jeffrey.kissel@LIGO.ORG - posted 11:42, Wednesday 24 January 2018 - last comment - 12:46, Friday 26 January 2018(40254)
ZM2 Fully Functional, Doesn't Care Whether Sat Amp Jumpered to AOSEM or BOSEM Configuration
J. Kissel, R. McCarthy, M. Pirello FRS Ticket 9771 After solving all of ZM2's signal chain problems (all of which were mis-jumpered boards inside its new HAM-A coil driver and US Sat Amp, see LHO aLOG series starting with 40237), I'd accidentally told Marc to jumper the SatAmp to the AOSEM setting (ZM2, an HTTS, uses BOSEMs). He's jumpered it to the BOSEM setting this morning, so I've taken another diagnostic suite. Turns out, though the OSEM sensor response dropped by an inconsequential ~13%, ZM2's BOSEMs don't care whether they're read out with a Sat Amp jumpered in the AOSEM or BOSEM configuration. Richard and I recall that perhaps all US sat-amps are jumpered to the same configuration, because (as Richard specifies) one species of OSEM doesn't use the feature implied in that configuration, it just needs to be jumpered to either/or. So we recall having set all US sat-amps one way (or the other). We'll figure out which (by checking the OMs and RMs), and set all the new US Sat Amps (for OFI, ZMs, and VOPO) the same way. For all intents and purposes, ZM2 is now fully functional.
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J. Kissel, M. Pirello, R. McCarthy Marc has verified that all US Sat Amps are jumpered to the BOSEM position. As such, we need not make any change to the current configuration of the Sat Amp, and we should consider the electronics and suspension in its final functional state. Thanks for all your help Marc!