VTRx OH129
On April 19-20th of 2021, the RSSI current was monitored for the VTRx in GBT0, GBT1, and GBT2, of OH129 in detector GE11-X-S-FIT-0002 (Bottom layer SCS027 extracted from P-17@P5). After 24h of monitoring, the RSSI currents were not stable, instead of that, VTRx0 and VTRx1 fell below 50 uA.
Then the three VTRx were replaced: VTRx on GBT0 → removed 209764 , Inserted 209778 VTRx on GBT1 → removed 215238 , Inserted 209779 VTRx on GBT0 → removed 209237 , Inserted 209780
Initially the RSSI currents observed for the new set of VTRx were very low (~60 uA instead of 300uA ), but after cleaning the fibers carefully, RSSI values became normal.
The new set of VTRx, showed stable RSSI currents in 24 hours of monitoring.
Edited by Johny Jaramillo