Question
Download Solution PDFWhat is the modulation index in a frequency modulated signal with a modulating frequency of 500 Hz and frequency deviation of 10 kHz?
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:
mf = Modulation index
Δf = Frequency deviation
fm = Modulating frequency
Calculation:
Given Δf = 10 kHz
fm = 500 Hz
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.
Last updated on May 30, 2025
-> The ISRO Technical Assistant recruitment 2025 notification has been released at the official website.
-> Candidates can apply for ISRO recruitment 2025 for Technical Assistant from June 4 to 18.
-> A total of 83 vacancies have been announced for the post of Technical Assistant.
-> The Selection process consists of a written test and a Skill test.
-> Candidates can also practice through ISRO Technical Assistant Electrical Test Series, ISRO Technical Assistant Electronics Test Series, and ISRO Technical Assistant Mechanical Test Series to improve their preparation and increase the chance of selection.