Is a device that serves to combine signals or modify the properties of the style one or several of the signal wave, pha (the signal is a high-frequency carrier) with a signal that is sent through the?
A device that acts Modulation. Or modify the characteristics of one or several of the carrier wave signal (signal at a frequency higher transportation) with the data to be passed.
A device that acts combine signals. Or modify the properties of one or several of the image signal carrier signal at a high frequency (transport) with the data signal to be transmitted.