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Receivers

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AM 455 KHzFM 10.7 MHz

455 KHz 42 MHz33.4 MHz

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3- +

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mixer

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1000 KHz1455 KHz

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Audio Amplifier

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Q6

Q7

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AudioIN

90

Modulation

:

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PM,FM,AM

2-Pulse Modulation)Digital(

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3-Coding )Analog()Digital(

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91

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AMAmplitude Modulation RF carrier

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6 KHz±3 KHz1MHz1,003,000997,000MHz

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800

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Hz

Hz Hz

Hz

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93

FMRF carrier

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PMphase

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95

PDM / PTM / PWM / PLMPulse – Duration / Time / Width / Length Modulation

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96

Pulse - Code Modulation PCM

[PAM] [Analog to Digital Converter][ADC])Channel(

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TCMTrellis – Code Modulation Gottfried Ungerboeck1980

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01)163(.

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97

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Digital Modulation

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98

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Feedback. (

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PLL

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pass filterDC Amp

voltage control oscillator) Vco(DC amp ,

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low pass filter DC)DC Amp (.

PLL

)(.

99

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PM.

Phasedetector

Lowpassfilter

BufferDCamp

VoltageControl

oscillater

Feedback

PLL

OutputRemote IN

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