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BTS architectures and interoperability
GSM900
Refer to Figure 6-5. In GSM900 products, RF gain for the IADU and SURF is
configurable. A split cell configuration is therefore dealt with in the same way as
that described for DCS1800, except that the 13 dB attennuators are not
required. Instead, the required signal level is maintained by using appropriate
gain settings for the IADU and SURF.
Inst. 6–6
Cell A
Rx
Rx
Rx
div
Duplexer
SURF
*
Rx
CTU
Horizon macro (Extender)
Figure 6-5 Functional overview of the receive path for a GSM900 split cell
Installation & Configuration: Horizon macro outdoor
68P02902W03-A
CONTROLLED INTRODUCTION
Cell B
Rx
Rx
div
IADU
*
Rx
Rx
Rx
div
FMUX
FMUX
Fibre
optic
link
* Configurable gain
configuration
GSM-204-423
Cell C
Rx
Rx
div
div
Duplexer
DLNB
Rx
div
TCU
FOX
MCU
To NIU and Abis
Interface
M-Cell 6 (Master)
31st Oct 01
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