Re: LF: EbNaut tests 137.490 kHz

[Markus Vester <markusvester@aol.com>]

Hi Joe,

thanks again for the positive report!

Yes that SpecLab configuration from
 http://df6nm.bplaced.net/VLF/fec_tests/df6nm_ebnaut_utilities.zip
should basically work for EbNaut. This zip also contains an email text file explaining some details of the procedure. 

In case your RX is not stable on a sub-mHz level, you may want to lock to your pilot tone by engaging SpecLabs "Frequency Offset Detector" (not the "Samplerate Detector") on 1500 Hz audio. I would recommend to look into SpecLab's help for a functional description and setup details.    

Good luck!

Markus (DF6NM)

-----Ursprüngliche Mitteilung-----
Von: jcraig <jcraig@mun.ca>
An: rsgb_lf_group <rsgb_lf_group@blacksheep.org>
Verschickt: Fr, 9 Dez 2016 9:06 pm
Betreff: Re: LF: EbNaut tests 137.490 kHz

Hi Markus,

Your signal was readable (without too much imagination) this morning.
Will try for your ebnaut tonight with the DOCXO pilot on 137.500 kHz.
If opds32_150924.usr is used with Spec Lab, this should yield the txt
files to feed to ebnaut?

Cheers
Joe VO1NA

On Fri, 9 Dec 2016, Markus Vester wrote:

> This evening I'll run some LF EbNaut tests again:
>
> Frequency 137490 Hz,
> 8 characters, 8K19A,
> 1 second symbols (duration 656 seconds)
> start times: 19:30, 20:00, etc, plus 0.3 s transmit delay
>
> Best 73,
> Markus (DF6NM)