Hi Just to clarify:
You are looking for a way to digitize the output(s) of the mixer(s) in a DMTD. The “target signal” is in the 1 to 10 Hz range. Is that correct or are you looking for something to use instead of a DMTD? Bob > On Aug 11, 2016, at 3:29 PM, Bob Stewart <b...@evoria.net> wrote: > > 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. _______________________________________________ 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.