RF modulator

An RF modulator is a device that takes signals from devices like your TV, video game console, VCR, DVD player, or Blu-ray player and converts them into an analog radio frequency (RF) signal. This signal can then be used to connect to an old-style analog TV that doesn't have the newer digital inputs, like HDMI or DVI. So, an RF modulator lets you watch movies and play games on an older-style TV by transforming the signal from these devices so it can be understood by the TV.