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Re: LF: PA0O log the lost QSO Autopsy

To: [email protected]
Subject: Re: LF: PA0O log the lost QSO Autopsy
From: Joe Taylor <[email protected]>
Date: Wed, 31 Oct 2012 15:05:15 -0400
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Hi Eddie,

Many thanks for sending me the files you recorded at 2114 2120 2128 2142 and 2150 UTC on October 30. They are much appreciated.

As far as I can see they decode just about as expected.  See

http://physics.princeton.edu/pulsar/K1JT/G3ZJO_files.png

for my results with yesterday's current version, WSJT-X v0.2 r2706, which I had assumed you were using.

Your Rx log file shows very different decoding results, including many garbage decodes. Perhaps you had not upgraded to r2706, after all ?

You have also posted some strange looking results produced when trying to receive your own transmitted signal. JT9 is a weak signal mode; while tweaking the performance of the decoder, no effort has been put into making it work on very strong signals. There are numerous ways to make laboratory-style tests -- Tx to Rx in your own shack -- but just receiving the signal with S/N >> 0 dB is not, in general, going to work.

        -- 73, Joe, K1JT


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