TV TRANSMITTER A practical radio transmitter usually consists of these parts 1

Tv transmitter a practical radio transmitter usually

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TV TRANSMITTER A practical radio transmitter usually consists of these parts: 1. A power supply circuit to transform the input electrical power to the higher voltages needed to produce the required power output.
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TV TRANSMITTER 2. An electronic oscillator circuit to generate the radio frequency signal . This usually generates a sine wave of constant amplitude often called the carrier wave . In most modern transmitters this is a crystal oscillator in which the frequency is precisely controlled by the vibrations of a quartz crystal.
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TV TRANSMITTER 3. A modulator circuit to add the information to be transmitted to the carrier wave produced by the oscillator . This is done by varying some aspect of the carrier wave. The information is provided to the transmitter either in the form of an audio signal , which represents sound, a video signal , or for data in the form of a binary digital signal .
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TRANSMITTERS In an AM (amplitude modulation) transmitter the amplitude (strength) of the carrier wave is varied in proportion to the audio signal. In an FM (frequency modulation) transmitter the frequency of the carrier is varied by the audio signal.
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  • Spring '17
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