All of the ISI have a script, connected to a button on the commands screen that controls the state of the analog gain of the GS-13s, but this script didn't control the whitening (see 16606 and comment, as well as 16425). Ryan dR has edited this script, such that it now controls the dewhitening filters. The configuration we think we want to run is with the analog gain on and no analog whitening (studies forthcoming), which means the Gain and Dewhitening filter lights off. Not all chambers have been to the "correct" configuration, this something Hugh and I will take care of over the next few days. The first two images show where to launch the command screens from on HAM and BSC ISI overviews, the second two show the gain switch buttons on the command screens.