R&D (FilterCavity)
MarcEisenmann - 19:02, Tuesday 28 May 2024 (3570)
Comment to DDS2 issues investigation (Click here to view original report: 3560)

[Logan, Marc]

We added one of the 2 remaining RF amplifier to the 500MHz clock output.

We soldered it to the NIM rack +12V and ground used for the LNVR. Note that we could have tried to use the +12V from the LNVR but were a bit worried to further damaged the clock..

The output of the clock is now +7.9dBm.

The output of the following splitter are

1 : -1.73dBm ; 2 : -6.19 dBm ; 3 : -5.09 dBm ; 4 : -5.33 dBm

Finally, we connected DDS2 to each output of the splitter and checked the signal output from DAC0.

We got about -9 dBm from all.

Next steps are fixing the clock crystal (was not fixed anymore) and the RF amplifier ; recover the electronic connections and recover squeezing.