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Theories and Laws ==>

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What Is Phase

RMS And Peak To Peak

Pulses

Pulse Modulation

Magnetism

Heat

Harmonics

Generator Principle

Filters

Electro Magnetism

Conductors And Insulators

Clippers And Limiters

Norton's Theorem

Thévenin's Theorem

Superposition Theorem

Frequency Modulation

The Right-hand Rule

Coulomb's Law

Gauss's Law

Ampere's Law

OHM's Law

Kirchoff's Current Law

Kirchhoff's Voltage Laws

23 topics total

RMS And Peak To Peak

Pulses

Pulse Modulation

Magnetism

Heat

Harmonics

Generator Principle

Filters

Electro Magnetism

Conductors And Insulators

Clippers And Limiters

Norton's Theorem

Thévenin's Theorem

Superposition Theorem

Frequency Modulation

The Right-hand Rule

Coulomb's Law

Gauss's Law

Ampere's Law

OHM's Law

Kirchoff's Current Law

Kirchhoff's Voltage Laws

23 topics total

This is the principle of Radar; a short pulse is transmitted and then an echo listened for.

Fig.3 shows a long pulse and three short ones.

This generates the letter B in Morse Code.

Fig.4 shows Pulse Width Modulation (PWM).

The width of the pulse is determined by the amplitude of the modulating signal at that instant.

Fig. 5 shows Pulse Position Modulation (PPM).

Here the width and amplitude of the pulse are constant but its position is determined by the amplitude of the modulating signal.

PULSE CODE MODULATION is where the amplitude of the modulation is measured at regular intervals and a binary number generated to represent that amplitude.

Keywords : Pulse, Modulation, CODE, R.F., Principle, Radar, Morse, Code, PWM

20 Oct 2006 Fri

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