When a short burst of noise is heard from any one of the four radios, that corresponding LED will firstly flash green.
If the noise continues for ½ sec longer the LED will change to RED.
Short Burst (crackle) = LED Flashing Green Detected Noise but no intelligence
Voice = Red (timed) Detected Noise and has Intelligence
No Noise Detected
LED Operation
Radio Indicator MKII

Radio Indentification System

Identify...Locate...Respond!
LED Operation