Huawei RTN XMC ODU Product Description page 18

RTN XMC ODU
Product Description
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Issue Draft A (2013-12-20)
Processing of the received signals
1. The duplexer isolation unit separates the RF input signals from other signals received
by the antenna.
2. The RF signals are amplified through the Low Noise Amplifier (LNA) unit.
3. The amplified RF signals are down-converted, filtered, and amplified to 140 MHz IF
RX signals and transmitted to the multiplexer unit.
4. The multiplexer unit combines the IF RX signals and O&M downlink signals and then
transmits the combined signals to the IDU through IF cable.
The CTRL unit performs the ASK modulation on the O&M downlink signals to generate
10 MHz signals. The modulated signals are transmitted to the multiplexer unit. The CTRL
unit provides the RSSI interface and monitors the RX level through the RSSI circuit.
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3 Product Structure
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