In AM modulation, a signal is modulated on a carrier wave such that maximum and minimum amplitudes are found to be 6V and 2V respectively. The modulation index is

<p>Modulation index = <math><mrow><mfrac><mrow><msub><mrow><mi>A</mi></mrow><mrow><mi>m</mi><mi>a</mi><mi>x</mi></mrow></msub><mo>−</mo><msub><mrow><mi>A</mi></mrow><mrow><mi>m</mi><mi>i</mi><mi>n</mi></mrow></msub></mrow><mrow><msub><mrow><mi>A</mi></mrow><mrow><mi>m</mi><mi>a</mi><mi>x</mi></mrow></msub><mo>+</mo><msub><mrow><mi>A</mi></mrow><mrow><mi>m</mi><mi>i</mi><mi>n</mi></mrow></msub></mrow></mfrac><mo>=</mo><mfrac><mrow><mn>6</mn><mo>−</mo><mn>2</mn></mrow><mrow><mn>6</mn><mo>+</mo><mn>2</mn></mrow></mfrac><mo>=</mo><mn>0</mn><mo>.</mo><mn>5</mn><mo>≈</mo><mn>5</mn><mn>0</mn><mn>%</mn></mrow></math></p>

0 Upvotes 0 Upvotes 0 Downvotes

• • Report Abuse
• Comment