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A message signal of frequecy 10 kHz and ...

A message signal of frequecy 10 kHz and peak voltage 10V is used to modulate a carrier wave of frequency 1 MHz and peak voltage 20V. Determine :
(i) The modulation index,
(ii) The side bands produced .

Text Solution

Verified by Experts

`f_m=10 kHz`
`V_m = 10V`
`F_C= 1 MHz`
`V_C= 20 V `
(i) Modulation index = `(V_C-V_m)/(V_C + V_m)`
`=(20 -10)/(20 + 10)`
`=(10)/(30)`
`=33%`
(ii) Side bands `=f_c pm f_m`
` =1000 pm 10kHz`
` = 1010 kHz & 990 kHz`
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