Huawei AAU3902 Hardware Description page 22

AAU3902
Hardware Description
Figure 2-8 RCU internal control
The following figure shows the logical structure of RCU external control.
Figure 2-9 RCU external control
There are three arrays in an AAU, including active high-frequency AU array, passive low-
frequency AU array, and passive high-frequency AU array. The RCU RET has the following
characteristics:
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l
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RCU Serial Numbers on an AAU
The following figure shows the positions and silkscreens of the three RCU serial numbers on
an AAU.
Issue 06 (2014-07-30)
The three AU arrays are independently controlled by the RCU.
The active high-frequency AU array supports only internal control mode.
The two passive AU arrays support both internal and external control modes.
In external control mode, the RET port does not support OOK signals. Therefore, if OOK
signals are transmitted, an SBT must be installed to separate OOK signals from the
combined signals and convert the OOK signals to RS485 signals.
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2 AAU Introduction
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