Re: [IRCA] 1566 TA again

[Guy Atkins <dx@xxxxxxxxxxxxx>]

Hi Nick,

That alternative Perseus software we discussed earlier reads out carrier
measurements to four decimal places. I don't remember the exact, claimed
accuracy at the moment, but I think it was 0.2 Hz. (after auto-calibration
to a station >1000 kHz with a known accurate offset).

73,

Guy Atkins
Puyallup, WA

------------------------------
> Date: Tue, 26 Jun 2012 15:49:48 +0000
> From: Nick Hall-Patch <nhp@xxxxxxxx>
> To: Mailing list for the International Radio Club of America
>        <irca@xxxxxxxxxxxxxxxx>
> Subject: Re: [IRCA] 1566 TA again
> Message-ID:
>        <20120626154953.OZMI14893.priv-edtnes26.telusplanet.net@edtncm02>
> Content-Type: text/plain; charset="us-ascii"; format=flowed
>
> Very nice Guy.     By 0530UT, 1566 was pretty much gone here, so
> maybe you  are getting a better signal at your location.   Now try
> 576, although that faded pretty rapidly after I'd reported it.   The
> irony is that I don't recall these signals at a time of year when
> "conventional" TA reception is more likely.
>
> I didn't realize you could get such accuracy in frequency using the
> Perseus.   I need to do a fair bit of calculation here, fortunately
> using a spreadsheet, to get to within maybe two tenths of a Hertz,
> using an R8, tuning off to one side to give a 400Hz tone, then
> looking at the resultant het with Spectran.
>
> The 1566 carrier appeared to average 1565.9998 here (within that two
> tenths of a Hertz), but was badly smeared over a couple of Hertz, I'm
> guessing due to Doppler shifts in the ionosphere?
>
> Ah yes, extreme minimalist DXing...
>
> best wishes,
>
> Nick
>
>
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