That's perfect Paul! Thanks for the decode. The error map is astonishing
clean!
So 200s symbols to 30s symbols that's 8 dB and without the 6 dB QRP,
here we are: 14 dB :-)
Still some things to prepare for next tests. Need to finish the usage of
'Oskar' now, because it wil be much easier to add the remaining 2
yoghurt cups on the coil to get more L.
I thought about the old times and the 46 km band. Not only i have been
on 6.47 kHz these days, if i remember correctly it was DF6NM and OE5ODL
as well. I would like to come back to that band for some tests. Maybe we
can see a first tendency of advantages / disadvantages.
73, Stefan
Am 03.05.2016 07:34, schrieb Paul Nicholson:
Stefan wrote:
> 130 mA
> f = 8270.1 Hz
> Start time: 01.05.2016 15:00:02 UTC
> Period: 200 s
> Length: 5
> CRC 16
> Coding 8K19A
Copied 'VLFDX'
Reference phase: constant
Eb/N0: +5.4 dB
BER: 26.8 %
Carrier: S/N: 19.77 dB in 9.8 uHz
Error map: http://abelian.org/vlf/tmp/160502a.gif
I am seeing the expected 6dB signal reduction
at the lower antenna current.
--
Paul Nicholson
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