User's Manual

Confidential&Proprietary26/115 SC‐DAS
No. Unit Description Remark
1 MDBU
MainDriveBTSUnit
Amplify&adjustdownlinkRFsignal
Amplify&adjustuplinkRFsignal
Max4EA
2 MCDU
MainCom/DivUnit
Combine3EAdownlinksignalanddivide4EAsignaltoODU
Combine4EAuplinksignalanddivide3EAsignaltoMDBU
SupportVHF/UHFinterfaceport

3 MCPU
MainCentralProcessorUnit
Controlandmonitoringsystemstatus
ControlandmonitoringwithUSB(B)
Allowsaccesstoupper‐levelnetworkthroughGSMorEthernet

4 MPSU
MainPowerSupplyUnit
Inputpower:DC‐48V,Outputpower:9V,6V

5 M/B
MotherBoard
Providesignalinterfaceandpowerforeachunit
Providefourportsfordrycontactoutput
Providethreeportsforinput
ProvidetwoAuxportsforfutureusage

6 Shelf 19inch,5U

4.1.4 SubAssemblyDescription
1)MainDriveBTSUnit(MDBU)
MDBUdeliversTXsignalsfromtheBTSorBDAtorelateddevicesaswellasdeliversRXsignalsfrom
thesedevicestotheBTSorBDA.ThisunitalsomonitorsTXinputlevel.UsingtheinputAGCfunction,
itautomaticallyadjustsinputATTaccordingto
inputpower.ItalsohasanATTtoadjustRXgain.The
MDBUvariesperfrequencybandtoincludingthefollowing:
