Re: [IRCA] KXTO QRSS Sample File

["Paul B. Walker, Jr." <walkerbroadcasting@xxxxxxxxx>]

Go back in the list, al lthe details were only published here a day or two
ago

paul



On 6/5/07, Chris Black <n1cp@xxxxxxxxxxx> wrote:
>
>
>
> Guess I must have missed something. I am assuming that KXTO is a radio
> station and there will be a test with CW transmission? When will this test
> be and what frequency/time, etc.
>
> Chris Black,
> Cape Cod
> ----- Original Message -----
> From: "Les Rayburn" <les@xxxxxxxxxxxxxxxx>
> To: <ABDX@xxxxxxxxxxxxxxx>; <mwc@xxxxxxxxxxx>; "Mailing list for the
> International Radio Club of America" <irca@xxxxxxxxxxxxxxxx>;
> <amdx@xxxxxxxxxx>; <wghauser@xxxxxxxxx>; <lynnhollerman@xxxxxxxxx>;
> "Discussion of AM, FM, and TV DX" <amfmtvdx@xxxxxxxxxxxxxxx>;
> <am@xxxxxxxxxxx>
> Sent: Tuesday, June 05, 2007 4:50 PM
> Subject: [IRCA] KXTO QRSS Sample File
>
>
> >
> >
> > For those who wish to experiment with receiving QRSS (slow speed Morse
> > Code)
> > transmissions prior to the KXTO Test, Brandon Jordan who runs the very
> > informative www.dxtests.info web site has posted a sample file that will
> > closely match the actual file for the test. It's available at:
> >
> > http://www.dxtests.info/_files/KXTO 10 Minute File.wav
> >
> > You can download a free Spectrum Analyzer called "Argo" at:
> >
> > www.weaksignals.com
> >
> > Keep in mind, that what you're really looking at is a audio frequency
> > spectrum analyzer, not RF. You're feeding an audio signal from your
> radio
> > (headphone jack, or other output) into one of the inputs on your
> computer
> > soundcard (MIc, Line, etc.) and then viewing what that audio looks like.
> >
> > Using this technique it's possible to detect slow speed Morse Code
> signals
> > well below the noise, sometimes as much as -20db! Using this technique,
> > world wide reception of the KXTO DX test may be possible.
> >
> > In advance of the test, I'd concentrate on looking at the carrier
> signals
> > of
> > various AM stations using USB, LSB, and CW modes. Adjust levels on the
> > receiver output, soundcard input, etc. until you get nice, clean images
> > that
> > are free of distortion. It's easy to overdrive the soundcard with too
> > "hot"
> > of a signal.
> >
> > The actual transmission will be at 2.5khz and you should be able to
> > literally "read" the dots and dashs of the
> > QRSS transmission spelling out, K-X-T-O.
> >
> > In Morse that looks like-
> >
> > K= Dash Dot Dash
> > X= Dash Dot Dot Dash
> > T= Dash
> > O= Dash Dash Dash
> >
> > It's a great mode, and potentially a nighttime IBOC-Beater! You can
> learn
> > lots more at:
> >
> > http://www.w0ch.net/qrss/qrss.htm
> >
> > http://www.ussc.com/~turner/qrss1.html
> >
> >
> >
> > 73,
> >
> > Les Rayburn, N1LF
> >
> >
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> >
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> >
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> >
>
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>


-- 
Paul B. Walker, Jr.
www.walkerbroadcasting.com
walkerbroadcasting@xxxxxxxxx
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