Hello George,
If you like you can send me the DCF39 USR and i can take a look at it.
It would also be interesting to see the DCF-plot. I know about the
problem with the SSB filter limitation but we could check the DCF
strength anyway, one day DCF the next day me. At least to get a first
impression what the levels are and what the best time may be in the
evening...
73, Stefan/DK7FC
Am 28.10.2012 06:12, schrieb George Szymanski:
Hi Stefan and thanks for the info.
I found how to set the NB on SL!
I'm certainly a newbie, just a few days into the 6 month training
course!!
I get a lot of strong lightning crashes here on 137.
DCF39 was very strong on Friday night and loud in the speaker. Last
night not so strong however but still a very good trace.
Hopefully a good sign of conditions improving at last.
73 de George, DU1GM
On Sat, 27 Oct 2012 23:17:44 +0200, you wrote:
George, Andrej, LF,
I've run a splitted EU-60 grabber window now for some time, waiting
until a relatively weak signal appears to times of high QRN.
Attached is that splitted spectrogram of the grabber, showing "GB" in
QRSS-60 on 136.1698 kHz, by Andrej/EW6GB.
As visible, the spectrograms are taken in Spectrum Lab. The upper half
shows the LF signal without band limiting and noise blanking, as done in
many other programs. The lower half shows the same signal from the same
instance but taken from behind a 2.5 kHz wide band filter and a
noiseblanker.
Without the NB, GB is invisible or not readable. When using the NB, GB
is clearly visible! The effect is impressive when QRN crashes are
strong, nearby thunderstorms and that stuff. In the typical daylight LF
background noise the effect is less expressed.
Yes yes, all this is not new but we have some newcomers on LF and so it
may be useful to demonstrate the effect of the SpecLab noiseblanker.
73, GL, Stefan/DK7FC
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