User's Manual

Compact BTS Expansion Configuration (Indoor)
Jun 2004 1X SC480 BTS Hardware Installation, Optimization/ATP, and FRU E-1
DRAFT
Introduction
This appendix covers the indoor and outdoor version of the Compact
BTS Expansion configuration. This configuration is set up for only
using other Compact BTSes. Power and ground cabling is not shown.
Figure E-1 through Figure E-3 show expansion BTSes using two
cCLPAs.
Figure E-4 through Figure E-6 show expansion BTSes using one
cCLPA.
Expansion BTSes for 1.9 GHz, +27V A or B band circuit configurations
are not supported.
Materials Needed
The following materials are required to configure expansion BTSes.
S Interconnect cabling of varying lengths
S Various sized conduit (if used)
S Data cable for cCLPA (if used)
S Customer I/O cabling
External Combiner and
Directional Coupler
A combiner and directional coupler are required for some of the
configurations. The following are the recommended specifications for
the combiner and directional coupler.
Table E-1: Combiner and Directional Coupler Specifications
Item Specifications
Combiner
Connector: N–Type
Frequency Range: Up to 2 GHz
Insertion Loss: 3.5 dB maximum
Return Loss: 16 dB minimum
Average Input Power: 60 Watts minimum
Directional Coupler
Connector: N–Type
Frequency Range: 810 to 950 MHz
Coupling: 30 +/–1 dB
Directivity: 28 dB minimum
table continued on next page
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