EXPRESS DAS
Installation and Operations Manual
26
EXPRESS DAS Installation and Operations Manual – Version 2.2 November 2013
4
Optical Distribution Unit (ODU)
The ODU contains an internal optical transmitter and receiver allowing it to perform RF and optical signal
conversions. The ODU receives incoming downlink RF signals from the BIU and converts them into
optical signals. It then sends the optical signals to remote MRUs/ARUs through fiber optic cables. For the
reverse path, the ODU converts optical signals received from the MRUs/ARUs to RF signals attenuated
at -20dbm and sends them to the BIU.
The following block diagram shows the ODU’s primary components, functions,
inputs and outputs.
Figure 4
.
1 – ODU Block Diagram
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