Post by Pete LancashireAccess to " the xtal" is not an option the SDR is enclosed in a metal box.
Do a web search for RSP2Pro
It does have an external reference input..
There's not a lot of info on the Mirics data sheets (or on the sdrplay
website)
It sort of looks like this is a somewhat enhanced version of the parts
used in the RTL-SDR dongles.
(10 bit ADC, instead of 8 bits in the RTL2832)
And of course it needs 24MHz because it has to run the USB interface.
10 bit ADC means that you probably don't need *outstanding* clock
performance - the sample and hold and all the other timing logic is
probably designed to that sort of performance level - getting
femtosecond jitter probably isn't worth it.
If you're just looking for a 24 MHz driver that doesn't need to be
locked to anything, one of the SiTime modules would work, or you could
probably order a TCXO for 24 MHz - it's a standard frequency (viz. USB),
so it's almost certainly available from stock
Post by Pete LancashirePost by Attila KinaliOn Wed, 11 Apr 2018 03:00:23 -0700
Post by Pete LancashireNeeded 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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