Hi Brooke, It looks like I've asked a question poorly, yet again. So, let me try again. I have this idea of combining a DMTD with an SDR. So, said that way, it looks like what I really need is a 2-channel audio SDR. And having said that, maybe what I'm looking for is an external USB sound card. Those I can find. I can probably even figure out how to convert them to DC and supply them with a disciplined oscillator, if needed.
Bob ----------------------------------------------------------------- AE6RV.com GFS GPSDO list: groups.yahoo.com/neo/groups/GFS-GPSDOs/info From: Brooke Clarke <bro...@pacific.net> To: Discussion of precise time and frequency measurement <time-nuts@febo.com> Sent: Thursday, August 11, 2016 1:36 PM Subject: Re: [time-nuts] Low cost SDR suitable for phase noise measurement? Hi Bob: The SDR-IQ has a lower frequency limit of 500 Hz. http://www.prc68.com/I/Bats.shtml#SDRIQ There is a mod that replaces the on board 66 MHz oscillator with one locked to 10 MHz. -- Have Fun, Brooke Clarke, N6GCE http://www.PRC68.com http://www.end2partygovernment.com/2012Issues.html The lesser of evils is still evil. -------- Original Message -------- > A number of posts have appeared about Zynq SDRs on the "Shera revisited" > thread. So, I'd like to ask the more general question: Are there any low > cost SDRs that are suitable for measuring phase noise when coupled with a > DMTD? I believe what I'm looking for is something with enough bits to work > in the audio range down to DC. Yes, I could use a modified sound card, but > I'm really looking for something not sound card related. My thought was to > use a DMTD with a heterodyne frequency of maybe 5KHz. > > Bob ----------------------------------------------------------------- > AE6RV.com > > GFS GPSDO list: > groups.yahoo.com/neo/groups/GFS-GPSDOs/info > _______________________________________________ > time-nuts mailing list -- time-nuts@febo.com > To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > and follow the instructions there. > _______________________________________________ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. _______________________________________________ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.