Sebastien, Jim
We are currently testing the BSC-ISI unit #6 in the staging building. The 2 stages are unlock and balanced, everything seems to be well connected.
The power spectra show something wrong on GS13-V1 and GS13-V3 (see figure attached).
After further investigation, the issue seems to be 2 bad cables. They will be change tomorrow.
***UPDATE***
We tried a bunch of different tests today.
1. We swapped GS13-V2 (good signal) with GS13-V3 (bad signal). Now the GS13-V3 presents a good behavior: the issue doesn't seem to come from the sensor.
2. We swapped, one by one, all the cables between corner 2 and corner 3 (in-air cables, extensions, sensor cables). Those changes didn't affect the results observed: the issue doesn't seem to come from the cables.
3. We plugged the corner 3 GS13s into another feedthrough (L4C feedthrough). No changes: the issue doesn't seem to come from the feedthrough.
4. We swapped the electronics of GS13-V2 and GS13-V3. The issue follows the swap: it doesn't seem to come from the electronics.
Thus no conclusion so far. Please let us know if you have any input. We'll think about it and continue the tests tomorrow.
Find attached a more graphical way to look at all the tests we have done so far.
