Looking over the results from the Serial Bus Test .
Most of the Test Point measured voltages on the A-8 Fractional-N Board are wrong except the +5Vdc Supply Voltage, +15 Current Draw and PreTune Buffer Output.
VCO Tune Voltages, ALC DAC Voltage,? VCO Compensation, all out of range.
?
The 30kHz Phase Detector and 30kHz Phase detector Integrator on A-11 Phase Lock Board, used only by Band 0, are all fed by the A-8 Board 150MHz circuit.
?
I would think looking for a new A-8 Board is my only option.
And possibly change the OCXO to one in spec.
I did feed an external 10.000004 reference into the back BNC but it didn't make a difference to 5Mhz, which is Curious.