Which device separates the incoming signal from the video and audio components?

Which device separates the incoming signal from the video and audio components?

• A. Demodulators
• B. Modulators
• C. Amplifiers
• D. Filters

Answer: (A)

The key idea is recovery of the original information from a modulated carrier. A demodulator decodes the modulation on the incoming RF signal and returns the baseband video and the accompanying audio to their proper paths. In other words, it separates or extracts the actual content (video and audio) from the modulated signal so it can be processed and displayed. A modulator would do the opposite—put content onto a carrier. An amplifier only boosts signal power, and a filter shapes or selects frequencies but doesn’t reconstruct the video and audio streams from the carrier.

The key idea is recovery of the original information from a modulated carrier. A demodulator decodes the modulation on the incoming RF signal and returns the baseband video and the accompanying audio to their proper paths. In other words, it separates or extracts the actual content (video and audio) from the modulated signal so it can be processed and displayed. A modulator would do the opposite—put content onto a carrier. An amplifier only boosts signal power, and a filter shapes or selects frequencies but doesn’t reconstruct the video and audio streams from the carrier.