Sorry, I Thought I replied. Yes Phase Invert is unchecked in the setting of the Flex 5000a software.
O I did reply, it's above. I did check, it and had the same problem.
I even called MFJ The same the wires for the meter are wired backward. HAHAHAHA. Got the email They asked what band is it happening I said AM. they never answered me back gue it was that Crusty Ham mentality YOU're NOT SUPPOSED TO USE AM!
I, not going to Buy MFJ any more their support sucks.
Let me try this another way: CHECK THE BOX TO INVERT THE PHASE.
Let us know what happens.