Pointblank
Senior Member
I think the key for activation is very frequency dependent. Specific frequency +sequence will make each case unique , won't causing false triggering.
You can't just slap a radar onto an aircraft and fly it... it requires major testing, systems checks and debugging in order to get any new electronics to work on an aircraft. Interference from a variety of sources both known and unknown can cause a lot of headaches as they could interfere with other systems, including weapons. Furthermore, there needs to be testing in a variety of environments to ensure that all systems work as functioned.
I present you with case one of avionics modernization, where a complete suite of avionics on a well understood aircraft was heavily upgraded: