User's Manual

Contents
Crescendo VHF Half-Duplex User Manual Page 3 of 74
Contents
1. Introduction ................................................................................................................................................................................... 6
2. Installation ..................................................................................................................................................................................... 7
2.1 General considerations............................................................................................................................................................. 7
2.2 External antennas ..................................................................................................................................................................... 7
2.3 Safety and Compliance ............................................................................................................................................................. 8
2.3.1 Human Exposure to Emissions ......................................................................................................................................... 8
2.3.2 Modifications .................................................................................................................................................................... 8
3. Configuration ................................................................................................................................................................................. 9
3.1 Overview ................................................................................................................................................................................... 9
3.2 Cruise Control ........................................................................................................................................................................ 10
3.2.1 Installation ...................................................................................................................................................................... 10
3.2.2 Connecting to a Local Device ......................................................................................................................................... 10
3.2.3 Saving and Loading Configurations ............................................................................................................................... 11
3.3 Terminal Menu Interface ........................................................................................................................................................ 11
3.4 Hayes AT Command Interface ................................................................................................................................................ 12
3.5 Front Panel Interface ............................................................................................................................................................. 13
3.5.1 RSSI, Tx Power, Temperature Status (Mode 2, 3, 4) ..................................................................................................... 13
3.5.2 Main Serial Port Status (Mode 5) ................................................................................................................................... 14
3.5.3 Radio Status LEDs (Mode 1) .......................................................................................................................................... 14
4. Serial Port Operation .................................................................................................................................................................. 16
4.1 Overview ................................................................................................................................................................................. 16
4.2 Configuration ......................................................................................................................................................................... 17
4.3 Advanced Features ................................................................................................................................................................. 17
4.3.1 Control Lines .................................................................................................................................................................. 17
4.3.2 Packetiser Timers ............................................................................................................................................................ 18
4.4 Statistics .................................................................................................................................................................................. 19
5. Radio Operation .......................................................................................................................................................................... 21
5.1 Data-Driven Mode .................................................................................................................................................................. 21
5.2 Packet-Driven Mode ............................................................................................................................................................... 21
5.2.1 Data Path ......................................................................................................................................................................... 22
5.3 Radio Parameters ................................................................................................................................................................... 23
5.3.1 Addressing ...................................................................................................................................................................... 23
5.3.2 Transmit Power ............................................................................................................................................................... 24
5.3.3 RSSI Trip ........................................................................................................................................................................ 24
5.3.4 Channel Selection ........................................................................................................................................................... 24
5.3.5 Retries ............................................................................................................................................................................. 24
5.4 Network Architecture .............................................................................................................................................................. 25
5.4.1 Network Topology .......................................................................................................................................................... 25
5.4.2 Network Address ............................................................................................................................................................ 27
5.4.3 Store-and-forward Repeater ............................................................................................................................................ 28
5.5 Routing ................................................................................................................................................................................... 28
5.5.1 Network Structure ........................................................................................................................................................... 28
5.5.2 Routing Table ................................................................................................................................................................. 29
5.6 Diagnostics ............................................................................................................................................................................. 30
5.6.1 Data Quality .................................................................................................................................................................... 30