J. Kissel

Pushing forward and making filter file changes while out of observing, I've changed the arrangement and amount of filtering in the OMC DCPD A1, A2, B1, and B2 banks again. 

Last time, I configured the banks to be analog channel agnostic, so I used up the spare filter banks to include copies of both the A and B analog electronics compensation in each of the four paths (LHO:82313). Talking with Louis and Evan this morning, in light of the discovery that more digital anti-aliasing would be prudent, I instead use up the spare banks for copies of the existing anti-aliasing filters (much like Louis and Evan had done over the weekend).

Check out screenshot of the configuration setup for one test we plan to do: using the 1st attachment in LHO:82375, comparing the performance of the RED, Dec65k*Dec16k filtered nominal trace to GREEN Dec16k*Dec16k and MAGENTA Dec65k*Dec16k*Dec16k. These options, which have lesser phase impact that the straight 2x copy of the existing filters, will also tell us whether it's the frequency content in the signal between 7 and 32 kHz or that of 32 kHz and above that matters in the GW band.