Telecommunications Communications Technologies

Digital Modulation (PCM / DPCM / Delta)

Courseware Sample 39863-F0

© Festo Didactic 39863-10 III

Safety and Common Symbols

Caution, risk of danger

Safety and Common Symbols

IV © Festo Didactic 39863-10

© Festo Didactic 39863-10 V

Table of Contents

Table of Contents

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SNQR

Table of Contents

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Table of Contents

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Table of Contents

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Table of Contents

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Preface

Preface

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About This Manual

Manual Objective

Description

a In this manual, all New Terms are defined in the Glossary of New Terms. In addition, an index of New Terms is provided.

Safety considerations

About This Manual

XVI © Festo Didactic 39863-10

Systems of units

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To the Instructor

Accuracy of measurements

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Quantizing

xi xiyi

x0 xnq

NA

Aq n

q A n N

Characteristics of Quantization Noise

Exercise 2-2

EXERCISE OBJECTIVE

DISCUSSION OUTLINE

DISCUSSION

Ex. 2-2 – Characteristics of Quantization Noise Discussion

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q

Distortion due to quantizing

Ex. 2-2 – Characteristics of Quantization Noise Discussion

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Ex. 2-2 – Characteristics of Quantization Noise Procedure Outline

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Set-up and connections

PCM

b Exit File

Default

b Default

Effect of sampling frequency on quantization noise

PROCEDURE OUTLINE

PROCEDURE

File Restore Default Settings returns all settings to their default values, but does not deactivate activated faults.

Ex. 2-2 – Characteristics of Quantization Noise Procedure

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Channel 1 ............................... 1 V/div Channel 2 ............................... 1 V/div Channel E ............................... 1 V/div Time Base ........................ 0.2 ms/div Trigger Slope ........................... Rising Trigger Level ................................ 0 V Trigger Source ............................. Ext

Maximum Input ...................... 10 dBV Scale Type ...................... Logarithmic Scale ................................ 10 dBV/div Averaging ...................................... Off Time Window ......................... Square Frequency Span ................. 5 kHz/div Reference Frequency .............. 0 kHz

fs fm

Ex. 2-2 – Characteristics of Quantization Noise Procedure

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Channel 1 ............................... 1 V/div Channel 2 ....................... 100 mV/div Channel E ............................... 1 V/div

Maximum Input ...................... 10 dBV Frequency Span .................5 kHz/div

fm

fs fm

Ex. 2-2 – Characteristics of Quantization Noise Procedure

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fs fm

Ex. 2-2 – Characteristics of Quantization Noise Procedure

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Effect of resolution on quantization noise

Ex. 2-2 – Characteristics of Quantization Noise Procedure

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Channel 1 ............................... 1 V/div Channel 2 ....................... 100 mV/div Channel E ............................... 1 V/div

Maximum Input ....................... 0 dBV Frequency Span ................. 5 kHz/div

fs fm

fs fm

Ex. 2-2 – Characteristics of Quantization Noise Procedure

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fs fm

Effect of low-pass filtering the PCM Decoder output signal

Ex. 2-2 – Characteristics of Quantization Noise Procedure

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Channel 1 ............................... 1 V/div Channel 2 ............................... 1 V/div Channel E ............................... 1 V/div Time Base ........................ 0.2 ms/div Trigger Slope ........................... Rising Trigger Level ................................ 0 V Trigger Source ............................. Ext

Maximum Input ..................... 10 dBV Scale Type ......................Logarithmic Scale ................................ 10 dBV/div Averaging ..................................... Off Time Window ......................... Square Frequency Span ................. 2 kHz/div Reference Frequency .............. 0 kHz

fs fm

Ex. 2-2 – Characteristics of Quantization Noise Procedure

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fs fm

fs fm

Ex. 2-2 – Characteristics of Quantization Noise Conclusion

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a It is your responisiblity to ensure that any signal from an external source is compatible with the inputs of the Data Acquisition Interface, Model 9466. The analog inputs of this module are designed for a voltage range of ±1.5 V and have an impedance of 10 k .

CONCLUSION

REVIEW QUESTIONS

Ex. 2-2 – Characteristics of Quantization Noise Review Questions

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Bibliography

Digital Telephony

Telecommunication Systems

Communication Systems

PCM and Digital Transmission Systems

Digital and Analog Communication Systems

Analog, and Data Communication

Digital Transmission Systems

Introduction to Communication Systems