what is Transmitter?

what is Transmitter?

Transmitter (a transmitter circuit) main task is to perform useful modulation of low frequency to high frequency carrier signal, will it into a has certain bandwidth on a center frequency, suitable for the transmission of electromagnetic waves by the antenna.It is widely used in TV, radio, radar and other civil and military equipment.It can be divided into frequency modulation transmitter, amplitude modulation transmitter, optical transmitter and so on.

Name:  a transmitter circuit

Use:   Communications, television, radio, radar

Specialty:  National standards, diversity, economy

FM transmitter

    In general, FM transmitters are short for FM radio transmitters, mainly used for radio FM radio and music to be launched wirelessly.FM transmitter first, the audio signal and high frequency carrier modulation frequency modulation wave, the high frequency carrier frequency change along with the audio signal, again to the high frequency signal is amplified and incentives, power amplifier and a series of impedance matching, make the signal output to the antenna, sent out of the device.High frequency signal generation has frequency synthesis, PLL and so on.The frequency range of commercial FM broadcasting in China is 88 MHz ~ 108 MHz, the campus is 76 MHz ~ 87 MHz, and the western countries are 70 MHz ~ 90 MHz


Any FM radio, whatever its size (national radio stations at the provincial level, city radio station, radio station at the county level, township station, the village radio, campus radio, enterprises and institutions to radio station, radio station troops barracks, etc.), will be composed of audio broadcast control device, transmission equipment, FM transmitter and transmitting antenna.A radio station that covers a wide range of stations requires a high-power FM transmitter and a high-gain transmitter antenna to be mounted on a high ground level;The smaller radio stations need to transmit power small FM transmitters, gain appropriate antennas and erect them at the right height.Generally, the power level of FM transmitter is 1 W, 5 W, 10 W, 30 W, 50 W, 100 W, 300 W,

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