Sd Master Radio Module Rf Interface; Sdm9 Radio Module - 900Mhz; Sdm4 Radio Module - 400 Mhz - GE MDS Master Station Technical Manual

LED Name
PWR/ALARM
ACTIVE
TX
RX

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
with the original system. For more information refer to the appropriate section below for the spe-
cific Radio Module.
SDM9 Radio Module – 900MHz
The SDM9 is an SD Master Radio Module with several variants to accommodate different fre-
quency bands. Current offering is the SDM9C which supports 928-960MHz. Refer to the table
below for detailed information about this transceiver.
Table 6-12. 6846 SDM9 Radio Module Specifications
Frequency Band
Duplex Modes
Transmit Power
Receive Noise Figure
Adjacent Channel Rejection
Power Consumption
Antenna Connector

SDM4 Radio Module - 400 MHz

The SDM4 is an SD Radio Module with variants to accommodate different frequency bands.
Current offering includes the SDM4B which supports 400-450MHz and the SDM4C which sup-
ports 450-512MHz. Refer to the table above for detailed information about this transceiver.
86
Table 6-11. SD Radio Module LEDs
Behavior
GREEN
FLASHING RED
FLASHING GREEN
Alternating with ACTIVE
GREEN
OFF
Alternating with PWR
BLUE
BLUE
820-870MHz (Pending)
880-915MHz (Pending)
928-960MHz (SDM9C)
Full
Half Duplex, Switched Carrier
Half Duplex, Single Carrier (Simplex)
Half Duplex modes may operate using software enabled integrated
T/R switch for installations that do not require a duplexer.
+40dBm, Maximum. Software programmable from _+30 to +40dBm
in 1dB steps.
<6dB
60dB typical (EN300-113)
60W, Max, at full duplex with continuous transmit, +40dBm
Dual FAKRA-SMB
MDS™ Master Station
Meaning
Power applied
Alarmed radio
Radio power-up
Firmware is updating
Active
Standby
Firmware is updating
Transmitting
Receiving
MDS 05-6399A01, Rev. E