n2mdk said:
Only by locking out the PTT.
That would be the easy way :lol:
But really, you could also likely do it on an as-channel basis by changing the offset per channel. It's also helpful for those borderline wackers who have to mod every radio they get, say you wanted to RX 155.280 without TXing (with a modded radio) then you could set the TX offset to something like -30mhz so it would be trying to TX 125.280 where it has no ability to TX.