[Lowfer] Spectrum Lab as LORAN receiver

[Stewart Nelson]

When you type into the LO frequency box, the number is rounded to
the nearest 0.1 Hz for display, but the actual frequency seems to
be affected by any additional decimal places.

I would not advise lying about the sample rate, because with high
averaging, this needs to be quite accurate also.

Sorry that I don't have a cure for receiver drift.  A tool designed
for propagation monitoring would, of course, have PLLs to lock both
frequency and time.

73,

Stewart

----- Original Message ----- 
From: "Lyle Koehler" <lyle@mlecmn.net>
To: <lowfer@mailman.qth.net>
Sent: Thursday, January 01, 2004 7:58 PM
Subject: Re: [Lowfer] Spectrum Lab as LORAN receiver


> Thanks for the explanation, Stewart. The advantage of the SSB technique is
> quite significant. But I'm still having trouble "zero beating" the audio
> carrier. As far as I can tell, the smallest frequency step for the local
> oscillator in SpecLab is 0.1 Hz, and that doesn't seem to be good enough
> when I use large numbers for signal averaging. I have played a little with
> the sampling rate calibration, which may offer much finer resolution, but
> it's hard to tell when the settings are correct. And if I finally get it
> right, the darned receiver will drift :-(
> 
> Lyle