Re: LF: MF: EbNaut

[Markus Vester <markusvester@aol.com>]

Hi Paul,

 

I'm currently grabbing 477686 to 477704 Hz, and  I think that IZ7SLZ was using similar settings. Going to 477690 Hz would put you inside the decimated passband and still stay clear of the others.

If the signal is weak more carrier would be better to provide an estimate for SNR. Sending EbNaut every 20 min with ~ 12 minutes of carrier would seem ideal for the purpose.

 

73 and good luck!

Markus

 

-----Ursprüngliche Mitteilung----- 
Von: Paul Nicholson <vlf0403@abelian.org>
An: rsgb_lf_group <rsgb_lf_group@blacksheep.org>
Verschickt: Fr, 26 Feb 2016 6:35 pm
Betreff: Re: LF: MF: EbNaut

 

I'm thinking of playing a bit more with the tx 

on MF, after a rebuild of the PA. 

 

Now has a bit more power.   Maybe enough to reach 

Italy? 

 

Wondering what frequency is best to use, I don't 

want to clobber Joe on 477.7 or Riccardo on 477.695, 

maybe I should use 477.720.  I want to try 0.5 

second symbols so will need a bit more bandwidth. 

 

Suggesting 

 

  Freq: 477720.00000 Hz 

  Chars: 15 

  Symbols: 0.5 seconds 

  Code: 8K19A 

  Duration: 496 seconds, 00:08:16 

  Repeat: Every 10 minutes. 

 

Is that enough carrier in between? 

 

-- 

Paul Nicholson 

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