GE MDS iNET 900, Справочное руководство

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05-2806A01, Rev. J iNET Series Reference Manual 125
4
PLANNING A RADIO
NETWORK
4 Chapter Counter Reset Paragraph
Contents
4.1 INSTALLATION PLANNING ..................................................127
4.1.1 General Requirements ...................................................................... 127
DIN Rail Mounting Option ...................................................................... 129
4.1.2 Site Selection ..................................................................................... 129
4.1.3 Equipment Grounding ....................................................................... 130
4.1.4 Terrain and Signal Strength ............................................................... 130
4.1.5 Antenna & Feedline Selection ........................................................... 131
4.1.6 How Much Output Power Can be Used? .......................................... 133
4.1.7 Conducting a Site Survey .................................................................. 134
4.1.8 A Word About Radio Interference ...................................................... 134
4.1.9 Notes on Using 28 VDC Power Supplies .......................................... 136
4.2 RADIO (RF) MEASUREMENTS............................................137
4.2.1 Antenna System SWR and Transmitter Power Output ...................... 137
Introduction............................................................................................. 137
Procedure............................................................................................... 138
4.2.2 Antenna Aiming ................................................................................. 139
Introduction............................................................................................. 139
Procedure............................................................................................... 139
4.3 dBm-WATTS-VOLTS CONVERSION CHART.......................141
4.4 PERFORMANCE NOTES .....................................................142
4.4.1 Wireless Bridge ................................................................................. 142
4.4.2 Distance-Throughput Relationship .................................................... 142
4.4.3 Data Latency TCP versus UDP Mode ............................................ 143
4.4.4 Data Compression ............................................................................. 143
4.4.5 Packets-per-Second (PPS) ............................................................... 143
4.4.6 Station-to-Station Traffic .................................................................... 143
4.4.7 Interference has a Direct Correlation to Throughput ......................... 143
4.4.8 Maximizing Throughput ..................................................................... 144
4.4.9 Placing an iNET Radio Behind a Firewall .......................................... 145
4.5 SNMPv3 NOTES ...................................................................145
4.5.1 Overview ............................................................................................ 145
SNMPv3 Accounts.................................................................................. 146
Context Names....................................................................................... 146
Password-Mode Management Changes..............................................................147