Re: LF: EbNaut LF message announcement

[DK7FC <selberdenken@posteo.de>]

Thanks again Luis.

One more thing: Your sr.txt file contains the frequency which you set to 17540 Hz. But it would be better also to add the LO frequency, i.e. just write 137540 in that file. Then, the frequency reading in the EbNaut decoder and the captures will look right. Otherwise someone may think i was TXing on 17540 Hz, which would be strictly forbidden!!!!! ;-)

73, Stefan

Am 13.12.2018 16:39, schrieb VIGILANT Luis Fernández:

Hi Stefan

 

Your second transmission at 00:30 UTC was still stronger

 

Signal decreasing after that and last transmission at 06:30 was just 4.5dB Eb/N0

 

 

It is very nice to see the 8 transmission in the slow spectrogram

 

 

 

 

De: owner-rsgb_lf_group@blacksheep.org [mailto:owner-rsgb_lf_group@blacksheep.org] En nombre de DK7FC
Enviado el: jueves, 13 de diciembre de 2018 15:58
Para: rsgb_lf_group@blacksheep.org
Asunto: Re: LF: EbNaut LF message announcement

 

Thanks Luis.

A nice SNR! You will manage the 50 characters as well i bet. Even 200 chars would be no problem.
But for me, using SpecLab to key EbNaut, it is not possible to use shorter symbol length than 1 second. Also i remember i have a PTT watchdog which interrupts the transmission after a duration of something between 30 and 60 minutes. So maybe it will clip a few minutes at the end of the coming message, we will see ;-)

73, Stefan

Am 13.12.2018 15:48, schrieb VIGILANT Luis Fernández:

Hi EbNaut

 

Fortunately same maths as yesterday ;-)

 

 

73 de Luis

EA5DOM

 

De: owner-rsgb_lf_group@blacksheep.org [mailto:owner-rsgb_lf_group@blacksheep.org] En nombre de DK7FC
Enviado el: jueves, 13 de diciembre de 2018 0:08
Para: rsgb_lf_group@blacksheep.org
Asunto: Re: LF: EbNaut LF message announcement

 

LF,

Another, shorter message, for the distant stations:

f = 137.540 kHz
Start time: 12.DEC.2018  23:30:00.3 UTC (8 repeats)
Symbol period: 3 s
Characters: 5
CRC bits: 16
Coding 8K19A
Antenna current: 4 A
Duration: 25:36 [mm:ss]

73, Stefan