General - Ericsson CME 20 R6.1 Reference Manual

Radio Configurations, RBS 2000 Micro
3.4

General

RBS Configurations is the designated expression for the RF parts
integrated in the BTS.
The functionality is:
•
The output signal from one or more transmitters are combined
into the same antenna system, which can be utilized as a TX/RX
antenna.
•
The received signal from the receive antenna system, which can
be utilized as a TX/RX antenna, is distributed to receivers
belonging to one RBS.
3.5 Configurations
3.5.1 TX Output Power
The value given for the RBS output power for the different
configurations below is the minimum RBS output power when the
transmitter is set for maximum nominal power (P0).
The RBS output power is measured at the TX reference point, and it is
dependent on the TX combining and filtering parts.
The tolerance for the RBS output power at the different settings is in
compliance with /GSM:05.05:4.1.2/ for GSM 900 and GSM 1800, and /
PCS:5.3.3/ for GSM 1900.
When two or more transmitters are combined to one antenna, the
transmitters must be operated with a minimum of 400 kHz separation
between the centre frequency of adjacent carriers. This limitation is not
caused by the combiner but the RBS itself.
With TX diversity configured both transmitters use the same ARFCN.
The maximum nominal power, P0, measured on the cabinet output RF
connector (which in this case corresponds to the TX Reference Point) is
minimum +32 dBm. This output power level is valid for all frequency
bands.
With TX diversity configured the output power is minimum +32 dBm at
each ARP.
Nominal A-bis configuration power parameters for the Micro Base
Station RBS 2301:
900 MHz
1800 MHz
1900 MHz
Note:
TX diversity configuration power parameters for the Micro Base Station
RBS 2301:
24 (306)
21 - 33 (dec)
21 - 33 (dec)
21 - 33 (dec)
Only steps by 2 is configureable (from the highest value).
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EN/LZT 123 2697 R5A
1998-08-13