A product detector uses which process to demodulate signals?

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Multiple Choice

A product detector uses which process to demodulate signals?

Product detectors recover the audio by multiplying the received RF signal with a locally generated carrier signal in a mixer. This nonlinear mixing produces sum and difference frequencies, and the difference frequency is the baseband audio. After filtering out the high-frequency components, the audible signal is retrieved. The locally generated carrier (often from a beat-frequency oscillator in SSB receivers) is what allows the correct audio to emerge. Simply filtering won't demodulate, and amplifying or modulating would not extract the original audio signal.

Product detectors recover the audio by multiplying the received RF signal with a locally generated carrier signal in a mixer. This nonlinear mixing produces sum and difference frequencies, and the difference frequency is the baseband audio. After filtering out the high-frequency components, the audible signal is retrieved. The locally generated carrier (often from a beat-frequency oscillator in SSB receivers) is what allows the correct audio to emerge. Simply filtering won't demodulate, and amplifying or modulating would not extract the original audio signal.

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