User's Manual

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Given the TX input range (-20dBm~+10dBm/Total per port), make sure to see if the
value is in the input range, using Spectrum Analyzer, when you connect input ports.
5.1.4 MDBU insertion
MDBU is designed to let a MDBU be inserted into any slot.
BIU can be equipped with a total of four MDBUs. If only one MDBU is inserted into a
slot with the other slots reserved, you need to insert BLANK cards into the other slots.