Question
Download Solution PDFWhen a carrier is AM modulated by three single tone signals of modulation percentages 50%, 50% and 20%, then the effective modulation index of the resulting signal is:
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFConcept:
When a carrier is amplitude modulated by multiple independent modulating signals, the effective modulation index is calculated using the square root of the sum of the squares of individual modulation indices.
Effective modulation index, \( m_{eff} = \sqrt{m_1^2 + m_2^2 + m_3^2} \)
Given:
Modulation percentages are 50%, 50%, and 20%.
So, \( m_1 = 0.5, \; m_2 = 0.5, \; m_3 = 0.2 \)
Calculation:
\( m_{eff} = \sqrt{(0.5)^2 + (0.5)^2 + (0.2)^2} = \sqrt{0.25 + 0.25 + 0.04} = \sqrt{0.54} \)
Last updated on Jun 24, 2025
-> ISRO Scientist Engineering apply online 2025 link has been activated (ISRO:ICRB:03(CEPO):2025).
-> A total of 39 vacancies are announced for the ISRO recruitment in Civil, RAC and other disciplines
-> ISRO Scientist Engineering recruitment 2025 notification has been released for 320 vacancies. The last date to fill ISRO application form is June 16 (Advt No. ISRO:ICRB:02(EMC):2025).
-> ISRO Scientist Engineer recruitment 2025 for 31 vacancies has been released.
->ISRO Scientist recruitment 2025 notification has been released.
->The last date to apply for ISRO scientist recruitment 2025 is May 30 ( Advt.No. ISRO:ICRB:01:(EMC):2025).
->Candidates with BE/BTech degree in the respective discipline can only apply for ISRO Scientist recruitment 2025.
-> Candidates can refer ISRO Scientist previous year paper to prepare for the exam.