J. Kissel

The QPD channels in the H1SPIH23 PD array have a z:p = 0.39:39.6 Hz whitening filter in their analog transimpedance amplifier (D1001974-v8). As such, I've installed and turned on an "antiWh" compensation filter = zpk([39.8],[0.39],1,"n") in FM2 of all the H1:SPI-H23_OL_QPD_{A,B}_SEG{1,2,3,4} banks, and accepted the turn on in the SDF system and committed the filter filter to the userapps repo rev 35564.