User's Manual

Confidential & Proprietary 68/139
For each port, TX signals and RX signals are separated from each other. You don't have to
terminate unused ports unless you want to.
BIU interface with Base station Transceiver
Basically, BIU has different TX and RX ports, and so, you have only to connect input
and output ports.
Through spectrum, you need to check signals sent from BTS TX. If the signals exceed
input range (-20dBm~+10dBm), you can connect an attenuator ahead of the input port
to put the signals in the input range.
BIU interface with Bi-Directional Amplifier
Basically, BIU is in Simplexer type; when you use BDA, you need to separate BDA
signals from TX and RX type.
Using a duplexer or a circulator, you can separate TX/RX signals of an external device