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design of the transmiter

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saeed131

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hi .

how does this circuit work?
what does this do?
plz help me?
 

Video transmitter (CH 2-4): Q3 audio subcarrier FM oscillator, Q1+Q2 modulation amplifier, Q4 oscillator, Q5+Q6 output stage.
 

+
D1 video clamper
Q3+T1 5.5MHz frequency for PAL B/G
video modulation: negative AM
audio modulation: FM
 

what is the shape of output signal?
 

what a software that u use?
 

I think Q1+ Q2 are LNA and Q4 is an oscillator.

The rest is the same as others have mentioned.
 

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