filiberto.clara@LIGO.ORG - posted 13:29, Tuesday 24 July 2018 (43036)
QPD Transimpedance Amplifier / Electric Field Meter (EFM) Chassis
Interface board replaced with v6 board. New board has whitening/gain for EFM signals. EFM gain increased:
R10/R16 changed to 10K
R14 changed to 4.99K
With ion pump replacement going on at EX, we decided to leave the ±18V going into chamber off.
S1102829 - Chassis
S1800797 - Interface board