Re: VLF: EbNaut tonite

[Markus Vester <markusvester@aol.com>]

Good! The DL0AO grabber has just come back online again. The current buildup of easterly QRN is brightening the separate "6000" E- and H-field spectrograms, but seems to be well suppressed on the synthetic cardioid:

http://df6nm.bplaced.net/dl0ao/VLFgrabber/vlfgrabber_dl0ao_test.htm

Let's hope that QRN sources will stay restricted to Eastern Europe. I will need to stitch together three data files for the long message.  

Best 73,
Markus


-----Ursprüngliche Mitteilung-----
Von: DK7FC <selberdenken@posteo.de>
An: rsgb_lf_group <rsgb_lf_group@blacksheep.org>
Verschickt: Mi, 24. Mai 2017 12:49
Betreff: Re: VLF: EbNaut tonite

Hi Paul and Markus,

Great results! Thanks for the reception and decode.

Well, let's try something for the record list again:

f = 8270.100000 Hz
Start time: 24.May.2017   20:00:00 UTC
Symbol period: 10 s
Characters: 160 ( 1 SMS length :-) )
CRC bits: 10
Coding 8K21A
Duration: 22h
Antenna current: 700 mA

It is a challenge for the DL0AO cardioidal antenna looking towards the west :-)

73, Stefan



Am 24.05.2017 06:19, schrieb Paul Nicholson:

A couple of easy decodes of the very strong signal
from Stefan.

Stefan wrote:

> f = 8270.100000 Hz
> Start time: 22.May.2017   20:00:00 UTC
> Symbol period: 20 s
> Characters: 12
> CRC bits: 3
> Coding 16K21A

Eb/N0 8.5 dB.
BER 18.6 %.
constant reference phase.
carrier S/N 26.86 dB in 32.9 uHz,
           -17.97 dB in 1Hz,
           -51.95 dB in 2.5kHz.

> f = 8270.100000 Hz
> Start time: 23.May.2017   18:00:00 UTC
> Symbol period: 40 s
> Characters: 4
> CRC bits: 3
> Coding 16K21A

Eb/N0 12.6 dB.
BER 16.0%.
constant reference phase.
carrier S/N: 26.16 dB in 33.2 uHz,
            -18.63 dB in 1Hz,
            -52.61 dB in 2.5kHz.

--
Paul Nicholson
--