMSweep.
I haven't tried DC readout yet.