You need to be able to measure frequency accurately in the milli-Hertz range to be competitive in the frequency measuring contests.
I doubt the Selective Voltmeters have that level of resolution. I think they 'only' read to 0.1 Hz. --- Graham On Mon, Jun 20, 2016 at 11:52 AM, Pete Lancashire <p...@petelancashire.com> wrote: > Never tried it but a Selective Level Meter aka HP 3586A/B/C ? > > On Mon, Jun 20, 2016 at 7:51 AM, Nick Sayer via time-nuts > <time-nuts@febo.com> wrote: > > I'm considering taking a shot at the next ARRL frequency measurement > contest. > > > > The assumption going in is that the signal is CW, with at least a half > minute or so of just solid "on" at one point or another and that reception > is reasonably good. > > > > I've got a good TIA and excellent references, but that's the easy part, > it seems to me. It seems to me that what I really need to do is make a > synthesized heterodyne receiver that can present an accurately tuned RF > band pass - say, 10 kHz wide with the synthesizer set for > > 5 kHz steps - to the TIA, with some manually tunable high-pass and > low-pass filtering to isolate the signal of interest. If the mixer got its > LO from a synthesizer with a GPSDO reference, it seems to me that you could > then measure the frequency of the signal of interest (now an audio > frequency, so you can listen to it too) with the TIA (also getting the > GPSDO reference) and then do simple math to arrive at the actual RF > frequency. > > > > Anybody have any thoughts? > > > > > > Sent from my iPhone > > _______________________________________________ > > 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.