INTRODUCTION:-
The word monochrome stand for Black and white.
Monochrome tv transmitter means transmission of black and white signal.
Block diagram of monochrome tv transmitter :-
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Description of block diagram of monochrome tv transmission :-
Camera tube:-
It convert the optical signal, means light into image signals charge.
Scanning circuit:-
The function of scanning to convert the charge image into video signal variying with time to make it suitable for radio transmission.
Blanking pulse and synchronization pulse:-
This block uses sawtooth signal to provide trace of respective scanning process and falling edge provide retrace.
Video pre amplifier and power amplifier:-
These block are used for amplify composite video signal by video pre-amplifier and finally by the power amplifier to give sufficient power required for amplitude modulation.
Video carrier Generator (RF oscillator):-
The broadcast transmitter transmit at one and only one allowed frequency. This frequency are generated by RF oscillator.
Frequency multiplier:- this block are used for multiplication of frequency to get a desired frequency level.
Amplitude modulation:-
This block are used for modulation modulation of amplified video signal and RF carrier is to be done .
VSB (Vestigial side band) :-
In this block Vestigial sideband converts the output of double sideband into a signal side band by using Sharp filter.
Microphone:-
Microphone is a type of transducer which is used for change the audio signal into electrical signal by sensing of sound variations pressure.
Video carrier Generator (RF oscillator):-
The broadcast transmitter transmit at one and only one allowed frequency. This frequency are generated by RF oscillator.
Frequency multiplier:- this block are used for multiplication of frequency to get a desired frequency level.
Amplitude modulation:-
This block are used for modulation modulation of amplified video signal and RF carrier is to be done .
VSB (Vestigial side band) :-
In this block Vestigial sideband converts the output of double sideband into a signal side band by using Sharp filter.
Microphone:-
Microphone is a type of transducer which is used for change the audio signal into electrical signal by sensing of sound variations pressure.
Audio pre amplifier:-
In this block class A voltage amplifier amplify the weak signal into a desire level signal which is output of microphone.
Pre emphasis :-
It emphasizes the low energy of high radio frequency.
Radio carrier generator:-
In this blog a crystal oscillator are used for the purpose of carrier generate.
FM modulation:-
The modulator is used to modulate the audio signal for transmission.
Multiplier:-
The frequency of VHF and UHF allowed for transmission is obtained by multiplier.
Diplexer :-
It is used for avoiding the mixing of audio and video signal, and separate the audio & video signal.
Transmitting antenna:-
By this antenna we can transmit signal .This antenna change the electrical signal into electromagnetic waves signal .
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