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Re: LF: SL settings for EbNaut FFT recording ?

To: [email protected]
Subject: Re: LF: SL settings for EbNaut FFT recording ?
From: Markus Vester <[email protected]>
Date: Wed, 3 May 2017 16:21:30 -0400
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In-reply-to: <[email protected]cal>
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Hi Luis,

yes I also found that your file starts 20.76 seconds late. But this is not a big problem, because the decoder can cope with missing data at the beginning or end. For a late start you should simply enter a negative start offset, i.e. -20.76 seconds plus four samples = -20.76 + 4 / 0.514 = -13 seconds. In this case the loss is less than a single sample so perfectly negligible. I also attempted to decode your file with no success, so probably just not enough SNR yet.

Best 73,

-----Ursprüngliche Mitteilung-----
Von: VIGILANT Luis Fernández <[email protected]>
An: rsgb_lf_group <[email protected]>
Verschickt: Mi, 3. Mai 2017 22:05
Betreff: Re: LF: SL settings for EbNaut FFT recording ?

Hi Markus

Not your fault ! I did not use your .USR directly. Tried to reproduce the configuration manually
Then I did not realize about the different time pattern in the files. Now I understand one more detail ;-)

Unfortunately EbNaut reports that the file start is at 18:00:20.760
So it seems it started too late. And the previous file will be one hour earlier, so loosing the end of the transmission
Would it worth to use a bigger FFT of 10 hours for example ?

Anyway show_rawsyms3b produces a very flat graphic. No signs of a signal anywere 
I think that means "keep playing" ;-)

73 de Luis

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