marc.pirello@LIGO.ORG - posted 15:12, Tuesday 13 November 2018 - last comment - 14:54, Thursday 15 November 2018(45258)
PFD and IQ Demod Upgrades complete in Corner
The phase frequency discriminator (PFD) and both IQ demodulators in the corner have been upgraded with the local oscillator (LO) modification and in the case of the IQ Demods their power interface board has been upgraded to allow more readbacks. End Stations and and some spares remain to be upgraded.
S1000771, S1000772 Demods
S1000761 PFD (this was completed here ALOG43041)
I verified that the I outputs of the demodulators for REFL_A and REFLAIR_A are hooked up as I channels in the DAQ. For both demodulators the I channels is sent to the summing board. This is consistent with alog 44378.
I also verified that the remote controls for the IMC-REFL/LSC-REFL_B dual delay line phase shifter are working correctly.
Continuing work on this, all installed chassis have been upgraded.
End X PFD - S1000758
End X Demod - S1000778
End Y PFD - S1000759
End Y Demod - S1000779
Spares are still being worked on awaiting parts.