102 MDS™ Master Station MDS 05-6399A01, Rev. F
6.4 SD Radio Modules
Figure 6-7. SD Radio Module
The SD Master Radio Modules are field replaceable, hot swappable, full duplex radios offering
narrowband communications. Current offerings include variants that span 800-960MHz.
Master station Radio modules are field replaceable and hot
swappable. Refer to Section 8.4 Replacing Modules for information on removal and
installation.
When installing Radio Modules, torque thumbscrews to 10 in-lbs,
or approximately ¼ turn past hand tight, to insure optimum heat
transfer through thermal contact connector on the rear of the unit.
SD Master Radio Module LED Indicators
The SD Radio Modules have bi-color green/red LEDs to indicate power, alarm, and
active/standby status as shown in the table below. Blue LEDs to indicate receiver transmit and
receive are also provided.
Table 6-11. SD Radio Module LEDs
SD Master Radio Module RF Interface
SD Radio Modules include keyed RF Connectors for front connection to either an Alarm/Relay
Module, if used in a redundant system, or to the front of the duplexer tray if used in a non-
redundant system. Different cables are used in each case. Systems assembled by the factory
come pre-wired using the appropriate cabling. If replacing a module, use the cables provided
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