INSTALLATION GUIDE FOR UHF DAS
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2
EQUIPMENT DESCRIPTION
2.1
SYSTEM DIAGRAM
Remark: Battery Backup Unit shown as above figure is only used as a reserved port
Figure 4: UHF PS DAS Functional Block Diagram
In the downlink path, the BTS signals are received by the donor antenna that is connected to the Master Unit. After the
duplexer, the signals are sent to the LNA module for pre-amplification and to the digital RF integrated module for digital
filtering and frequency conversion. Then the DL signals will be filtered via the duplexer, and then sent to the Expansion
Unit(s), the RF signal is converted into an optical signal and then distributed to the Remote Unit(s) to over optical fiber.
After amplification by the RU, the signals are transmitted at the MT port to the service antenna infrastructure.
In the uplink path, the mobile signals are received by the service antenna. After passing through the MT port duplexer,
the signals are sent to the LNA and the integrated module for digital filtering, then the UL signals will be sent to the
Expansion Unit(s), the RF signal is converted into an optical signal and then distributed to the Master Unit for filtering by
the duplexer and power amplification. Finally, the uplink signals are sent to the donor antenna for transmission back to
the BTS.
