User's Manual

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This chapter describes operation of SMDR-NH124. It deals with procedures and operations for
normal system operation after installation. It also describes operations per unit and interworking
methods.
6.1 BIU Operation
6.1.1 BIU
6.1.2 TX Operation at BIU
TX level to be sent to BIU should be in the range of -20dBm ~ + 10dBm. If the level exceeds the
range, you need to connect an attenuator with the front end of BIU input and adjust the level in
the corresponding range. Out of the range, maximal power cannot be outputted and so you
need to increase output power of BDA or adjust attenuation amount of BTS’s coupler or ATT to
adjust the level.
For signals of all bands, you need to check, using spectrum, if they are in an appropriate level
before making connection with input port of BIU and then check if there are spurious signals.
You need MDBU of a band you want to use. Insert the unit into BIU and check if it works
normally. For MDBU, up to two TX inputs are provided. Input level per port is -20dBm~+10dBm.
The following describe settings for 800MHz Public safety MDBU.