Motorola Mototrbo - Page 3

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Section 1 Introduction
1.1 Welcome to MOTOTRBO
TM
! ................................................................................ 1
1.2 Software Version .................................................................................................. 2
Section 2 System Feature Overview
2.1 MOTOTRBO Digital Radio Technology................................................................ 3
2.1.1 Digital Radio Technology Overview ............................................................ 3
2.1.1.1 Part One: The Analog to Digital Conversion...................................... 3
2.1.1.2 Part Two: The Vocoder and Forward Error Correction (FEC) ........... 3
2.1.1.3 Part Three: Framing........................................................................... 4
2.1.1.4 Part Four: TDMA Transmission ......................................................... 4
2.1.1.5 Standards Compliance ...................................................................... 4
2.1.2 Spectrum Efficiency via Two-Slot TDMA .................................................... 5
2.1.2.1 Frequencies, Channels, and Requirements for
Spectrum Efficiency ............................................................................... 5
2.1.2.2 Delivering Increased Capacity in Existing 12.5 kHz Channels .......... 5
2.1.2.3 Two-Slot TDMA Reduces Infrastructure Equipment.......................... 7
2.1.2.4 Two-Slot TDMA Enables System Flexibility....................................... 8
2.1.2.5 Two-Slot TDMA System Planning Considerations ............................ 9
2.1.3 Digital Audio Quality and Coverage Performance....................................... 9
2.1.3.1 Digital Audio Coverage .................................................................... 10
2.1.3.2 Predicting Digital Audio Coverage ................................................... 11
2.1.3.3 User Expectations for Digital Audio Performance............................ 12
2.1.3.4 Audio Balancing............................................................................... 13
2.2 Basic System Topologies for Digital and Analog Operations ............................. 14
2.2.1 Repeater and Direct Mode Configurations................................................ 14
2.2.2 MOTOTRBO Supports Analog and Digital Operation ............................... 20
2.2.3 MOTOTRBO Channel Access .................................................................. 20
2.2.3.1 Impolite Operation (Admit Criteria of “Always”) ............................... 21
2.2.3.2 Polite to All Operation (Admit Criteria of “Channel Free”)................ 22
2.2.3.3 Polite to Own Digital System Operation (Admit Criteria
of “Color Code Free”) ........................................................................... 22
2.2.3.4 Polite to Other Analog System Operation (Admit Criteria
of “Correct PL”) .................................................................................... 22
2.2.3.5 Polite or Impolite, or Voice Interrupt While Participating
in a Call (In Call Criteria) ...................................................................... 23
2.2.3.6 Repeater Wake-up Provisioning ...................................................... 24
2.3 MOTOTRBO Digital Features ............................................................................ 25
2.3.1 Digital Voice Features ............................................................................... 25
2.3.1.1 Group Calls...................................................................................... 25