Users Manual

MDS 05-6399A01, Rev. G MDS™ Master Station 3
Technical Specifications ................................................................................... 108
6.5 LN Radio Modules ............................................................................................... 110
LN Master Radio Module LED Indicators ......................................................... 110
Technical Specifications ................................................................................... 111
6.6 Alarm and Alarm/Relay Modules ......................................................................... 115
Alarm Module LEDs .......................................................................................... 117
Alarm/Audio Interface ....................................................................................... 117
Alarm/Relay Toggle Switch (6847 Only) ........................................................... 118
Alarm/Relay RF Connections (6847 Only) ........................................................ 118
6.7 Duplexer Tray ...................................................................................................... 119
7.0 SPECIAL CONFIGURATIONS ........................................................................ 120
7.1 Migrating “A” Modem Networks ........................................................................... 120
Mitigation strategy for mixed SDx/x710 repeater networks using the “A” modem ..... 120
User Configuration 1: Non-CKEY Repeater Network Case .............................. 120
User Configuration 2: CKEY Repeater Network Case ...................................... 121
8.0 TROUBLESHOOTING ..................................................................................... 122
8.1 Interpreting Module LEDs .................................................................................... 122
Normal Operation ............................................................................................. 122
Exception and Alarm States ............................................................................. 123
8.2 Redundant Units .................................................................................................. 123
8.3 Technical Assistance ........................................................................................... 124
8.4 Replacing Modules .............................................................................................. 124
Power Supply Modules ..................................................................................... 124
Peripheral Modules – including Platform Manager, Radio, Alarm, and Alarm
Relay Modules. ................................................................................................. 125
Hot Swap Redundant Modules ......................................................................... 125
Internal Duplexer Tray ...................................................................................... 126
400 MHz Notch-Type Duplexers ....................................................................... 126
Bandpass-Type Duplexers ............................................................................... 127
8.5 Testing and Removing an Internal Duplexer ........................................................ 127
Testing .............................................................................................................. 127
Removing the Internal Duplexer ....................................................................... 127
9.0 TECHNICAL REFERENCE DATA ................................................................... 131
9.1 RF Propagation Planning ..................................................................................... 131
Fresnel Zone Clearance ................................................................................... 131
Formulas for System Planning.......................................................................... 132
9.2 dBm-Volts-Watts Conversion Chart ..................................................................... 134
10.0 GLOSSARY OF TERMS & ABBREVIATIONS ................................................ 135