User's Manual

Confidential & Proprietary 10/21
Section2
System configuration and Functions
2.1 eROU (edge Remote Optic Unit) & eROUa
eROU receives TX optical signals from eHUB and converts them into RF signals. The converted RF signal is
radiated to the antenna port via the AMP and Multiplexer. When receiving RX signals through the antenna
port, this unit filters out-of-band signals in a corresponding Multiplexer and sends the results to OPTIC to
make electronic-optical conversion of them. After converted, the signals are sent to a upper device of
eHUB.
For this application, eROUa receives RF signals from eROU. The received RF signals are radiated through
the AMP and multiplexer to the antenna ports. When the device receives an RX signal through the
antenna port, it filters out-of-band signals from the appropriate multiplexer and transmits the results
to the RF signal. The signal is transmitted to the upper unit of the eHUB.
In addition, if band extension is required, another eROU can be added up to three using optical splitters
and RF ports.
However, the band expansion equipment will be developed in the future.
And eROU is divided into an Internal product with an antenna and an External product without an antenna.
Figure 1. eROU Configuration Diagram
CASCADE_KIT
eROU
cROU
aROU
aROU
External PSU
External PSU