What is a RF modulator?

A circuit block or a single external unit that converts baseband video and audio signals (AV signals) into RF signals (Radio Frequency: signals in the broadcast wave frequency band) is called an RF modulator. As for the signal connection configuration, video and audio baseband signals are input to the RF modulator from a PIN terminal connector or other dedicated terminals. This signal is converted internally and output from the RF coaxial cable. RF modulators that are single external units are rarely used today, and are not produced by manufacturers, so the only way to obtain them is second-hand items on the Internet.

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