Topband
[Top] [All Lists]

Re: Topband: FT8 - How it really works

To: topband@contesting.com
Subject: Re: Topband: FT8 - How it really works
From: Martin <dm4im@t-online.de>
Date: Thu, 20 Dec 2018 20:45:20 +0100
List-post: <mailto:topband@contesting.com>
Correct me if im wrong:
A K3 owner could easily check this.
You need 2 computers, running WSJT on both. Don't know if you can run 2 instances of WSJT on a single computer. Feed the left channel from LINE OUT (=mainRX) to one instance of FT-8 and the right channel (=sub-RX) to the other instance. Crank down the bandwith to 1khz or less on main RX and leave the bandwith on sub RX 2.7khz or wider. While your computers do the decoding, you can hear the 2 RXes in your headphone (or not).

> In a condition of only one weak signal on the band, I haven't run a
> test
> that says whether FT8 decodes better than CW or not.  NN4T said that
> using FT8 on 6 meter sporadic E that he observes signals being decoded
> with no audio in the receiver.  That is probably with a wide
> bandwidth,
> and it would be interesting to know if the signals would be audible
> with
> a narrow bandwidth.

--

Ohne CW ist es nur CB..

73, Martin DM4iM
_________________
Searchable Archives: http://www.contesting.com/_topband - Topband Reflector

<Prev in Thread] Current Thread [Next in Thread>