User's Manual

Samsung CDMA BSS: Indoor BTS Installation Manual
25
BSS Version 4, Document V4D0001 release 0.5, Indoor BTS Installation Manual, release 2.0
Connecting the cables
Warning: The installation of cables into the rack must be done in a
specific order to avoid damage and electrical shock.
Note: Install power and signaling cables separately from main power
cables to prevent electronic induction. Leave a minimum gap of
152.4 mm (6 inches) between the data and the main power cables to
avoid spurious emissions.
Order of installation The order of cable installation and connection is as follows:
1 Rack grounding
2DC
3 Power-up testing
4T1
5GPS
6 Interrack signaling
7 Customer alarms
8 BBU/rectifier alarms
9RF
After each connection is made, label the cables and complete the
appropriate boxes in the Indoor BTS Installation Record.
Overview of the
external connections
The external connections on SBR1 are as follows:
Cable Origin BTS connection
Rack ground main grounding bar Top of rack/bottom of
rack
T1 Telco Junction Box T1/E1 (75W) Connector*
GPS GPS system GPS-A and GPS-B
connectors*
RF cables - main TX/RX RF antenna a , b, g-A connectors*
RF cables - diversity RX RF antenna a , b, g-B connectors*
BBU/rectifier alarms BBU/rectifiers BBU alarms connector
Customer alarms Customer demarcation
point
Alarm connector*
DC Battery Back-up DC noise filters, A
branch and B branch
Interrack signaling SBR2 and SBR3
*These connectors are provided on SBR1 only. Other connectors appear on all
racks in the BTS.