Re: LF: EbNaut LF message announcement

[Markus Vester <markusvester@aol.com>]

> minor phase instability in your phase plot? Is it propagation?

Yes I think so, the polar plot also shows some amplitude variation. No idea though why there were 55 symbol errors, from the phase plot I would have expected very near zero.

73, Markus


-----Ursprüngliche Mitteilung-----
Von: DK7FC <selberdenken@posteo.de>
An: rsgb_lf_group <rsgb_lf_group@blacksheep.org>
Verschickt: Di, 11. Dez 2018 22:48
Betreff: Re: LF: EbNaut LF message announcement

Hello Markus and Geoff,

Markus, thanks for the decode and feedback. How do you explain the minor phase instability in your phase plot? Is it propagation?

Geoff, thanks for trying. The 2nd message is completed already. S/N should be fine for a decode :-)
Are you also new on this reflector? It is nice to see new OMs always and always again :-) I know your call from theWSPR map on LF. Your RX and location must be very good for LFreception!
Which method do you use for getting EbNaut decodes, i.e. what isyour (extended) rig?

73, Stefan

Am 11.12.2018 22:29, schrieb Geoff Hughes:

Stefan,

A good signal here also - however I have been unable so far to produce a recording which will produce a successful decode. I will keep attempting.

73 Geoff G0LUJ

---

From: owner-rsgb_lf_group@blacksheep.org <owner-rsgb_lf_group@blacksheep.org> on behalf of Markus Vester <markusvester@aol.com>
Sent: 11 December 2018 21:07
To: rsgb_lf_group@blacksheep.org
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