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Re: LF: RE: EbNaut on LF

To: [email protected]
Subject: Re: LF: RE: EbNaut on LF
From: DK7FC <[email protected]>
Date: Mon, 24 Apr 2017 16:29:20 +0200
In-reply-to: <579355A36AEE9D4FA555C45D556003AB8FDD246F@servigilant.vigilant.local>
References: <579355A36AEE9D4FA555C45D556003AB8FDD246F@servigilant.vigilant.local>
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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


De: [email protected] [mailto:[email protected]] En nombre de Domenico IZ7SLZ
Enviado el: lunes, 24 de abril de 2017 13:10
Para: [email protected]
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


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