Re: LF: RE: EbNaut on LF

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

Hello Luis and all,

glad that my transmissions could be useful for your actual tests. Hope to get a report from you.

Just for information, i'm using the Paul's program "EbSynth"  to generate the BPSK signal using a reference signal of 10kHz from the GPS .

The program EbSynth works very well, it has as scheduler and a useful PTT function for activate my transmitter and carrier some seconds before and after the BPSK.

All transmissions are gone correctly since now. Just the one at 11.30  was delayed at 11:35.

GL es 73, Domenico IZ7SLZ

On 24 April 2017 at 17:08, VIGILANT Luis Fernández <luis@vigilant.es> wrote:

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

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