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BTS architectures and interoperability
GSM900 5/5 configuration using two cabinets
In this configuration, there are no split cells, and therefore no uplink or downlink
connections between the cabinets. In the M-Cell 6 cabinet, both 3IP CBFs are
configured with external loads provided by the NON HYB. In the Horizon macro,
one DDF has two direct RF inputs, plus a third input via the FEEDTHRU. The
second DDF has two RF inputs, one direct and one via the FEEDTHRU. This
arrangement facilitates using the transceivers in sequence. The two 50 ohm
loads are required to terminate the unused DDF/3IP CBF input ports.
50 ohm loads
Inst. 6–12
Sector 2
2B 1B 0B 2A 1A 0A B
DDF2
FEEDTHRU
Horizon macro
Figure 6-10 GSM900 mixed Horizon macro / M-Cell 6 5/5 configuration using
Installation & Configuration: Horizon macro outdoor
68P02902W03-A
CONTROLLED INTRODUCTION
A
EXT
DDF1
3IP CBF2
two cabinets
GSM-204-423
Sector 1
Ç Ç Ç
Ç Ç Ç
Ç Ç Ç
NON-HYB
3IP CBF1
M-Cell 6
31st Oct 01
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