[Lowfer] KFI Captures and stability of AM Stations

[Jay Rusgrove]

Joseph

The RF-590 receiver derives all of its oscillators from the 10 MHz external time base input. I use an
HP Z3801A receiver which has a GPS disciplined 10 MHz oscillator which feeds the RF-590. That leaves
the sound card as the main "unknown". It seems to be quite stable and once the correct offset is
plugged into Argo the system remains in calibration (some hundreths of a Hz) with almost no variation.
Have been wanting to dig into the sound card for some time and see if I can tie that in as well or do
something better. Just haven't had time...maybe this winter...but seem to always end up fooling with
antennas when I can scrounge up spare time.

Jay Rusgrove, W1VD

Joseph DiVerdi wrote:

> At 1:25 PM -0400 8/13/2003, Jay Rusgrove wrote:
> >Les
> >
> >The receiver setup I'm using here has all the oscillators tied to GPS so there
> >is essentially no drift - maybe .02 Hz ... so the signals in the capture below
> >are exactly as they appear. I've monitored a number of am station carriers over
> >the last couple years and many are, indeed, all over the place. Guess that's the
> >beauty of an am detector!
> >
> >http://www.advancedreceiver.com/capture/KFI081003.jpg
> >
> >Jay Rusgrove, W1VD
>
> Dear Jay,
>
> Would you please give some indication on how you tie "... all the oscillators ..." to GPS. Thanks.
>
> Best regards,
> Joseph
> --
> Joseph A. DiVerdi, Ph.D., M.B.A.
> http://xtrsystems.com/           970.980.5868 (voice)
> PGP Key ID: 0xD50A9E33
> _______________________________________________
> >From the Lowfer mailing list
> Send messages to: Lowfer@mailman.qth.net
> To sub/unsub visit: http://mailman.qth.net/mailman/listinfo/lowfer