TF crashed (watchdog trip) last night at 6pm local. Very weird. The attached plots show the details. First plot shows all the excitation channels for a 3 hour period around the watchdog trip, you can clearly see where we were driving at ~3000cts on each exc channel (this wasn't happening at the exact moment of the trip. The second plot shows the V4 excitation channel and the V4 L4C that tripped over a 100 second window. There is a very low drive, but  high frequency excitation that does not look like the other parts of the transfer function being run at the time. But, this excitation is also roughly at the same time as when we were driving on a different (H1) channel.

Fabrice was able to copy the signal from the V4 excitation channel at the time of the trip and send it again with some matlab trickery, but we saw nothing on any of the chamber's (HEPI, ISI, SUS) sensors. So we still don't know what caused the trip. Weird.