An RF Modulator is a device converting audio/video signals into RF (radio frequency) signal.
RF modulators are used to connect modern DVD players, video game systems, camcorders and other video components to TV sets built without A/V inputs.
In that case the connection is made from the DVD (or other component) a/v outputs to the RF Modulator and from the RF Modulator to the TV's antenna input jack
(or as it is called: BNC connector).
Features:
Combines audio/video line-level signals into an RFoutput signal. (necessary for televisions with only a 75-ohm RF coaxial input)
Separate antenna/cable TV input. (eliminates the need for switching cables back and forth)
Channel 3 or 4 output selector switch. (ensures compatibility with most televisions)
Auto sensing A/B switch. (automatically switches back and forth between antenna and video source)
