Stefan
Just reading
your email and the later correction
for 10 minutes. Will need some setting up.
OK I will
give it a try.
It is now
15:14 UTC
73 Terry
Hi Terry, Jay, Joe, LF,
Thank you Terry, you didn't miss any WSPR-32 transmission! :-) Also
thanks to
Jay for providing the useful data from the transatlantic path! Here the
results
are looking most promising as well. Sri for the non decodes of DF6NM.
But maybe
in the next test!
The SNR levels are very high.
I would like to evaluate the effect of sferic blanking to the WSPR
signals and
its performance. If sferic balnking, done in SpecLab, improves the WSPR
performance significantly, then this may be important for Joe and the
new JT8
mode which is intended for MF/LF where QRN is much more dominant and
aggressive
than on 20m or so.
For the next test i suggest to use WSPR-8 again, on the same QRG. I
shall
reduce the power level by 20 dB. Then Terry, i would like to have an
audio
recording, a wav file generated in SpecLab. If possible, my signal
should be in
the center of a SSB filter bandwidth (or wider), directly coming from
the
soundcard. Timing is critical again. You must start the recording
exactly when
my transmission begins and it must be stopped after exactly 8 minutes!
Then you
can pass me the file in Dropbox.
I will then replay the file in SpecLab, in an endless loop. First i
will use
the file as it is, to confirm the decoding works and the decode levels
are
always the same. Then, i will add a 2.5 kHz bandpass and apply sferic
blanking
by using the SL noise blanker. In QRSS/DFCW this makes a subjective
improvement
of 6...10 dB, depending on the noise levels.
If we can get another 6 dB by that, then is assume that W1VD will
successfully
decode DF6NM, which would be a nice confirmation.
Jay, the DST levels according to http://lasp.colorado.edu/space_weather/dsttemerin/dsttemerin.html
must have been very good for transatlantik LF work, right?
Jay, would you like to try run the WSPR (including the add-on tools
from
Markus) "behind" the band filter and NB that you're using to display
the EU60 band on your grabber tonite?
First i have a "onw-way-sked" with Martin
and also try to leave traces at http://icas.to/argo/eu.htm
in QRSS-120. Conds are excellent! Later i would send some sequences in
WSPR-8.
For the recording and tests, it may anyway be better to use the typical
night-QRN when the band is opened between Terry and me...
Terry, OK?
For testing and comparing night time QRN levels and daytime groundwave
QRN/QRM
levels and the difference of sferic blanking it may be even useful to
have 2
recordings. Thus i will NOW
start
to run the TX in WSPR-8 with a 20 dB lower LF signal compared to the
typical
values. I'll run the beacon in 100% mode so that Terry or someone else
can
easily take the recording (if you like to participate in the test). The
beacon
runs until about 17 UTC, then i have to QSY to QRSS-120.
73, Stefan/DK7FC
Am 24.09.2012 09:38, schrieb Terry GW0EZY:
Stefan/Markus
Full
decode list as
nothing was uploaded to WSPRNet (1530-1630 adjusting dial QRG)
UTC
1530
5
0.6 0.137987 0 DK7FC JN49 30
1600
-6
0.2 0.136181 0 DF6NM JN59 27
1630
6
0.2 0.136167 0 DK7FC JN49 30
1700
-6
0.2 0.136165 0 DF6NM JN59 27
1730
6
0.2 0.136164 0 DK7FC JN49 30
1830
3
0.0 0.136163 0 DK7FC JN49 30
1900
-7
0.0 0.136164 0 DF6NM JN59 27
1930
1
0.1 0.136163 0 DK7FC JN49 30
2030
2
0.1 0.136163 0 DK7FC JN49 30
2100
-9
0.1 0.136164 0 DF6NM JN59 27
2130
5
0.2 0.136163 0 DK7FC JN49 30
2200
-9
0.3 0.136164 0 DF6NM JN59 27
2230
2
0.1 0.136163 0 DK7FC JN49 30
2300
-3
0.0 0.136164 0 DF6NM JN59 27
2330
2
0.2 0.136163 0 DK7FC JN49 30
0000
-5
0.1 0.136164 0 DF6NM JN59 27
0030
3
0.1 0.136163 0 DK7FC JN49 30
0100
-11
0.1 0.136164 0 DF6NM JN59 27
0130
1
0.0 0.136162 0 DK7FC JN49 30
0200
-6
0.0 0.136164 0 DF6NM JN59 27
0230
4
0.1 0.136162 0 DK7FC JN49 30
0300
-10 0.0
0.136164 0 DF6NM JN59 27
0330
-2
0.1 0.136162 0 DK7FC JN49 30
0400
-16
0.1 0.136163 0 DF6NM JN59 27
0430
3
0.2 0.136162 0 DK7FC JN49 30
0500
-9
0.2 0.136163 0 DF6NM JN59 27
0530
4
0.3 0.136162 0 DK7FC JN49 30
0600
-9
0.2 0.136163 0 DF6NM JN59 27
73
Terry
Am 24.09.2012 13:24, schrieb [email protected]:
Stefan
Good T/A copy of your WSPR-32 transmission ... unfortunately no
reception of
DF6NM. All available time slots were received.
2012-09-24 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
The database appears to have all my receptions although it's operation
has been
intermittant lately.
Jay W1VD WD2XNS WE2XGR/2
