Functions - Ericsson CME 20 R6.1 Reference Manual

Radio Transmission
Combining System and Filtering, is the interface between transmitters
and the antenna system. The functionality is:
- Antenna system supervision support
- RF filtering
- Duplex filtering
The TX reference point is defined as the point where the TX antenna
signal crosses the RBS border, i.e. the connector for the antenna feeder.
Figure 35
When the RBS is configured with integral antenna the TX reference
point is the cabinet output RF connector.
Figure 36
20.3

Functions

20.3.1 Radio Transmission
Radio transmission denotes the function to "Generate an RF signal"
from the bit stream that constitutes a burst.
The transmitter uses the modulation format specified in /GSM:05.04/ for
GSM 900 and GSM 1800, and /PCS:4/ for GSM 1900.
The RF transmission characteristics are in compliance with
requirements in /GSM:05.05/ for GSM 900 and GSM 1800, and /
PCS:5/ for GSM 1900.
136 (306)
RBS Border
Cabinet
TX
TX
TX reference point
RBS Border
Cabinet
TX
TX
TX reference point with integral antenna
© Ericsson Radio Systems AB
— All Rights Reserved —
Combining
system
+
Filtering
X=TX ref. point
Combining
system
+
Filtering
X=TX ref. point
EN/LZT 123 2697
P003052A
P003053A
R5A
1998-08-13