GE Grid Solutions MDS Master Station - 6.5 LN Radio Modules; 6.6 Alarm and Alarm;Relay Modules; 8.0 TROUBLESHOOTING; 8.1 Interpreting Module LEDs

MDS 05-6399A01, Rev. F MDS™ Master Station 3
Technical Specifications ...................................................................................... 103
6.5 LN Radio Modules .................................................................................................. 105
LN Master Radio Module LED Indicators ........................................................... 105
Technical Specifications ...................................................................................... 106
6.6 Alarm and Alarm/Relay Modules ............................................................................ 109
Alarm Module LEDs ............................................................................................ 110
Alarm/Audio Interface .......................................................................................... 110
Alarm/Relay Toggle Switch (6847 Only) ............................................................. 111
Alarm/Relay RF Connections (6847 Only) ......................................................... 111
6.7 Duplexer Tray.......................................................................................................... 112
7.0 SPECIAL CONFIGURATIONS ........................................................................... 113
7.1 Migrating “A” Modem Networks .............................................................................. 113
Mitigation strategy for mixed SDx/x710 repeater networks using the “A” modem ..... 113
User Configuration 1: Non-CKEY Repeater Network Case ............................... 113
User Configuration 2: CKEY Repeater Network Case ....................................... 114
8.0 TROUBLESHOOTING ........................................................................................ 115
8.1 Interpreting Module LEDs ....................................................................................... 115
Normal Operation ................................................................................................ 115
Exception and Alarm States ................................................................................ 116
8.2 Redundant Units ..................................................................................................... 116
8.3 Technical Assistance .............................................................................................. 116
8.4 Replacing Modules ................................................................................................. 116
Power Supply Modules........................................................................................ 117
Peripheral Modules – including Platform Manager, Radio, Alarm, and Alarm
Relay Modules. .................................................................................................... 117
Hot Swap Redundant Modules ........................................................................... 118
Internal Duplexer Tray ......................................................................................... 119
400 MHz Notch-Type Duplexers ......................................................................... 119
Bandpass-Type Duplexers .................................................................................. 119
8.5 Testing and Removing an Internal Duplexer ......................................................... 120
Testing ................................................................................................................. 120
Removing the Internal Duplexer ......................................................................... 120
9.0 TECHNICAL REFERENCE DATA ..................................................................... 124
9.1 RF Propagation Planning ....................................................................................... 124
Fresnel Zone Clearance ...................................................................................... 124
Formulas for System Planning ............................................................................ 125
9.2 dBm-Volts-Watts Conversion Chart ....................................................................... 127
10.0 GLOSSARY OF TERMS & ABBREVIATIONS ................................................. 128