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with the original system. For more information refer to the appropriate section below for the
specific Radio Module.
Technical Specifications
The following are the key operating specifications for the SD Master Station 900MHz and
400MHz variants, as well as LN Master station. Items are separated into Transmit (TX) and
Receive (RX) categories. Ongoing product improvements may result in specification changes,
and GE MDS reserves the right to make such changes without obligation to any party. Should
you require an exact specification for the build of your unit, please contact the factory for
additional assistance.
Table 6-12. 900MHz SD Master Station Technical Specifications
Transmit (TX) Parameter
Frequency Range
Frequency Stability
TX Power Out
TX Frequency Response
Agency Approvals
Load VSWR
Power Consumption
Receive (RX) Parameter
Frequency Range
RX Intermodulation
RX Adjacent Channel
RX Spurious and Image
RX Baseband Amplitude
RSSI Accuracy
RX High RF Input Level
RX Baseband Frequency Response
Power Consumption
Noise Figure
Blocking
Operating Range
1
Additional frequency bands under development
2
-30°C to +50°C when operating continuously keyed (CKEY)
MDS 05-6399A01, Rev. F
Specification
928-960 MHz (SDM9C, SDM9K)
<0.5 ppm, -30°C to +60°C
+40.25 dBm +/-0.85dB at radio card for -30°C to +60° C
+37 dBm +1.85/-0.85 dB at back of chassis -30°C to +60°C
+/- 1.0 dB from 100 Hz to 2.5 kHz
FCC Part 24D
FCC Part 101C
IC RSS 119
10:1 Max, All angles, No damage
<80W for all DC and AC versions, 100% TX Duty Cycle
Specification
928-960 MHz (SDM9C), 880-915 MHz (SDM9K)
>60 dB
>60 dB
>60 dB when operating with integrated bandpass duplexer
225 < Audio Level <275 mV RMS, -50 dBm @ 1 kHz
+/-3 dB for RSSI -110 to -70 dBm
10 dBm, no damage
+/- 1.0 dB from 100 Hz to 2.5 kHz
<30W for all DC and AC versions, transmitter disabled
<6 dB
>60 dB
-30°C to +60°C
MDS™ Master Station
1
1
1
103
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