Reports until 16:54, Tuesday 22 April 2014
H1 SUS
filiberto.clara@LIGO.ORG - posted 16:54, Tuesday 22 April 2014 - last comment - 19:03, Tuesday 22 April 2014(11514)
ETM UIM Coil Drivers 
Modified the output stages of the ETM UIM coil drivers, to give a factor of 4 more range per ECR E1400164.

All four channels of each unit were modified as followed:
R10 & R15 were changed to 2.2K Ohm
R5  & R23 were changed to 2.0K Ohm 

Unit from EX - S0900303
Unit from EY - S0900304
Comments related to this report
arnaud.pele@LIGO.ORG - 19:03, Tuesday 22 April 2014 (11518)
Link

The theoretical transconductance (@ DC) for each channel in the "High Dynamic Range Mode" is 0.625mA/V = -64dB Amps/Volt (from p2 of T140023 assuming a maximum 10V input).