What is a product detector?

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Multiple Choice

What is a product detector?

A product detector changes the received signal into audio by mixing it with a locally generated carrier. When the incoming signal is multiplied by this locally produced carrier, the mixer creates sum and difference frequencies. The difference frequency carries the audio information, and after filtering, you hear the recovered sound. This approach is especially important for modes like single-sideband or suppressed-carrier signals, where the original carrier isn’t present in the received signal and must be re-created locally to extract the message. The other descriptions refer to an oscillator that provides a carrier, a simple filter/amplifier stage, or distortion products, none of which define what a product detector does.

A product detector changes the received signal into audio by mixing it with a locally generated carrier. When the incoming signal is multiplied by this locally produced carrier, the mixer creates sum and difference frequencies. The difference frequency carries the audio information, and after filtering, you hear the recovered sound. This approach is especially important for modes like single-sideband or suppressed-carrier signals, where the original carrier isn’t present in the received signal and must be re-created locally to extract the message. The other descriptions refer to an oscillator that provides a carrier, a simple filter/amplifier stage, or distortion products, none of which define what a product detector does.

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