[CQ-Contest] CQWW - Excessive Bandwidth

[David Gilbert]

The thing is, none of that is needed.  It should be possible to write a 
software application that scans the entire SDR recording and quantifies 
the energy density in the frequency domain of a CW signal (it would be 
considerably more difficult for SSB) since the trash would still be time 
sync'd to the fundamental.  The sponsor could, for example, rule that 
XX% of the energy must fall within a 200 Hz window or be flagged for a 
"wide" signal.  No particular need for any participant to report anyone 
... just let the software do it.

I've suggested something like this off and on for the last couple of 
years and to be honest I'm surprised somebody hasn't tried to do it.  
Maybe it would be more difficult than I think ...

73,
Dave   AB7E




On 11/4/2013 7:06 AM, Paul O'Kane wrote:
>
> The CQWW sponsors are leading the way in defining and,
> hopefully, clamping down on unsportsmanlike conduct.
>
> They say " "Examples of unsportsmanlike conduct include.....
> 5. Signals with excessive bandwidth (e.g., splatter, clicks)"
>
> Anyone who uses SDR-based panadaptors, including the Elecraft
> P3, can recognise and measure wide signals instantly - by just
> looking at them.
>
> It seems to me that if we had an agreed method of reporting
> excessive bandwidth, contest sponsors could confirm it for
> themselves by checking their SDR recordings - using times
> and frequencies from our Cabrillo logs.
>
> The question arises, how would each of us indicate wide
> signals from other stations we work - not to mention the
> ones we might prefer not to work.
>
> The ones we work are easy.  My suggestion is to add /Q to
> the callsign logged.  I'm using Q, because it cannot be
> confused with another country's callsign - no calls begin
> with Q.  There may be implications for dupe-checking with
> some software, but nothing that can't be supported with a
> few extra lines of code.
>
> There are other options, but I would not consider varying
> the usual 59(9) reports because it would take longer.
>
> 73,
> Paul EI5DI
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