Re: LF: EbNaut LF message announcement

[DK7FC <selberdenken@posteo.de>]

Hi Luis,

File start: 20:55:54.360
Message start: 21:00:00.3
Decimated SR: 11.71926

Offset: 0.3 + 4/11.71926 + 5.64 + 4*60 = 246.281

73, Stefan

Am 12.12.2018 14:34, schrieb VIGILANT Luis Fernández:

Clearly not my day J

 

Start offset 305.64

List length 108608

16K21A CRC16 Symbol 1

Length 12

 

73 de Luis

EA5DOM

 

De: owner-rsgb_lf_group@blacksheep.org [mailto:owner-rsgb_lf_group@blacksheep.org] En nombre de DK7FC
Enviado el: miércoles, 12 de diciembre de 2018 14:19
Para: rsgb_lf_group@blacksheep.org
Asunto: Re: LF: EbNaut LF message announcement

 

Hi Luis,

Thanks for the wav file. I can decode the message without a problem!
What values did you choose for the parameters?

73, Stefan


Am 12.12.2018 13:56, schrieb VIGILANT Luis Fernández:

Hi Stefan, EbNaut

 

Attached is the file containing your last night transmission at 21 UTC

SR has the last sample rate, as corrected by the 1pps from GPS. The converter uses a 120KHz LO from GPS

So the soundcard center is at 17.540KHz for a zero frequency offset

 

73 de Luis

EA5DOM

 

De: owner-rsgb_lf_group@blacksheep.org [mailto:owner-rsgb_lf_group@blacksheep.org] En nombre de DK7FC
Enviado el: miércoles, 12 de diciembre de 2018 13:11
Para: rsgb_lf_group@blacksheep.org
Asunto: Re: LF: EbNaut LF message announcement

 

Hello Luis,

Nice help charts, they should help the newcomers.

Well, i just checked if i can decode my own message from the local LF RX PC. Each message decodes as expected.
Can you show me your decoder settings and send me a .wav file? Is the sr.txt file updated?

73, Stefan

Am 12.12.2018 12:54, schrieb VIGILANT Luis Fernández:

Hi EbNaut

 

Puzzling here trying to decode. Huge signal but no way to decode  L

Tried the 0.3s offset plus 4/Sample Rate but no way. Any other different offsets, even zero

 

BTW. This is my help chart to decode EbNaut https://www.dropbox.com/s/gdy7fqxtk8qukz3/EbNaut%20Decoder%20settings.bmp?dl=0

Complemented with, file export configuration in SpectrumLab https://www.dropbox.com/s/j9le8em2ac89sis/File%20Export%20configuration.bmp?dl=0

and SL file configuration for Markus EBnaut  tools https://www.dropbox.com/s/l4ty8yyi2yetaep/SR%20file%20configuration%20explained.bmp?dl=0

 

Decoding EbNaut is the hard side of the game

 

73 de Luis

EA5DOM

 

De: owner-rsgb_lf_group@blacksheep.org [mailto:owner-rsgb_lf_group@blacksheep.org] En nombre de DK7FC
Enviado el: miércoles, 12 de diciembre de 2018 12:28
Para: rsgb_lf_group@blacksheep.org
Asunto: Re: LF: EbNaut LF message announcement

 

Hi Jay,

Pity. Did you consider the 0.3 second offset?
73, Stefan

Am 12.12.2018 12:07, schrieb jrusgrove@comcast.net:

Stefan

 

Surprisingly, I had no copy of your LF EbNaut signal last night. 

 

Jay W1VD 

 

 

----- Original Message -----

From: Markus Vester <markusvester@aol.com>

Reply-To: <rsgb_lf_group@blacksheep.org>

To: <rsgb_lf_group@blacksheep.org>

Sent: 12/11/2018 4:07:53 PM

Subject: Re: LF: EbNaut LF message announcement

---

Hi Stefan,

a booming signal here, as usual. Interestingly, simultaneous decoding of VO1NA is pretty much undisturbed, even though ebnaut-rx claims -14.1 dB carrier-based  Eb/N0 due to the increased power in the 115 Hz audio passband.

Unfortunately at this time I can't run autodecoders with the heavier code, the available PC took many minutes on full throttle just to crunch through the flat-phase trials. 

73 and good luck,
Markus

-----Ursprüngliche Mitteilung-----
Von: DK7FC <selberdenken@posteo.de>
An: rsgb_lf_group <rsgb_lf_group@blacksheep.org>
Verschickt: Di, 11. Dez 2018 18:07
Betreff: LF: EbNaut LF message announcement

LF,

Another opportunity for the EbNaut friends:

f = 137.540 kHz
Start time: 11.DEC.2018  20:00 UTC (hourly, including 7 UTC)
Symbol period: 1 s
Characters: 12
CRC bits: 16
Coding 16K21A
Antenna current: 4 A
Duration: 28:48 [mm:ss]

73, Stefan