Hi Martin,
Or maybe you're using a USB soundcard sampling at 48kS/s and your PC is
set to 44.1kS/s, giving a certain frequency offset?
73, Stefan
Am 17.10.2015 22:11, schrieb Martin Evans:
Ah - thanks Marcus.
This gives me somewhere to start looking!
Martin GW3UCJ.
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Hi Martin,
version r3058 is working fine
here. The issue could perhaps be
related to samplerate deviation. WSPR v2.11 sets up the soundcard
at 48000 samples/second whereas WSPR-X is asking for 12000 s/s. Usually
the ratio between the delivered samplerates is an accurate factor of
four, but it depends on the soundcard driver. More than half a
percent error will upset the symbol timing enough to render decoding
impossible. You could check it by injecting a known audio tone
and looking at the frequency in the wspr-x spectrogram.
Best 73,
Markus (DF6NM)
Sent: Saturday, October 17, 2015 8:30 PM
Subject: LF: WSPR-X
I've tried and tried to get WSPR-X V0.8 r3058 to decode - I'm trying
now, on 474.2kHz.
Good strong signals on the waterfall, computer time synched using
Dimension 4, but absolutely no joy at decoding.
Is there a secret to this - the older WSPR 2.0 works fine.
Or is there a later version that actually works?
Martin GW3UCJ Swansea.
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