# F.M., A.M. and S.S.B. transmitters

### Explanation of question 5

Fig. 18.2 represents the block diagram of an FM transmitter. X and Y are respectively the

1. carrier oscillator and mixer
2. mixer and carrier oscillator
3. buffer amplifier and modulator
4. modulator and buffer amplifier

The answer is :- 4 In an f.m. transmitter, the modulator is the first stage after the microphone. As previously discussed under oscillators, the oscillator is followed by a buffer amplifier.

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