Hi,

(using 1.7.0.r6870, but has been seen on previous recent builds)

Windows 10 Pro, up-to-date, Soundblaster Live! USB soundcard, WSJT-X set 
to JT65 mode (VHF features disabled, everything pretty much default).

Occasionally, but more frequently than rarely, I'm seeing a very strange 
display in the wide graph, which appears to be full of artefacts, for 
the whole rx period - perhaps multiple copies of real signals repeated 
across the spectrum? Even the "silent part", i.e. from second 50 to 59 
of the tx period, looks different. It only happens after a TX period, 
and the subsequent TX period is usually (not always) followed by a 
normal display again. I'm certain this is *not* a consequence of 
receiving someone's overdriven signal. Decoding appears normal, although 
it's difficult to be sure because it's impossible to tell how many real 
signals there are during that period.

Before I delve deeper, is this a known problem that someone is already 
looking at?

Regards, Mark


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