Radio Amateur Quiz Canadian License

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Question A-006-002-002

A superheterodyne receiver designed for SSB reception must have a beat-frequency oscillator (BFO) because:

Correct Answer

the suppressed carrier must be replaced for detection

Explanation

SSB signals have their carrier suppressed. To demodulate (detect) SSB, a local carrier must be reinserted at the detector stage; this is the function of the Beat Frequency Oscillator (BFO).

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