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Hello Stefan,
Thank you for sharing your experience. This
is particularly important for newcomers in this band. They will throw the towel down to quick if they find nothing in the
Spectogram's.
I'm busy to decode a 2GB WAV recording that I
made yesterday. But still nothing on that Acer S235 notebook. When I load
VLF_stations.usr, the whole VLF becomes visible. So that works well, but
unfortunately no sign of DJ8WX. I try now if I can see
RSDN-20
To be continued....
73's, Peter PA1SDB
---- Original Message -----
Sent: Monday, March 25, 2013 11:03
AM
Subject: Re: LF: No succes Sub9KHz and
S235 notebook here....
Hi Peter,
I know these problems. For a longer time i
had problems on the TX side on LF (generating tones to the TX converter).
Several phase glitches occured in a 30 minute period. In 424 uHz the S/N loss
would be dramatic then.
Ah yes and i remember the same problem while
transmitting 8970 Hz in my 10th kite experiment.
A screenshot of my
transmission in 40.0 km distance and in 4.5 mHz: https://dl.dropbox.com/u/19882028/VLF/DFCW-600_DK7FC_10thEXP.jpg
Here
another one in 45 mHz ("DFCW-60"): https://dl.dropbox.com/u/19882028/VLF/DFCW-60_46607.jpg
You can clearly see the glitches.
And lastly the signal at TF3HZ https://dl.dropbox.com/u/19882028/VLF/DK7FC110206.jpg
Here it is very blurry as well.
The same can happen on the RX side of
course. As a test you could track the signal of RSDN-20, e.g. on
11904.7619 Hz. This must be a stable line, over the day, except a single
glitch at 21 UTC (?). All other glitches that appear in this line must be
generated on your side!
See the RSDN-20 window on my grabber http://www.iup.uni-heidelberg.de/schaefer_vlf/DK7FC_VLF_Grabber.html
(The trace is sometimes affected by my own LF/MF transmissions).
73,
GL, Stefan/DK7FC
Am 24.03.2013 15:46, schrieb PA1SDB, Peter:
Hello all,
I have here a ACER Extensa S235
notebook.
I have "some" experience with Sub9KHz and spectrum
lab, but with this notebook I am unable to receive signals from DJ8WX right
now.
Experiments in the past did also fail. I see
other signals between 0 and 48 KHz, but no sign from
DJ8WX.
I use the same scipt like I run on my
Grabber PC (www.qsl.net/pa1sdb) but around 8970 Hz is only
noise visible in Spectrum lab.
For some unknown reason it is an experiment worth to try another PC if you get
succes.
Still digging here to find out why it
does'nt work...
73's, Peter
PA1SDB
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