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Re: GPS disciplined oscillator.


 

Hello Alan

There should not be any 0.5 Hz frequency modulation. If ProgRock2 is set up correctly and on a stable supply in a stable environment, within a few minutes of power up, it should achieve step sizes of 0.027 parts per billion.?

Put another way, if you have it set to 10MHz output, the frequency modulation will be?+/- 0.137 milli Hertz.?

73 Hans G0UPL



On Fri, Sep 1, 2023 at 4:36?PM Alan G4ZFQ <alan4alan@...> wrote:
> I'm wondering if I can use the Progrock2 with the QLG2 to form a GPS
> disciplined oscillator that I can use with my Adalm Pluto requiring
> 40MHz local oscillator?

Roger,

My tests indicated that the PPS modulates the output.
Just a little +/- 0.5Hz, but I'd be wary to use it for a reference.
I have just left it, no further checks, there have been a few other
reports that have not mentioned that, maybe not noticed or not present?
Or, just bad connections?

73 Alan G4ZFQ






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