Radio Transmission in Trigger Zones - Altitude?

Currently if you put a radio transmission in a trigger zone, the transmission seems to originate on the ground. This can cause line of sight problems if you want to simulate a transmission from an airborne asset (AWACS, perhaps). Is there a way in the Radio transmission dialog in the Mission Editor that we can specify an altitude in which the transmission takes place?

(I know we can make an aircraft do a radio transmission via a switched condition, but this is very cumbersome and time consuming to do, not to mention sometimes you'll have to place an AI aircraft in an area you don't want it to be)

The scripting function allows you to set it in 3d space, probably just a simplification on the editor side that it doesn't have altitude as an option. https://wiki.hoggitworld.com/view/DCS_func_radioTransmission