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5.1.3 BIU/RFinterface
TheBIUcanbeconnectedwithaBi‐DirectionalAmplifierorBaseStationTranceiver.
ToconnecttheBIUwithaBDA,youneedtouseaduplexeroracirculatortoseparateTX/RXsignals
fromeachother.
TheBIUcanfeedexternalTX/RXsignalsfromtheBackPlane.
Using a dualbandMDBU, the BIU can easilyaccomodateallfrequency bands.Asseen in thetable
below, the MDBU is divided into Single and Dual Bandmodules and eachunit can be connected
with two carrier signals per band. At the rear of the MDBU, 4 ports represent the inputs for the
frequencybands.Thefollowingtableshowssignalstobefedtocorrespondingports:
In/outRFPort
No Unitnaming
Description
TX RX
Port#1 1900PTX(1930~1995MHz) 1900PRX(1850~1915MHz)
Port#2 1900PTX(1930~1995MHz) 1900PRX(1850~1915MHz)
Port#3 850CTX(869~894MHz) 850CRX(824~849MHz)
1
1900P+850C
MDBU
DualBand
1900P:2Port
850C:2Port
Port#4 850CTX(869~894MHz) 850CRX(824~849MHz)
Port#1 700LTETX(728~756MHz)
700LTE RX(698~716MHz,
777~787MHz)
Port#2 700LTETX(728~756MHz)
700LTE RX(698~716MHz,
777~787MHz)
Port#3 AWS‐1TX(2110~2155MHz) AWS‐1RX(1710~1755MHz)
2
700LTE+AWS‐1
MDBU
DualBand
700LTE:2Port
AWS‐1:2Port
Port#4 AWS‐1TX(2110~2155MHz) AWS‐1RX(1710~1755MHz)
Port#1 1900PTX(1930~1995MHz) 1900PRX(1850~1915MHz)
3
1900P
MDBU
SingleBand
1900P:2Port
Port#2 1900PTX(1930~1995MHz) 1900PRX(1850~1915MHz)
Port#1 900ITX(935~940MHz) 900IRX(896~901MHz)
Port#2 900ITX(925~940MHz) 900IRX(896~901MHz)
Port#3 800PSTX(851~869MHz) 800PSRX(806~869MHz)
4
900I+800I
MDBU
DualBand
900I:2Port
800I:2Port
Port#4 800PSTX(851~869MHz) 800PSRX(806~869MHz)
Port#1 1900PTX(1930~1995MHz) 1900PRX(1850~1915MHz)
Port#2 1900PTX(1930~1995MHz) 1900PRX(1850~1915MHz)
Port#3 AWS‐1TX(2110~2155MHz) AWS‐1RX(1710~1755MHz)
5
1900P+AWS‐1
MDBU
DualBand
1900P:2Port
AWS‐1:2Port
Port#4 AWS‐1TX(2110~2155MHz) AWS‐1RX(1710~1755MHz)
6 700PS+800PS DualBand Port#1 700PSTX(763~775MHz) 700PSRX(793~805MHz)
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