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Re: [CQ-Contest] What my ears can not hear does not matter

To: <cq-contest@contesting.com>
Subject: Re: [CQ-Contest] What my ears can not hear does not matter
From: "Marijan Miletic, S56A" <s56a@bit.si>
Date: Tue, 11 Jun 2013 09:29:38 +0200
List-post: <cq-contest@contesting.com">mailto:cq-contest@contesting.com>
I wonder if Charly, HS0ZCW ever tried PSK on HF?  These are often inaudible
signals barely visible on waterfall with perfect error-free print!  WSJT EME
is even better case.  Beware of human limitations.  Pilots are trained to
fly by instruments!
 
Absolute limitations on SDR is ADC overflow level which is around 1 mW.
Your contest kW kill them unless good frontend bandpass filters are used.
Fortunately lot of signals are amplitude modulated.

 

LP MMM S56A

 

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