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Stefan
Thanks for the info and other spots -40 or lower.
No QRM here to speak of ... just normal levels of static. Was pretty
impressive to get a decode with next to nothing showing in the
waterfall. Don't think I've gotten a decode in the past with that little
showing. Have made some RX antenna changes so hoping they translate to
better weak signal performance.
Jay
----- Original Message -----
Sent: Saturday, September 28, 2013 8:28
AM
Subject: Re: LF: DK7FC WSPR15
Hi Jay, LF,
Am 28.09.2013 03:06, schrieb [email protected]:
Stefan
Memory fuzzy here ... not sure if I've seen a -40
snr on your signal in the past. Do you recall?
2013-09-28
00:30 DK7FC 0.137610 -40 0 JN49ik
1 W1VD FN31ls 6099 295
Jay W1VD
WD2XNS WE2XGR/2 WG2XSR/2
Yes i do. When you search
the database for my call, last 2 weeks and sorted by SNR you will see that -40
is rare. But even -41 is possible! See:
| Timestamp |
Call |
MHz |
SNR |
Drift |
Grid |
Pwr |
Reporter |
RGrid |
km |
az |
| 2013-09-25 00:00 |
DK7FC |
0.137610 |
-41 |
0 |
JN49ik |
1 |
RW3ADB |
KO85ro |
2045 |
59 |
| 2013-09-26 21:00 |
DK7FC |
0.137610 |
-41 |
0 |
JN49ik |
1 |
RW3ADB |
KO85ro |
2045 |
59 |
| 2013-09-23 17:00 |
DK7FC |
0.137610 |
-40 |
0 |
JN49ik |
1 |
SV8RV |
KM07ks |
1621 |
139 |
| 2013-09-25 22:00 |
DK7FC |
0.137610 |
-40 |
0 |
JN49ik |
1 |
4X1RF |
KM72ls |
2850 |
121 |
| 2013-09-21 18:00 |
DK7FC |
0.137610 |
-40 |
0 |
JN49ik |
1 |
R3LW |
KO54mq |
1626 |
60 |
| 2013-09-18 19:00 |
DK7FC |
0.137610 |
-40 |
0 |
JN49ik |
1 |
RW3ADB |
KO85ro |
2045 |
59 |
| 2013-09-23 06:30 |
DK7FC |
0.137610 |
-40 |
0 |
JN49ik |
1 |
UW8SM |
KN28iv |
1163 |
87 |
| 2013-09-28 00:30 |
DK7FC |
0.137610 |
-40 |
0 |
JN49ik |
1 |
W1VD |
FN31ls |
6099 |
295 |
RW3ADB usually
has rather poor RX results (often 10 dB lower SNR than other RX stns close to
him). That supports my thought that the decode level appears even lower if
there is QRM in the passband.
One could make a test: Use a white noise
generator with a high level and a notch at 136.610 Hz (my TX QRG), maybe 10 Hz
notch BW. My signal must be close to the decode limit. The rest of the 200 Hz
wide passband of WSPR should be covered with noise, maybe 20 dB above my
signal. Theorectically there should be a decode but the SNR must be terrible,
maybe you can get -42 dB SNR. That would be a new record, hi :-)
73,
Stefan/DK7FC
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