Hello Paul, VLF,
An excellent result! Couldn't be better. BTW i confirm the message :-)
So now we managed to transfer a 100 character message on 8270 Hz and
6470 Hz, by stacking just 2 daily transmissions.
The duration of the transmission on 6470 Hz was even shorter, and the
ERP was 2.1 dB lower but the Eb/N0 was higher :-)
On 5170 Hz the ERP will be another 2 dB lower. With 300 mA it will be
the strongest signal that i radiated from this antenna on this
frequency, 2.5 dB stronger than last year. So far we managed 20
characters in 3 days. So maybe 100 characters can be done in 7 days.
It's getting harder!
The experiments on 6470 Hz will still take some time, so no problem that
your E field is not available at present.
73, Stefan
Am 08.10.2017 20:57, schrieb Paul Nicholson:
Stefan wrote:
> f = 6470.1000 Hz
> Start time: 07.October.2017 06:00:05 UTC (daily)
> Symbol period: 7 s
> Characters: 100
> CRC bits: 8
> Coding 8K21A
Copied
"HEY PAUL, THAT WORKED WELL AGAIN! LET US TRY 5170 HZ SOON.
GOOD LUCK. 73 FROM HEIDELBERG DE DK7FC..."
Eb/N0 = -0.4 dB, BER 31.1%, phase -109.0, constant reference.
Each day:
7th: Eb/N0 = -3.6 dB phase -106.9
8th: Eb/N0 = -3.2 dB phase -110.9
Received with combined H-field and E-field. From tomorrow,
E-field will not be usable.
--
Paul Nicholson
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