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Selection

and Operation

Selection

and

Operation

Wireless

Microphone

Systems

A Shure Educational Publication

Wireless

Microphone Systems

By Tim Vear

2ND EDITION

Contents

Main Selection and Operation Wireless Microphone Systems of Wireless Microphone Systems TABLE OF CONTENTS PART ONE WIRELESS MICROPHONE SYSTEMS: HOW THEYWORK CHAPTER 1 BASIC RADIOPRINCIPLES . . . . . . . . . . 5 I RADIO WAVE TRANSMISSION Part One: Wireless Microphone Systems: How They Work Page RADIO WAVE MODULATION SYSTEM DESCRIPTION INPUT SOURCES TRANSMITTER: GENERAL DESCRIPTION TRANSMITTER: AUDIO CIRCUITRY TRANSMITTER: RADIO CIRCUITRY RECEIVER: GENERAL DESCRIPTION RECEIVER: RADIO CIRCUITRY Page RECEIVER: AUDIO CIRCUITRY RECEIVER: SQUELCH RECEIVER:ANTENNA CONFIGURATION MULTIPATH RECEIVER: DIVERSITY TECHNIQUES Page ANTENNAS Page ANTENNA CABLE ANTENNA DISTRIBUTION LARGE ROOM/ MULTI-ROOM APPLICATIONS FREQUENCY BANDS FOR WIRELESS SYSTEMS THE VHF BAND UHF VS. VHF THE UHF BAND FREQUENCY SELECTION SYSTEM COMPATIBILITY OPERATING FREQUENCY INTERACTIONS: INTERMODULATION INTERNAL FREQUENCY INTERACTIONS: LO, IF, CRYSTAL MULTIPLIERS Page NON-SYSTEM RADIO INTERFERENCE BROADCAST TELEVISION Page 30 DTV VS. WIRELESS SYSTEMS Timetable for DTV transition: For a complete list of U.S. television frequencies... see Appendix B on page 57. BROADCAST RADIO OTHER RADIO SERVICES NON-BROADCAST SOURCES SPREAD SPECTRUM TRANSMISSION RANGE OF WIRELESS MICROPHONE SYSTEMS DIGITAL WIRELESS SYSTEMS Page OPERATION OF WIRELESS SYSTEMS OUTSIDE OF THE U.S. Wireless System Selection and Setup Part Two: Wireless Microphone Systems: How To Make Them Work SYSTEM SELECTION CRYSTAL-CONTROLLED VS. FREQUENCY SYNTHESIS SYSTEM SETUP: TRANSMITTER Page SYSTEM SETUP: RECEIVERS NO A 40 Page SYSTEM SETUP: RECEIVER ANTENNAS SYSTEM SETUP: BATTERIES SYSTEM CHECKOUT AND OPERATION Pre-Show Checkout: 43 Show Operation: COMPUTER-CONTROLLED WIRELESS SYSTEMS 44 TROUBLESHOOTING WIRELESS MICROPHONE SYSTEMS T ROUBLESHOOTING G PRESENTERS MUSICAL INSTRUMENTS VOCALISTS AEROBIC/DANCE INSTRUCTION THEATER WORSHIP BINGO FILM/VIDEOGRAPHY BROADCAST 51 POINT-TO-POINT WIRELESS Introduction Using wireless microphones for point-to-point Page Page C Appendix A CALCULATION OF INTERMODULATION PRODUCTS Appendix A 57 of Wireless Microphone Systems Appendix B US TELEVISION CHANNELS Channel Band Video Chroma Audio Page Page Page Page Suggested Reading Biography: Tim Vear Additional Shure Publications Available: Our Dedication to Quality Products