waterfall blank, returns after switching bands

[jsdroyster]

Has anyone had the occasional experience that the panadapter waterfall is
blank when you turn on the K3, then it returns if you switch bands?  Once it
returns on a different ban, then it will be there on the original band when
I switch back.  I have seen this twice, and I don't know what to make of it.
THANKS!!
Julie KT4JR


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[gm3sek]

73 from Ian GM3SEK


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[gm3sek]

This should be all.

73 from Ian GM3SEK


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