(i) Define modulation index. (ii) Why is the amplitude of modulating signal kept less than the amplitude of carrier wave?
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(i) Define modulation index.
(ii) Why is the amplitude of modulating signal kept less than the amplitude of carrier wave?
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![Pulse Analog Modulation (Pulse Amplitude Modulation [PAM], Pulse Width Modulation [PWM], Pulse Position Modulation [PPM])](/static/compass_v2/subjects/engineering/electrical-engineering.svg)
- What is the problem with AM signal when overmodulation occurs?The modulation index of the PM signal is 2. If a modulating signal that has amplitude of 50 mV at a frequency of 3 kHz phase modulates a 90 kHz carrier signal, what would be the new modulation index of the signal? Assume that the amplitude of the modulating signal is increased by 50%.1)to VRMs value to generate a signal with a peak voltage of 10 V with a signal generator in a multisim program..................... must be entered. 2)) the frequency of the signal generator to produce a signal with a period of 10ms...................... must be entered as. What should come to the dotted line?
- For the C.R.O. square voltage waveform shown in Figure determine (a) the periodic time, (b) the frequency and (c) the peak-to-peak voltage. The 'time/cm' (or timebase control) switch is on 100 us/cm and the 'volts/cm' (or signal amplitude control) switch is on 20V/cm.In ............. type of test signal ,the signal will have high magnitude at one time .a. What is the condition for over modulation and what are its effects? b. Name the frequencies generated in the output of an Amplitude Modulator.
- Explain why there is phase inversion in common emitter amplifier.a) what should be the operating frequency to have a high frequency gain of 30 % lower that the mid band gain. Assume a DC gain of 100 dB & Dc cut – off frequency @ 15 KHz.?For the C.R.O. square voltage waveform shown in Figure determine (a) the periodic time, (b) the frequency and (c) the peak-to-peak voltage. The 'time/cm' (or time base control) switch is on 100 us/cm and the 'volts/cm' (or signal amplitude control) switch is on 20 V/cm.