Re: LF: Re: EbNaut test transmission

[Domenico IZ7SLZ <iz7slz.domenico@gmail.com>]

Good evening all,

no success on decoding Andy's  Ebnaut transmissions of last night here in JN80NU. I'm sorry.

In the waterfall i can see traces of G4JNT (and also VO1NA) but unfortunatly no decode happens running EbNaut for that periods of time  (even with LIST=20000).

But if i run for periods when only carrier is present, i found the Andy's signal exactly centered,  confirming that, at list, frequency offsets are OK. My receiver sensitivity and rx-antenna need improvement.

Hope to be more lucky on next Andy's transmissions.

I also ran EbNaut on  VO1NA signal and I got again "*" on his carrier,  confirming, once again, the good  frequency stability.

Thanks to Andy for the document regarding his coherent receiver project.

If Andy wants to test it, some EbNaut transmissions from me in the late evening and during the night are possible. I'm checking the setup. If everything is ok, i will confirm the schedule with a further email to the Group.

73, Domenico / iz7slz

On 18 November 2015 at 15:26, Paul Nicholson <vlf0403@abelian.org> wrote:

Nice chart.   I'm glad to see that you're getting some
decodes down below zero Eb/N0, that's more like a proper test!

Are you running with list size 200?  There's about another dB
of coding again available if you increase to 20000.  Maybe
that will fill in some of the gaps.

Mostly these signals are too strong. If you can see EbNaut on
a spectrogram, you don't need to be using it.

--
Paul Nicholson
--

capture 11_18_15.jpg
Description: JPEG image

EbNaut with VO1NA signal.png
Description: PNG image

G4JNT carrier.png
Description: PNG image