Question
Download Solution PDFThe frequency deviation produced in a VHF carrier by a signal of 100 Hz is 50 kHZ. The frequency modulation index is
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFConcept:
In FM (Frequency Modulation), the modulation index is defined as the ratio of frequency deviation to the modulating frequency.
Mathematically, this is defined as:
\(m_f=\frac{Δ f}{f_m}\)
mf = Modulation index
Δf = Frequency deviation
fm = Modulating frequency
Calculation:
Given Δf = 50 kHz
fm = 100 Hz
\(m_f=\frac{50~kHz}{100~Hz}\)
mf = 500 radians
A wave has 3 parameters Amplitude, Phase, and Frequency. Thus there are 3 types of modulation techniques.
Amplitude Modulation: The amplitude of the carrier is varied according to the amplitude of the message signal.
Frequency Modulation: The frequency of the carrier is varied according to the amplitude of the message signal.
Phase Modulation: The Phase of the carrier is varied according to the amplitude of the message signal.
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