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

[DK7FC <selberdenken@posteo.de>]

Yes, RR. The new error map is more informative. The errors are quite 
equally spread i find. Starting at 7 UTC looks more promising but let's 
try 6 UTC now.
73, Stefan

Am 02.11.2016 22:01, schrieb Paul Nicholson:
> I added the relative background noise at 6470 Hz to
> the error map,
>
>  http://abelian.org/vlf/tmp/161102b.gif
>
> Tried some further settings of blanker but no
> improvement over the +1.7 dB.
>
> > Start time: 03.11.2016   06:00:00 UTC
> > Symbol length: 30 s
> > Characters: 11
>
> Should have a good chance if we have another quiet
> day.  I think that 15 chars with 25 second symbols
> is probably within reach (at about -0.4 dB) but
> let's try 11 chars first.
>
> The error map is useful for planning transmissions.
> Even though the signal is too weak to plot its
> amplitude, the error map reveals when the signal
> is strong enough.
>
> --
> Paul Nicholson
> --