[time-nuts] Programmable clock for BFO use....noise

Didier Juges shalimr9 at gmail.com
Sun Sep 16 08:49:20 EDT 2018


Not the same part number but probably similar in terms of performance:

http://www.ko4bb.com/getsimple/index.php?id=microprocessor-crystal-oscillator-comparison

Bottom line: use a true crystal oscillator, or make your own PLL, not a
programmable "microprocessor crystal"

On Fri, Sep 14, 2018, 11:15 AM <lstoskopf at cox.net> wrote:

> Off topic for this list, but you guys are experts in oscillator noise!
>
> Playing with some mechanical filters.  Need USB and LSB crystals for the
> BFO.  No one seems to make crystals anymore, especially in the 253 KHz
> range!
>
> Looking at the DigiKey Cardinal programmable oscillators.  Cheap and
> available: CPPC1LZ A5B6
>
> Anyone have an idea how noisy these would be after a division by 4 to get
> them in range?
>
> Thanks,
>
> N0UU
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