Radio Communications (RCOM) Practice Test

On the EUFD, the star symbol denotes what status?

Power is cycling Frequency is locked Squelch is on Transmission paused

Correct Answer:

Squelch is on

Explanation:

The star indicates that squelch is on. Squelch acts as a gate for the audio output: when it’s enabled, the receiver mades audio only if a signal strong enough to meet the squelch threshold is present, muting the background noise otherwise. Seeing the star on the EUFD shows that this noise-suppressing function is currently active, so weak or no-signal conditions won’t produce idle hiss. If you wanted to hear everything including noise, you’d turn squelch off and the star would not indicate an active status.

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