RE: LF: RE: EbNaut on LF

[VIGILANT Luis Fernández <luis@vigilant.es>]

Thank you Stefan. Noted !

 

I was getting puzzled with this and blaming VAC :-)

 

73 de Luis

EA5DOM

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De: owner-rsgb_lf_group@blacksheep.org [mailto:owner-rsgb_lf_group@blacksheep.org] En nombre de DK7FC
Enviado el: lunes, 24 de abril de 2017 16:29
Para: rsgb_lf_group@blacksheep.org
Asunto: Re: LF: RE: EbNaut on LF

Hi Luis,

It is normal that you see a few carriers of the Alpha signal because it is a pulsed/keyed signal. This can be confusing in the first step. Just increase the resolution more, then the other lines will disappear :-) (They will not fit in the spectrogram any more then...).
The center line is at 1904.7619 Hz. 424 uHz is a good bandwidth for observations, for example.

73, Stefan

Am 24.04.2017 16:20, schrieb VIGILANT Luis Fernández:

Thank you very much for the test Domenico !

 

I have been playing with Markus EbNaut utilities for SpectrumLab this weekend and just needed a signal in LF :-)

 

Anyway I'm not very confident to get decodes. Using virtual audio cable to feed SL the sample rate is 44100Hz

but when I zoom at mHz FFT-bin of a steady carrier like Alphas for example, I see a group of carriers, not

a single signal. I suspect VAC samplerate is not exactly 44100 or there is other kind of problem with this software

 

This don`t affect WSPR or Opera decodes, but may be EbNaut will not admit it. Let's try it

 

73 de Luis

EA5DOM

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De: owner-rsgb_lf_group@blacksheep.org [mailto:owner-rsgb_lf_group@blacksheep.org] En nombre de Domenico IZ7SLZ
Enviado el: lunes, 24 de abril de 2017 13:10
Para: rsgb_lf_group@blacksheep.org
Asunto: LF: EbNaut on LF

QRG 137495.000 Hz

At XX.00 and XX.30

18 characters

0.5 s/sym

8K19A CRC16

Duration 9 min 28 s

Until 22.00 UT of today.

Reports are welcome.

73, Domenico iz7slz