Jim, Sebastien

New tests have been done on the BSC-ISI in the staging building (to see the first results, go to log #7718):

1. We swapped the feedthrough between corner 2 and corner 3. Doesn't change anything: the feedthrough in corner 3 seems to be good.

2. We use 2 cleaned breakboards and an oscilloscope  to track the signal of the GS13 in corner 3. The first one was directly plugged into the sensor, the second one at the end of the pigtail cable. The signal coming out of the first one seems to be good: nice amplitude, reacts at low and high frequencies. The signal coming out of the second one looks bad: very weak amplitude (factor of 200 compare to the first one), no reaction to DC excitation.

We swapped the pigtail cable with the one from corner 2, and even with a new cable: no changes.

3. We used this new cable and a new GS13 in corner 3: no changes...

Thus no conclusion yet, we're still investigating.