INSTALLATION GUIDE FOR SR-1910
SR-1910 QI
Copyright - refer to title page
Page 17
ENU Status : 1-1-1
2.4 EQUIPMENT CONSTITUTION
The typical SR-1910 unit consists of the following components:
Integrated Duplexer (DPX):
The DPX is located towards the DT and MT terminals and permits the uplink
and downlink signals to share a common antenna. The DL DPX is integrated with function of DL LNA to
pre-amplify signals; the UL DPX is integrated with functions of UL LNA.
•
Low Noise Amplifier (LNA): With ATT function, it is installed at the front end of the UL and DL
branches. The use of LNAs provides better sensitivity to the repeater.
RF Integrated Module:
Combines of Distribution Board, UL/DL FS module and UL/DL PA module.
•
Frequency Selection Module (FS): IF SAW filtered and
is
used to select the required band and
effectively reject the undesired signals.
•
Power Amplifier Module (PA): With the ATT and ALC functions, it fulfils power amplification in
both UL and DL branches.
•
Distribution Board: It provides connectivity to the functional modules and connection between
the MCU and the LEDs located on the enclosure bottom.
Power Supply Unit (PSU):
The PSU converts the input voltage into a stable DC to provide power for the
internal functional modules and to charge the internal Li-ion battery.
Wireless Modem:
The wireless has connections for RF, data and power. On the wireless modem, there is
an indicator LED to show the modem status. The wireless modem is used for remote control and monitors,
and for alarm transmission from the equipment back to the OMC.
Li-ion Battery:
The Li-ion battery provides back-up supply to the MCU to send out alarm signals in the
event of mains failure.
Main Control Unit (MCU):
The MCU is used to monitor and control the operation of the repeater. It also
provides the communication interface for remote control and indication. LED indicators provide the
operation status of the MCU.
End of section
