daniel.sigg@LIGO.ORG - posted 14:38, Tuesday 01 March 2016 - last comment - 15:38, Tuesday 01 March 2016(25808)
OMC PZT dither / OMC DCPD bias changes
(Fil Keita Daniel)
OMC PZT dither: change cap for 1000 less analog gain. Issue 1208, ECR TBD. Done
OMC DCPD bias voltage: increase bypass caps on power supply. Issued 1207, ECR E1600061. Done
H1:OMC-LSC_OSC_CLKGAIN was increased by a factor of 10 (from 600 to 6000) as the old resistive divider was providing a factor of 100, not 1000.
Units modified are listed below:
1. OMC PZT Dither Modification (HV power supply set to 100V, 80mA)
Chassis D1300485 SN S1301298
Board SN S1301288
2. OMC DCPD Bias Voltage Modification
Chassis D1300520 SN S1101603
Board SN S1301540