Hi Gary,
On 2/22/2023 10:28 AM, K9RX via wsjt-devel wrote:
I like to use ECHO to test the station on 6M EME.
But the latest version has changed enough I was wondering if there was a
short help file for it?
Better than a short help file: there's a full paper about Echo mode.
See item #34 here: https://wsjt.sourceforge.io/refs.html .
Also: The Echo graph will at times show the echo centered – and other
times show it offset. I have a jpg showing a recent echo run where the
echo was very strong – and it was showing it as the right numeric
doppler shift, 96 Hz, but it was showing it on the graph as -96Hz and
there was no SNR value reported (-99.0 shown). You can see the echo on
the wide graph – you can see the echo on the echo graph – but both have
it lower than it should be…
A few minutes earlier I had 2 echos at -14.6 and others in to the low
20’s – these were all showing on the spreadsheet – and “properly” on
both the wide and echo graphs.
Gary Myers
K9RX
Set up Echo mode as described in the paper referenced above. Be sure to
check Doppler tracking on the Astronomical Data window, and select "Own
Echo" for Doppler Tracking mode. Your echo should always be centered at
frequency offset 0. SNR values are accurate and reliable.
-- 73, Joe, K1JT
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