I would be interested in hearing more of the more suitable classes of logic chips. I have a 20Mhz rubidium that I wanted to divide down to 10Mhz
-=Bryan=- ________________________________ From: time-nuts <[email protected]> on behalf of Dana Whitlow <[email protected]> Sent: September 14, 2018 12:55 PM To: [email protected]; Discussion of precise time and frequency measurement Subject: Re: [time-nuts] Programmable clock for BFO use....noise Frequency dividers can be pretty low noise, if you choose the right class of logic. I remember that at one time in the distant past, LSTTL was considered king. Unfortunately I've been out of touch with frequency dividers long enough to be ignorant of what works well today. i'd suggest trying something with either HC-series or AC-series CMOS, chances are fair that you'd be happy. Write me off list and I'll tell you which well-known distributor still has an excellent selection of HC and AC parts in stock. Dana On Fri, Sep 14, 2018 at 11:14 AM, <[email protected]> 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 > _______________________________________________ > time-nuts mailing list -- [email protected] > To unsubscribe, go to http://lists.febo.com/mailman/ > listinfo/time-nuts_lists.febo.com > and follow the instructions there. > _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to http://lists.febo.com/mailman/listinfo/time-nuts_lists.febo.com and follow the instructions there. _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to http://lists.febo.com/mailman/listinfo/time-nuts_lists.febo.com and follow the instructions there.
