Re: VLF: EbNaut tonite

[Jacek Lipkowski <sq5bpf@lipkowski.org>]

I've tried the decoded message in ebnaut signal analysis mode, the decoder 
returns:
initial reference phase 45.0 amplitude 2.401e-03
carrier phase: 45.4
carrier Eb/N0: -7.1
carrier S/N: 22.50 dB in 12.6 uHz

so around 6-7dB, and it would be receivable here too. PSE QRO!

VY 73

Jacek / SQ5BPF


On Thu, 25 May 2017, Paul Nicholson wrote:

> Date: Thu, 25 May 2017 19:50:31 +0000
> From: Paul Nicholson <vlf0403@abelian.org>
> Reply-To: rsgb_lf_group@blacksheep.org
> To: rsgb_lf_group@blacksheep.org
> Subject: Re: VLF: EbNaut tonite
>
>
> Stefan wrote:
>
> > 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
> Copied
>
> "THIS IS THE FIRST SMS SENT OVER VLF BY RADIO AMATEURS.
>  THANKS TO PAUL NICHOLSON, DL4YHF AND DF6NM FOR SOFTWARE
>  DEVELOPMENTS.  JOIN IN THE EXPERIMENTS! 73, DK7FC"
>
> Rank 0, constant reference phase;
> Eb/N0 = +0.6 dB;
> BER 27.3%;
> carrier S/N: 30.17 dB in 12.6 uHz,
>            -18.81 dB in 1Hz,
>            -52.79 dB in 2.5kHz;
>
> That's a new record message length for VLF.
>
> --
> Paul Nicholson
> --