Chapter 1 Amplitude Modulation

• Sine Wave Characteristics
• Generation Of Sine Waves
• Vector Applied To Sine-Wave Generation
• Vector Applied To Sine-Wave Generation - Continued
• Figure 1-3.—Generation Of Sine-Wave Voltage.
• Amplitude
• Wavelength
• Table 1-1.—Radio Frequency Versus Wavelength
• Heterodyning
• Linear Impedance
• Figure 1-4b.—Circuit With One Linear Impedance.
• Figure 1-5b.—Circuit With Two Linear Impedances.
• Figure 1-6.—Circuit With Parallel Linear Impedances.
• Figure 1-7c.—Linear Impedance Circuit
• Nonlinear Impedance
• Combined Linear And Nonlinear Impedances
• Ac Applied To Linear And Nonlinear Impedances
• Figure 1-11a.—Circuit With Nonlinear Impedances.
• Two Sine Wave Generators In Linear Circuits
• Figure 1-14a.—Waveforms Across Two Nonlinear Impedances.
• Two Sine Wave Generators And A Combination Of Linear And Nonlinear Impedances
• Figure 1-16.—Sine-Wave Generators With A Combination Of Impedances.
• Figure 1-17d.—Frequency Relationships.
• Spectrum Analysis
• Amplitude-Modulated Systems
• Figure 1-20.—International Morse Code.
• Figure 1-22a.—Essential Elements Of On-Off Keying.
• Keying Methods
• Blocked-Grid Keying
• Keying Relays
• Spectrum Analysis
• Single-Stage Transmitters
• Multistage Transmitters
• Multistage High-Power Transmitters
• Hf And Vhf Transmitters
• Microphones
• Figure 1-33a.—Carbon Microphones. Single-Button Carbon Microphone.
• Crystal Microphone
• Dynamic Microphone
• Figure 1-36.—Magnetic Microphone Action.
• Am Transmitter Principles
• Figure 1-38.—Radio-Frequency Spectrum.
• Bandwidth Of An Am Wave
• Analysis Of An Am Wave
• Percent Of Modulation In An Am Wave - Continued
• Percent Of Modulation In An Am Wave - Continued
• Percent Of Modulation In An Am Wave - Continued
• Percent Of Modulation In An Am Wave - Continued
• Vector Analysis Of An Am Wave
• Envelope Development From Vectors
• Envelope Development From Vectors - Continued
• Modulation Level Of An Am Wave
• Modulation Systems
• Plate Modulator Circuit Operation
• Figure 1-46.—Plate-Modulator Waveforms.
• Collector-Injection Modulator
• Figure 1-47.—Collector-Injection Modulator.
• Control-Grid Modulator
• Base-Injection Modulator
• Emitter-Injection Modulator
• Summary
• Frequency
• Continuous-Wave Modulation
• Key-Click Filters
• Multistage Cw Transmitters
• Crystal Microphone
• Magnetic Microphone
• Modulation Envelope
• High-Level Modulation
• Collector-Injection Modulator
• Base-Injection Modulator
• Emitter-Injection Modulator
• Answers To Questions Q1. Through Q46.
• Answers To Questions Q1. Through Q46.

Chapter 2 Angle And Pulse Modulation

• Angle And Pulse Modulation
• Comparing Fsk And Cw Signals
• Figure 2-2a.—Comparison Of Am And Fm Receiver Response To An Am Signal.
• Cw Signals
• Fsk Signals.
• Methods Of Frequency Shifting
• Advantages Of Fsk Over Am
• Figure 2-5.—Effect Of Frequency Modulation On An Rf Carrier.
• Figure 2-6.—Oscillator Circuit Illustrating Frequency Modulation.
• Figure 2-7b.—Capacitance Change In An Oscillator Circuit During Modulation
• Percent Of Modulation
• Modulation Index
• Table 2-1.—Modulation Index Table
• Figure 2-10.—Frequency Deviation Versus Bandwidth.
• Methods Of Frequency Modulation
• Semiconductor Reactance Modulator
• Figure 2-12.—Reactance-Semiconductor Fm Modulator.
• Multivibrator Modulator
• Varactor Fm Modulator
• Figure 2-15b.—Varactor Symbol And Schematic. Simplified Circuit.
• Phase Modulation
• Figure 2-19.—Carrier With And Without Modulation.
• Modulation Index
• Basic Modulator
• Figure 2-22.—Phase Shifting A Sine Wave.
• Phase-Shift Keying
• Figure 2-25d.—Phase-Shift Keying. Modulated Carrier After Filtering.
• Figure 2-26d.—Simulated Phase-Shift Keying. Digital Modulation After Filtering.
• Pulse Modulation
• Figure 2-28.—Spectrum Distribution When Modulating With A Square Wave.
• Figure 2-29d.—Various Square-Wave Modulation Levels With Frequency-Spectrum Carrier And Sidebands.
• Pulse Timing
• Figure 2-31c.—Varying Pulse-Modulating Waves.
• Figure 2-32c.—Carrier Frequency.
• Figure 2-33.—Pulse-Repetition Time (Prt).
• Power In A Pulse System
• Applications Of Pulse Modulation
• Radar Modulation
• Thyratron Modulator
• Communications Pulse Modulators
• Figure 2-40.—Pulse Train.
• Pulse-Amplitude Modulation
• Pulse-Time Modulation
• Pulse-Duration Modulation
• Pulse-Position Modulation
• Pulse-Frequency Modulation
• Pulse-Code Modulation
• Figure 2-48a.—Quantization Levels. Modulation.
• Figure 2-49.—Binary Numbers And Pulse-Code Equivalents.
• Figure 2-51.—Pulse-Code Modulation Of A Quantized Wave (32 Bits).
• Figure 2-52.—Block Diagram Of Quantizer And Pcm Coder.
• Summary
• Frequency Modulation
• Modulation Index
• Semiconductor-Reactance Modulator
• Multivibrator Modulator
• Basic Phase Modulator
• Pulse Modulation
• Pulse-Repetition Frequency (Prf)
• Pulse-Amplitude Modulation (Pam)
• Pulse-Frequency Modulation (Pfm)
• Answers To Questions Q1. Through Q29.
• Answers To Questions Q1. Through Q29.

Chapter 3 Demodulation

• Continuous-Wave Demodulation
• Heterodyne Detection
• Figure 3-3c.—Heterodyne Detection. Mixed-Frequency Signal.
• Regenerative Detector
• Am Demodulation
• Series-Diode Detector
• Shunt-Diode Detector
• Common-Emitter Detector
• Common-Base Detector
• Slope Detection
• Foster-Seeley Discriminator
• Circuit Operation At Resonance
• Disadvantages
• Ratio Detector
• Operation Above Resonance
• Operation Below Resonance
• Circuit Operation
• Circuit Operation - Continued
• Circuit Operation - Continued
• Phase Demodulation
• Phase Demodulation - Continued
• Pulse Demodulation
• Low-Pass Filter
• Conversion
• Pulse-Code Modulation
• Figure 3-23.—Pcm Conversion.
• Summary
• Regenerative Detector
• Shunt- (Current-) Diode Detector
• Common-Base Detector
• Gated-Beam Detector
• Peak Detection
• Answers To Questions Q1. Through Q40. - Continued
• Answers To Questions Q1. Through Q40. - Continued

Appendix I Glossary

• Appendix I - Continued
• Appendix I - Continued
• Appendix I - Continued
• Appendix I - Continued
• Appendix I - Continued
• Appendix I - Continued

Index

• Index - Continued

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