[time-nuts] HP 5061A problem

[Adrian]

Corby,

yes, the green light comes on, but when I turn the osc. fine control by 
more than +/- 30, it goes off.
The output frequency changes with the fine adjust, so that narrow range 
appears more like a pseudo lock indication. I can even unplug A8P6 and 
the green light is still on.
Output from the phase detector is there, but the oscillator control 
instrument doesn't show any significant move.

The 2nd harmonic meter reading is near full scale.

I'm suspecting a problem with the OP Amp. It does not work as described 
in the functional test.
And, when I apply DC to the input at A8P6, the control voltage shows 
only a small jump and goes slowly back to the initial value. That's not 
exactly what I expect from an integrator.

Adrian


cdelect at juno.com schrieb:
> Adrian,
>
> You say it does  not lock.
>
> When you put in operate and push the logic reset button does the green
> light come on?
>
> What is the 2nd harmonic meter reading?
>
>   If too low the logic will not turn on the green light. Raise the reading
> via the A7 gain adjust thru the front panel hole.
>
> Is the green light burnt out?
>
> In operate and looking at the control voltage on the meter does the
> control voltage "follow" a slow adjustment back and forth of the fine
> Quartz adjust?
>
> Corby
>
> _______________________________________________
> time-nuts mailing list -- time-nuts at febo.com
> To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
> and follow the instructions there.
>