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Re: LF: QRSS3 "challenge"

To: <[email protected]>
Subject: Re: LF: QRSS3 "challenge"
From: "Graham" <[email protected]>
Date: Thu, 2 Feb 2012 17:36:13 -0000
Importance: Normal
In-reply-to: <[email protected]>
References: <[email protected]>
Reply-to: [email protected]
Sender: [email protected]
Ah.. missing  is the  qsb  , to  remove  sections of the  plot  so  these  must  be  ground wave  tests :- )

Sent: Thursday, February 02, 2012 5:17 PM
Subject: LF: QRSS3 "challenge"

Dear all,


as mentioned some days ago I generated a whole series of Opera, WSPR and QRSS3 audio with a known SNR.

For Opera and WSPR it was easy to determine the lowest SNR for a proper decode. But for QRSS3 it is much more difficult as it depends on the operators "sharp eye". It must be somewhere in the range of -24 to -28dB SNR (@ 2.5kHz BW).

Today I did put all the QRSS3 screenshots in this range in a website, where you can fill in what you see (decode) for each screenshot.

I would like to invite all of you to give it a try and send me the results (the more entries the better the statistics).

After some time (Feb 10th) will put all results into some nice tables and graphs and make them available.

Of course no personal (individual) results will be published. But based on the results every participant (who keeps his results) can see where he ends.


The "QRSS3 Challenge" can be found at


73, Rik  ON7YD - OR7T

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