Following steps on service decission tree: it seems to have proper signal forms and values. As you see in the photos of my scope, signals described in the service captures attached are present, but no continously. Then the A9 board is working properly, because when reset the unit, that sawtooth-like waveform is continous for a split second. Thus, entering center frequency manually and playing with [RESET] button, the counter start counting.
A big relief that the sampler is ok. That's for sure.
I think the problem is in the A10 (phase detector/divide-by-N assembly) because the delta phase signals 1 and 2 are not continous.
If you have a 5342A and can measure TP1 at A9 for me to confirm that sawtooth must be continous while the unit is sweeping the synthesizers, would be very helpful ;)
Regards
RubenRubio
