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In PMCC click on the “Focus Cabin Switches”. Make sure “13MM Rx” and “F/C Synthesisers” are both on - see below. If F/C Synthesisers are not on, wait ~ 1min before trying to set any of the LOs.
In PMCC “show” the 13mm Rx settings. Ensure LNA “A” and “B” and on and Noisecal is “active”.