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INSTALLATION GUIDE FOR RX-7W22, II2
2.3
EQUIPMENT CONSTITUTION
The typical PS BDA unit consists of the following components:
Master Digital Board and Slave Digital Board:
The MCU is used to monitor and control the operation of the
repeater. It also provides the communication interface for remote control and status indication. LED indicators
provide the operation status of the MCU.
Duplexer:
The DPX is located near the MT and DT terminals and permits the uplink and downlink signals to
share a common antenna.
700MHz /800MHz Digital Integrated Module and Power Amplifier
: Consists of the Power Conversion
module, RF module, digital process module and monitoring modules. The Power Conversion module converts
+28V DC voltage into +9VJK and +9VRF. +9VJK, +9VRF are supplied to the monitoring unit, and the RF unit
in the integrated module separately. The RF module amplifies and converts the RF signal to IF signal. The
Digital process module converts the IF signal into baseband signal via AD conversion and extraction, and
filtering. After that, the IF signal will be amplified and converted to an RF signal by the RF module for RF filtering
and amplification. The Monitoring module monitors and controls the system parameters and is the interface for
both remote monitoring and local commissioning.
Power Supply Unit (PSU):
The PSU converts the input voltage into a stable DC supply to provide power for
the internal functional modules.
