GM Lubos, VLF,
You are strong visible at OE3GHB and Paul Nicholson. The QRN is pretty
low this morning, just like yesterday. There seems to be a trace
slightly above 8970.04 Hz on my grabber but i still haven't identified
the "K".
There were some changes in the latest SL Version (V2.76b16 and above)
on the noise blanker. I tried to find better settings to bring out a
signal of the noise, without further success. On
http://www.iup.uni-heidelberg.de/schaefer_vlf/DK7FC_VLF_Grabber2.html
you find 2 424 uHz windows running at exactly the same USR file but the
above window is a SL instance with the old noise blanker (b09) and
below you'll find a SL session with the new blanker (b18). It seems the
new version allows a VERY slightly improved signal, in the range of 1
dB or below. So not really a milestone but at least no disadvantage of
the new version and the old USR files. Several parameter adjustments
resulted in worse or equal SNR, so it still seems to be very close to
optimal...
Thank you for the test signal! That applies for Uwe/DJ8WX too, of
course.
Best 73, Stefan/DK7FC
Am 04.05.2011 05:42, schrieb Lubos OK2BVG:
Hello VLF!
The
weather is good, so I will be active on 8970Hz tomorrow:
***INFO***
Date:
04.05.2011
Time:
05:00 UT - 11:00 UT
Antenna:
Marconi L 24m up + 220m top load
PA: 120W
Identification:
K (2x)
Mode: DFCW
3000
FRQ:
8970.040 (+/- some few mHz :-)
Shift:
10mHz
Lubos,
OK2BVG
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