Stefan
Good T/A copy of your WSPR-32 transmission ... unfortunately no reception of DF6NM. All available
time slots were received.
05:30 DK7FC 0.136164 -16 0 JN49ik +30 1.000 W1VD FN31ls 6099 3790 2012-09-24 04:30
DK7FC 0.136164 -20 0 JN49ik +30 1.000 W1VD FN31ls 6099 3790 2012-09-24 03:30 DK7FC
0.136164 -25 0 JN49ik +30 1.000 W1VD FN31ls 6099 3790 2012-09-24 02:30 DK7FC
0.136164 -21 0 JN49ik +30 1.000 W1VD FN31ls 6099 3790 2012-09-24 01:30 DK7FC
0.136164 -23 0 JN49ik +30 1.000 W1VD FN31ls 6099 3790 2012-09-24 00:30 DK7FC
0.136164 -19 0 JN49ik +30 1.000 W1VD FN31ls 6099 3790 2012-09-23 23:30 DK7FC
0.136164 -21 0 JN49ik +30 1.000 W1VD FN31ls 6099 3790 2012-09-23
The database appears to have all my receptions although it's operation has been
intermittant lately.
Jay W1VD WD2XNS WE2XGR/2
----- Original Message -----
From: Stefan Schäfer
To: Chris Gomoiu
Cc: [email protected]
Sent: Sunday, September 23, 2012 6:02 PM
Subject: LF: SL NB in WSPR-32 ?
Hello Chris,
I wonder if there could be an improvement by using the SpecLab noise reduction technics in series to
the audio line to the WSPR program.
Would you like to try that? For me it makes no sense, because Markus is +10 dB
S/N here ;-)
You're already running the EU60 SL instance. This one adds a bandpass of about 2.5 kHz width to the
wideband spectrum of your receivers in 4X and YO. Behind this filter there is the Noiseblanker which
improves QRSS/DFCW reception by at least 6 dB at nighttime, as we know. If you put the sound output
of this SL instance to VAC2-in and define it VAC2-out as the standard audio device, then it should
work. Of course the sound output in SL must be enabled.
If WSPR limits the input spectrum to 200 Hz, like we do in the IQ soundfile generated by sndinput,
then there can't be adequate sferic blanking because 200 Hz is to narrow. Sferic blanking may be not
such an advantage on HF, at least on the higher frequencies.
It would be interesting to see the difference. Maybe it makes things worse but
i can't imagine.
What do you and Markus and others think?
73, Stefan/DK7FC
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