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1-Why PPM is said to be better than PWM?

1-Why PPM is said to be better than PWM?

Introductory Circuit Analysis (13th Edition)
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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To modulate a pulse carrier with sinusoidal signal to obtain a Pulse Position Communication system lab. Experiment 3: Pulse position Modulation Department of EME Object: Modulated signal. EQUIPMENT: 1. Experimental training board. 2. Oscilloscope. lab THEORY: The amplitude and width of the pulses is kept constant in this system, while the position of each pulse is varied by each instantaneous sampled value of the modulating wave. Pulse Position Modulation(PPM) has the advantage of requiring constant transmitter power output, but the disadvantage of depending on transmitter receiver synchronization. PROCETURE: 1. Connect the CRO probe to the socket marketed TP2,the wave form should be a sinusoidal as shown in fig.2(a). 2. Now move the CRO probe from TP2 and connect it to TP1.the waveform here should resemble that of fig.2(b)i.e., a pulse train(carrier). 3. Connect TP1 to input terminal & TP2 to input terminals and switch on the main supply. Observe the waveform on the CRO at TP3. DISCUSSION: 1-Why PPM is said to be better than PWM? 2-What are the disadvantages of PPM? 3-Discuss your results?
Transcribed Image Text:To modulate a pulse carrier with sinusoidal signal to obtain a Pulse Position Communication system lab. Experiment 3: Pulse position Modulation Department of EME Object: Modulated signal. EQUIPMENT: 1. Experimental training board. 2. Oscilloscope. lab THEORY: The amplitude and width of the pulses is kept constant in this system, while the position of each pulse is varied by each instantaneous sampled value of the modulating wave. Pulse Position Modulation(PPM) has the advantage of requiring constant transmitter power output, but the disadvantage of depending on transmitter receiver synchronization. PROCETURE: 1. Connect the CRO probe to the socket marketed TP2,the wave form should be a sinusoidal as shown in fig.2(a). 2. Now move the CRO probe from TP2 and connect it to TP1.the waveform here should resemble that of fig.2(b)i.e., a pulse train(carrier). 3. Connect TP1 to input terminal & TP2 to input terminals and switch on the main supply. Observe the waveform on the CRO at TP3. DISCUSSION: 1-Why PPM is said to be better than PWM? 2-What are the disadvantages of PPM? 3-Discuss your results?
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