That message says the K2 is not producing sufficient power to complete
the TUNE.
Do you have power out of the K2? Set the ATU menu to CALP and connect a
dummy load.
If the K2 power is set at the extreme low power settings, that may not
be enough to do a TUNE. Turn the power upto 2 watts or
My AT has suddenly started showing LO PO after displaying the SWR on all
bands when the TUNE button is pressed. I have the AT set to AUTO and even
when manually increasing the power I still get the LO PO display after the
K2 displays the SWR. Changing antennas has no effect. Ths is K2 serial
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