I'm using the AG 8x2 Plus with a Flex/PGXL/TGXL (so2r) for some time now.
1) What is a recommended setup in the 'AG for Windows' application to ground the antennas when the radio is not being used, without shutting down the Flex or SmartSDR?
2) Can you confirm that when SmartSDR is shut down all of the antennas are automatically grounded?
I just did some testing to make sure I am not guessing.
If you turn off SSDR, AG will go back to "None" band
If you don't have any antennas set as "None" band the AG will disconnect the antennas and all antennas will be grounded.
All unselected ports are automatically grounded on the hardware level.
At the time being there is no option to ground the antennas while SSDR is active other than maybe selecting a band on the SSDR that's not defined on the AG?