[time-nuts] Re: 10 MHz TCXO periodically jumping 20 mHz up and down

[glen english LIST]

Andy, do you have the PIC and the synthesiser chip data control lines 
well buffered/isolated (nice big resistors etc on the data lines ?)

Any sort of current you inject into the synth chip will find its way 
onto the output....

On 19/02/2022 7:55 pm, Andy Talbot wrote:
> A while back I purchased a low cost TCXO which I then used as the reference
> for a synthesizer generating 10GHz.  Listening to the output on an SSB
> radio, the tone was hopping in a random fashion over four frequencies,
> spaced a few tens of Hz apart.   This was surreal!  I had, at that time,
> been building Multifrequency Shift Keyed data sources ( for WSJT modes) by
> programming synths directly, but this wasn't the case here.   Yet the
> hopping tones sounded just like the modulation I woul