Re: LF: Ebnaut 477.7 kHz

[Markus Vester <markusvester@aol.com>]

Got some pieces of carrier in the spectrogram, up to about 10 dB SNR in 1 mHz. Considering the carrier duty cycle (8.5 out of 15 minutes), that would have been about +15 dB in a mHz for a pure carrier, or -15 dB EbN0 at 1.1 bit/s net data rate - no chance for a decode here.

 

Best 73,

Markus  (DF6NM)

 

-----Ursprüngliche Mitteilung-----
Von: Markus Vester <markusvester@aol.com>
An: rsgb_lf_group <rsgb_lf_group@blacksheep.org>
Verschickt: So, 31 Jan 2016 10:43 pm
Betreff: Re: LF: Ebnaut 477.7 kHz

Hi Joe,

 

even though the noise is less than ideal here, I'll will be watching and saving data for possible decodes. There's an updating spectrogram https://dl.dropboxusercontent.com/u/26404526/opds8.png on the opds page - if you leave the carrier on between EbNaut rounds, it might become visible and assist in checking the decoder frequency offset.

 

Good luck,

 

Markus (DF6NM)

 

-----Ursprüngliche Mitteilung-----
Von: jcraig <jcraig@mun.ca>
An: rsgb_lf_group <rsgb_lf_group@blacksheep.org>
Verschickt: So, 31 Jan 2016 9:04 pm
Betreff: LF: Ebnaut 477.7 kHz

Hi Domenico,

All set up for 2200 utc tonight and at 15 min intervals thereafter.
75 chars K19A 1936 symbols 387.2 seconds 10 watts continuous carrier
unless the FET fries!

The same DOCXO ref osc will be used, but there may be a (small) rounding
error in the frequency.

Good Luck 73
Joe VO1NA

On Fri, 29 Jan 2016, iz7slz.domenico wrote:

> Hello Joe, group

I don't known if you are using same stable exciter that you have used in your
recent LF EbNaut test. 
If so, i invite you to try  some  EbNaut transmissions on MF in the next days. 
In good condx i often copy some traces of your MF signal here in JN80, so it
will be an interesting experiment try to decode some 
T/A messages from you.


Thanks in advance.

73, Domenico IZ7SLZ



Sent from Samsung Mobile

-------- Original message --------
From: jcraig@mun.ca
Date:29/01/2016 12:16 AM (GMT+01:00)
To: rsgb_lf_group@blacksheep.org
Subject: LF: QRSS3 477.7 kHz

In case anyone is interested...

Reports welcomed.

73
Joe VO1NA