Hi Greg,
The short answer is I have tried multiple cables and multiple computers.? The only common thing is the anti-virus and malware software on them.? That is why I plan to try disabling the protection software to see if it solves the issue.
I have tried changing bands, even power cycling the QDX.? Something is causing an issue that it takes a couple of resets to make work again.
BTW, I let the QDX connected to the Raspberry Pi 4 run all night, and it is still decoding on the active bands.
73
Evan
AC9TU