1e IFF Mode 4 & 5 Tie In

Question 1

Depends on AUDIO-OUT-LIGHT switch position. Reply light will come on when mode 4/5 replies are transmitted

Answer 1

Interphone system

Question 2

What is this function called that requires 3 inputs to function

Answer 2

HOLD function

Question 3

The HOLD function requires 3 inputs to function, what are they?

Answer 3

Control panel set to HOLD
Landing gear in down and locked position
Aircraft power retained for 15 seconds

Question 4

There are 2 Systems used exclusively for Mode 5 ECU’s 

Answer 4

UHF TOD

Mission Data

Question 5

The mission data uses these 3 things-

Answer 5

Platform ID #
National origin (NO) Code
Mission Code