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ASTRO 25 Conventional Systems System Planner

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ASTRO 25 Conventional Systems System Planner ASTRO 25 Conventional Systems System Planner R4-26-2000 January 2000 @ Motorola 1 This page left blank intentionally 2 TABLE OF CONTENTS SECTION 1. INTRODUCTION ...........................................................................................................................9 Project 25...........................................................................................................................................................9 Why Standards.................................................................................................................................................10 Why Motorola Supports Standards..................................................................................................................10 Project 25 and the RF-Subsystem..................................................................................................................11 ASTRO Digital Solutions ...............................................................................................................................11 Summary..........................................................................................................................................................12 About This System Planner .....................................................................................................................................13 SECTION 2. ASTRO SYSTEM TECHNOLOGIES.........................................................................................15 Overview .................................................................................................................................................................15 Project 25 ASTRO Conventional Platform.....................................................................................................15 Common Air Interface.....................................................................................................................................17 Mandatory Project 25 capabilities .......................................................................................................................18 Interoperable voice signaling features .............................................................................................................18 Project 25 capabilities that are Standard Options for Compliance: .....................................................................18 Above and beyond Project 25 compliance.......................................................................................................20 The ASTRO Transmitter .........................................................................................................................................21 STAGE 1: Voice processing...............................................................................................................................21 What is a Vocoder?..........................................................................................................................................22 Close-Up on Vocoder techniques ....................................................................................................................22 Close-Up on IMBE™ ......................................................................................................................................23 STAGE 2: Encryption.........................................................................................................................................24 Encryption enhancements................................................................................................................................25 Multiple algorithm...........................................................................................................................................26 Multikey ..........................................................................................................................................................27 STAGE 3: Error protection.................................................................................................................................28 Error protection and digital audio quality........................................................................................................28 STAGE 4: Embedded signaling..........................................................................................................................31 Analog signaling..............................................................................................................................................31 Embedded Digital Signaling Features .............................................................................................................33 Stand Alone Signaling .....................................................................................................................................35 Conventional Talkgroup Operation On Portables And Mobiles......................................................................35 Conventional Talk Group Operation radio features.........................................................................................35 Talkgroup hang time........................................................................................................................................36 Conventional talkgroups and secure multikey operation.................................................................................36 Formatting talkgroups in radio service software (RSS)...................................................................................36 ASTRO conventional talkgroups at the console ..............................................................................................36 STAGE 5: Four level digital modulation............................................................................................................37 Close-Up Four level modulation.....................................................................................................................38 The ASTRO receiver .......................................................................................................................................39 The ASTRO receiver DSP...............................................................................................................................39 Summary..........................................................................................................................................................39 SECTION 3: VOICE SYSTEMS .......................................................................................................................43 Overview .........................................................................................................................................................43 Voice System Components......................................................................................................................................43 ASTRO Field Radios...........................................................................................................................................43 ASTRO Portable Radios..................................................................................................................................43 ASTRO Digital SABER Portable Features......................................................................................................44 ASTRO SABER Frequency and Power...........................................................................................................45 ASTRO Digital XTS 3000 Portable Features..................................................................................................45 ASTRO XTS 3000 Frequency and Power .......................................................................................................46 ASTRO SPECTRA Radios............................................................................................................................46 ASTRO SPECTRA Frequency and Power ......................................................................................................48 ASTRO Mobile Choices..................................................................................................................................48 3 BACKWARD Compatibility of ASTRO Field Radios ...................................................................................48 Field Unit Modes and Programming................................................................................................................49 ASTRO Consolette ..........................................................................................................................................51 ASTRO Consolette Frequency and Power ......................................................................................................51 ASTRO Infrastructure .........................................................................................................................................54 ASTRO Stations ..............................................................................................................................................54 Station Design..................................................................................................................................................54 ASTRO Satellite Receivers .............................................................................................................................56 ASTRO Infrastructure Backward Compatibility .............................................................................................57
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