[time-nuts] suggestions on getting 24 Mhz ?

Pete Lancashire pete at petelancashire.com
Mon Apr 16 06:45:38 EDT 2018


Access to " the xtal" is not an option the SDR is enclosed in a metal box.

Do a web search for RSP2Pro



On Sun, Apr 15, 2018, 6:00 AM Attila Kinali <attila at kinali.ch> wrote:

> On Wed, 11 Apr 2018 03:00:23 -0700
> Pete Lancashire <pete at petelancashire.com> wrote:
>
> > Needed for SDR project as external clock source.
>
> If your goal is, as Jim guessed, to get 24MHz from 10MHz and
> you are using something like an RTL-SDR, then how about just
> passing the 10MHz through a CMOS gate to square it up and
> get nice harmonics, then pass a wire close to the crystal.
> This should injection lock the crystal to right frequency.
> It wont be a strong lock due to the 5:12 ratio, but for something
> like a crystal that is already quite close, that should do the trick.
>
> Alternatively, using an ADF4002 with a small uC to configure it
> and a VCXO/VCO should also work.
>
>                         Attila Kinali
> --
> <JaberWorky>    The bad part of Zurich is where the degenerates
>                 throw DARK chocolate at you.
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