[Lowfer] WSPR comparison at 474.2 kHz

[Douglas Williams]

Does WSPR2.0 decode WSPR-15 signals?

On Thu, Dec 10, 2015 at 7:25 AM, Garry <k3siw at sbcglobal.net> wrote:

> I've been running WSPR-X v0.8 to decode 474.2 kHz WSPR transmissions for
> some time now. But I noticed that weak waterfall signals that seemed strong
> enough to decode often did not. So last night I simultaneously ran WSPR
> v2.0. WSPR-X results were uploaded for the call K3SIW and WSPR2.0 results
> were uploaded for the call K3SIW/1.
>
> Both were driven by an eprobe up about 10' in the back yard to an
> externally clocked SDR=IQ and DELL3020 Win 7 64 bit PC. The resulting
> decodes were generally within 1 dB SNR of each other and a few tenths of a
> second in timing. However, as noticed before, WSPR2.0 picked up a number of
> SNR cases around -28 dB SNR and even less that WSPR-X failed to decode. On
> the other hand, WSPR-X only false decoded WH2WSX (this was in good company
> with a lot of other reporters) while WSPR2.0 had two egregious false
> decodes (IB8HFK and Q55KRL), as well as WG2XXO (which also has been false
> decoded by others).
>
> Seems that the extra sensitivity of 2.0 comes at the expense of reduced
> credibility.
>
> 73, Garry, K3SIW, EN52ta, Elgin, IL
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