I'm sure it is answered somewhere on this forum, but I can't find it.
What avionics should have the antennas connected before power on to reduce the chance of burning them up?
Thank,
Nick
Guess you better keep looking, hint: the S stands for squitter.Are you sure?
I cannot find anything online to suggest that Mode-S transponders transmit without receiving an interrogation (hence keeping the "spond" in "transponder").
No antenna connected means it's highly unlikely that the device will successfully detect an interrogation from SSR/TCAS sources and presumably therefore will not transmit without a load (antenna) attached.
Admittedly a gamble, but it seems the odds are in your favor.
Educate me if I'm wrong.
ps - not trying to be picky Walt, the S actually stands for "Select"