Re: VLF: EbNaut transmissions on lower frequencies?, pre-tests: 6.47kHz

[DK7FC <selberdenken@posteo.de>]

Hello Paul,

Good work indeed! The message is correct. It is the first digi mode 
message on 6.47 kHz.
-0.3 dB Eb/N0, that's quite critical, and that for 100 second symbols. 
Also the phase variations seem to be much higher than on 8.27. The 
question is, is this reproducable and/or is it related to our path only.
Maybe, going 200 Hz up or down would show a significantly different 
behaviour?!
We will see...

73, Stefan

Am 07.05.2016 09:24, schrieb Paul Nicholson:
> Stefan wrote:
>
> > A second EbNaut message will start:
> >
> > f = 6470.000 Hz
> > Start time: 05.05.2016   15:00:02 UTC
> > Period: 100 s
> > Length: 5
>
> I'm getting '73+55' at Eb/N0 = -0.3dB with
> phase pattern 30   60   30   60
>
> Carrier S/N: 15.25 dB in 19.5 uHz
>
> Still working on the first message, noise in the E/W loop
> was very high that night.
>
> Looks like we have between 40 and 65 degree day/night phase
> shift (depends which antenna I measure it on).
>
> --
> Paul Nicholson
> --