# Transmitter interference

### Explanation of question 4

With double sideband, full carrier amplitude modulated transmission, an AF bandwidth of 3kHz will produce an RF bandwidth of

1. 6kHz
2. 3kHz
3. 1.5kHz
4. 0.75kHz

The answer is :- 1The a.f. bandwidth directly determines the r.f. bandwidth for both a.m. and s.s.b. transmission. Amplitude modulation has two sidebands and therefore an a.f. bandwidth of 3kHz will produce an r.f. bandwidth of 2 x 3kHz, i.e. 6 kHz.

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