(Jax, Daniel)

Today we measured the RF levels in the ISC field and remote racks at EY and set nominal RF values in the MEDM interface. 

Installed attenuators by cable number:

2dB: 

18-1B2 (RF to phase modulator), 18-1, 13B (RF Preamp to Phase/Freq Discriminator), 14-2B (RF to VCO), 19-1 (71 MHz RF Dist. Amp to Oscillator), 14-1 (24.4 MHz RF Dist. Amp to Oscillator)

3dB: 

16-1 (Freq Divider to Phase/Freq Discriminator)

8dB:

17-1 (VCO to Freq Divider)

15 dB*:

18-5B (RF to VCO)

*Here we would have preferred 12 dB to be consistent with EX as per alog 9466, but didn't have one on hand in the big box o' attenuators.

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During this process, we discovered the delay line had no output. After cracking it open, we found that one of the ICs (U22) had fried in spectacular fashion - likely a victim of an upside-down power cable at some point. I grabbed a spare (S1103442) from MY, gave it a quick once-over to make sure it works, then installed it at EY.