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

### Explanation of question 20

Changing from upper sideband to lower sideband on an SSB transmitter is normally achieved by changing the

1. frequency of the VFO
2. frequency of the carrier oscillator
3. pass band of the speech amplifier
4. pass band of the balanced modulator

The answer is :- 2 Switching sidebands is normally achieved by switching to a different crystal in the carrier oscillator.

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