Question

Which of the following rules states that the bandwidth required to transmit an angle modulated wave is twice the sum of the peak frequency deviation and highest modulating signal frequency?
1. Signal rule
2. Spectrum rule
3. Carson's rule
4. Bandwidth rule

Answer 1

Correct Answer - Option 3 : Carson's rule

Explanation:

Carson's rule states that the bandwidth required to transmit an angle modulated wave is twice the sum of the peak frequency deviation and highest modulating signal frequency.

According to Carson rule signal, BW is given as:

B.W = (β + 1) 2fm

\(\becauseβ=\frac{Δf}{f_m} \)

B.W. = 2[Δf + fm]          

If multiple frequencies are available in modulating signal then,

B.W. = 2(β + 1) fmax