Uwe,
The QRN was very low this morning! Have you been on air? It would be
good to observe the QRN situation just like the WX situation before
starting a transmission because both decides if a decode is possible :-)
73, Stefan
Am 12.04.2016 17:50, schrieb [email protected]:
thanks, Stefan.
the carrier is on the air.
the message:
start
2016-04-13 07:00:00
coding 8K19A
CRC 16
period 30
length 5
duration 04:16:00:00
Have
fun agn
Uwe/dj8wx
Uwe, your transmissions are
very interesting. I'm looking forward to receive the 5 char message at
30s. We can try 25s symbols later :-)
73, Stefan
Am 11.04.2016 19:05, schrieb [email protected]:
Thanks, Paul.
Congrats to Stefan
and Markus.
The EbNaut Sender
is prepared for length 5, retaining period 30.
But: this afternoon the sky suddenly
turned from blue to dark grey, so possibly the TX stays off.
We will see.
Uwe
Uwe,
... me too ;-)
I was actually surprised about the successful decode because the
nighttime carrier was well visible in Heidelberg but not at all in my
spectrogram.
Anyway both our
decodes were close to the limit, so for the next step I would suggest
to try 5 char but stay with 30 sec symbols. Due to the FEC and CRC
overhead, going from 3 to 5 characters (1.667 x payload) will increase
the total time only by a factor of 1.23 so we already loose 1.32 dB
sensitivity. Shortening the symbols from 30 to 20 seconds would cost
another 1.76 dB.
All the best,
Markus (DF6NM)
-----Ursprüngliche Mitteilung-----
Von: DK7FC <[email protected]>
An: rsgb_lf_group <[email protected]>
Verschickt: Mo, 11 Apr 2016 2:56 pm
Betreff: Re: VLF: 8269.990Hz
Hello Uwe,
Thanks for the VLF transmission. No problem to decode the message! See
attachment.
If Markus can decode and no other station wants to try, maybe we can
try 20s symbols and 5 characters, your callsign for example :-)
As you probably saw, i saw your carrier on 8269.99 Hz in my 6000 window
in the city but not in the forest. Either it is a propagation
phenomenon that i don't understand yet or there is still something
wrong with the drift calibration. I will today go on the tree again to
re-configure the GPS-module and see if this makes a difference...
73, Stefan
Am 10.04.2016 22:30, schrieb [email protected]:
the carrier is on the air.
the message:
start 2016-04-11 07:00:00
coding 8K19A
CRC 16
period 30
length 3
duration 03:28:00:00
Have fun
Uwe/dj8wx
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