Radio frequency modulators are one type of modulators. A component that causes certain parameters or an optical or electrical signal, such as amplitude, intensity, frequency, or phase, to vary according to the pattern or another signal. A modulator is a device that restores the low frequency digital signal modulated in the high frequency digital signal by digital signal processing technology. Modulator is widely used in broadcasting (audio signal), television (video signal) and other information transmission and restoration. Modulators and modulators are usually used in pairs. The modulator is used to process the digital signal to the high-frequency signal for transmission, and the modulator is used to restore the digital signal to the original signal.
