Reports until 17:41, Wednesday 17 January 2018
H1 SQZ
daniel.sigg@LIGO.ORG - posted 17:41, Wednesday 17 January 2018 - last comment - 11:15, Thursday 18 January 2018(40161)
Sqz Fiber Trans PD

The gain selection doesn't seem to work for the Sqz Fiber Trans PD.

Comments related to this report
marc.pirello@LIGO.ORG - 11:15, Thursday 18 January 2018 (40172)
Link

The signal is not reaching the AUX 7 chassis at HAM 6.  The following voltages were observed on the chassis.

  1. Pin 7 (PD3:  SQZ_FIBR_TRANS Gain 0) 1.53V when connected, 5V when disconnected
  2. Pin 26 (PD3: SQZ_FIBR_TRANS Gain 1) 1.51V when connected, 5V when disconnected
  3. Pin 8 (PD4: SQZ_SPARE_B Gain 0) 1.5V when connected, 5V when disconnected
  4. Pin 27 (PD4: SQZ_SPARE_B Gain 1) 1.5V when connected, 5V when disconnected

Each of these signals originates at the same terminal, EL2124 in slot13 of Squeezer Control Chassis 3.

Best guess, either software initialization failure or a bad terminal.

edit: Or incorrectly connected power supply!