1. The Voltage spectrum of FM signal is shown in Figure 1. The maximum amplitude of modulating signal is 5V. Calculate the bandwidth , modulation index ,Carrier frequency, modulating frequency and specify the type of Modulator(narrow band or wide band). 1.54 4.06 4.06 2.45 2.45 0.91 0.91 0.21 0.21 192 194 196 198 200 202 204 206 208 KHz

1. The Voltage spectrum of FM signal is shown in Figure 1. The maximum amplitude of modulating signal is 5V. Calculate the bandwidth , modulation index ,Carrier frequency, modulating frequency and specify the type of Modulator(narrow band or wide band). 1.54 4.06 4.06 2.45 2.45 0.91 0.91 0.21 0.21 192 194 196 198 200 202 204 206 208 KHz

Introductory Circuit Analysis (13th Edition)

13th Edition

ISBN:9780133923605

Author:Robert L. Boylestad

Publisher:Robert L. Boylestad

Chapter1: Introduction

Section: Chapter Questions

Problem 1P: Visit your local library (at school or home) and describe the extent to which it provides literature...

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Good day! Question: What is the importance of Modulator and Demodulator (functions) in FM.
3. The role of mixer in the Armstrong modulator is to. a) raise the carrier frequency b) lower the carrier frequency c) to change the carrier frequency to any required value For AMDSB-SC, The carrier is suppressed using a) A mixer b) A frequency multiplier c) A balance modulator 5. In FM modulation, frequency deviation is equal to .........., if the amplitude of the modulating signal is 4 V, and the frequency sensitivity of the modulator is 30 Hz/V. a) 120 Hz b) 34 Hz c) 100 Hz 6. A voltage controlled oscillator (VCO) is an oscillator that its frequency output is varied according to any change in the ............... at its input. 4. a) Frequency b) Current c) Voltage Q1: (B) Draw A block diagram to generate the SSB using Hilbert Transform method, Write an equation for an input, and output signals?
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Differentiate FM and PM.
modulating signal amplitude wideband FM dependent %m carrier swing Prompts Submitted Answers It determines the rate of frequency shift Choose a match frequency deviation The peak to peak frequency deviation Choose a match narrowband FM FM with modulation index between 1 and 10 Choose a match modulation index The ratio of actual frequency deviation to the maximum Choose a match modulating frequency allowable frequency deviation expressed in percentage. midband FM Frequency deviation of the carrier is to the Choose a match amplitude of the modulating signal. proportional inverse proportional
The baseband signal modulates a 98 kHz carrier sine wave. Using frequency and amplitude labelling similar to that in Figure 2, sketch the spectrum of the modulated signal using a template, similar to that in Figure 3, for the following modulations: AM with the amplitude of the carrier wave being 20 V DSBSC SSB – the lower sideband SSB – the upper sideband
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%.
Q2. An angle modulated signal with a sinusoidal carrier 100 cos Znfat and a sinusoidal message with frequency fa-20 Hz, knowing that -0.7, a) Draw the single sided spectrum b) Determine the modulated signal bandwidth. c) Determine the 70% and 90% bandwidth and transınitted power.