December 10, 2013

FCC Technician Exam Question Of The Day (T2B03)

Q) Which of the following describes the muting of receiver audio controlled solely by the presence or absence of an RF signal?

A) Carrier squelch

NJ2X Notes:
A carrier squelch opens the radio's audio based on the presence of sufficiently strong signal.  A radio equipped with carrier squelch automatically mutes the radio's audio when there is an absence of a signal with sufficient strength.  Most amateur radios are equipped with an adjustable carrier squelch.