aLIGO LHO Logbook

H1 AOS

giacomo.ciani@LIGO.ORG - posted 08:57, Wednesday 29 August 2012 - last comment - 12:46, Thursday 30 August 2012(4023)

HAUX: small progress towards testing

[Alex, Deepak, Cheryl, Giacomo]

Yesterday we finished alignment of the remaining 2 HAUX. All 4 are aligned and hooked up.
The optical lever setup is in place, but no pitch balancing has been done yet.

Electronics is up and running, the model has been restored to a clean working state after reboot, and BURT saved:
- all OSEMs offsets and gains set
- Damping filter set to (what I think are) reasonable values (no much though on this as of now: they just work to damp the optic) and set to the off state
- Hardware LP filter set to ON (but see later)
- Coils TEST enable flag set to 1.
- Master switches are off

Note that although the hardware for binary IO is on, apparently there is no state change when we change the flags in the software. It is not clear if status is not changed, or if is changed but not reported. This will need to be investigated this morning.

Comments related to this report

filiberto.clara@LIGO.ORG - 12:46, Thursday 30 August 2012 (4031)

Link

Added missing (Binary) cables in rack SUS-C3, from IO chassis (FE IO Chassis 2 HAM-A Controls) to Binary Input and Output Chassis. This only solved part of the issue, since the Enable and Disable bits were not switching. Opened up HAM A Coil Drivers and removed jumpers for Disable / Enable. With the jumpers in place, the state would not change regardless of input. No jumpers should be installed in P3 and P4. 

All four HAM-A Coil Drivers had the jumpers removed. 
S1201163
S1201160
S1201158
S1201161