EQUIPMENT MANUAL FOR RD-9120
RD-9120 QE
Copyright - refer to title page
Page 12
ENU Status : 1-0-0
1 GENERAL INFORMATION
The RD-9120 outdoor bandwidth adjustable repeater is designed for outdoor operation in the GSM900
band. Band-specific linear amplifier and filtering effectively amplifies the desired BTS carrier and provides
superior out-of-band rejection. Typical units incorporate up to 24.6MHz filter bandwidth with frequencies
programmed to specific requirements of the network.
Remote configuration and surveillance is possible through Comba’s remote control and monitoring system,
via PC or wireless modem to the OMC. Li-ion backup battery built in enclosure ensures alarm signals are
sent out while power is down.The RD-9120 comes in a sealed, cast aluminum chassis, suitable for all
weather conditions.
Main features of RD-9120:
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Bandwidth adjustable from 2 to 24.6MHz.
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Automatic control for self-oscillation caused by a low isolation between DT and MT antennas.
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Integrated GSM wireless modem for remote configuration, monitoring and control.
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Internal backup battery keeps the alarm unit running for up to three hours after power failure.
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Optional OMC is available for remote operation and maintenance of repeaters.
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Designed for all weather outdoor installation– waterproof, damp-proof and omni-sealed (IP65).
The RD-9120 has the following variants:
Part Number
Total Output Power
RD9120-02V25P30G25A22M01
30 dBm (1W)
RD9120-02V25P33G25A22M01
33 dBm (2W)
RD9120-02V25P40G25A22M01
40 dBm (10W)
Table 1: RD-9120 variants
In this manual, we will use the OMT screenshot of the variant having 40 output power per channel as an
example to introduce the commissioning and monitoring functions.
