User's Manual

SystemDescription
12
Figure 7 BIU Interfaces
BIU
ALM
ON
DL/UL BTS 1
TP UL 1
EXTERNAL
ALARM
TP UL 2
DL OUT 1
UL IN 1
DL OUT 2
UL IN 2
DL/UL BTS 2


BIU
ALM
ON
DL/UL BTS 1
TP UL 1
TP UL 2
DL OUT 1
UL IN 1
DL OUT 2
UL IN 2
DL/UL BTS 2


Item Description
Connectionfrom
theradiobasestation(RBS).
Testportforth
euplinkoftheDL/ULBTSport‐6dB.Thesignalwillbe3dBm
belowtheDL/ULBTSport.PortisnotvalidonthesimplexBIU.
Simplexdownlinkfe
edtotheFOI.
Simplexuplinkfr
omtheFOI.TheBIUwillattenuateand/oramplifythesignal
andthenroutetotheDL/ULBTSport.
Usedforex
ternalalarmmonitoring(DBI3xx,twoslotversiononly).
TheLEDsindicateva
riousstates,see Table7 .
DL/ULBTS1/2
TPUL1/2
DLOUT1/
2
ULIN1/2
EXTE
RNALALARMS
ON
/ALMLED