User Manual

23
MN024-08
3.1. Introduction
Main tasks of the TFAx unit:
Downlink (DL):
¾ Optical-to-RF conversion of the input optical
signal
¾ Automatic Gain Control (AGC) of each converted signal, in order to
compensate optical losses;
¾ RF amplification: the converted RF signal is boosted in order to maintain a
good signal-to-noise ratio
¾ RF filtering: a proper filter rejects the spurious emissions
¾ RF duplexing and splitting: the boosted RF signal is conveyed to 2 antenna
ports
Uplink (UL):
¾ RF amplification: a low noise amplifier boosts the signal received from
antennas so as to maintain a good signal-to-noise ratio
¾ RF filtering: the boosted signal is cleaned from the spurious emissions
¾ Automatic Level Control (ALC): the RF signal level is adjusted according to
blocking requirements
¾ RF-to-optical conversion of the signal, which is finally conveyed to the
output optical port
Different types of Case-A remote units
In order to allow radio coverages with different power and band requirements,
Britecell architecture provides a wide variety of remote units. This allows the
customer to choose the solution which best fits its coverage and
environmental demands.
TFAx
(intro)
Figure 3.1: The
four different
case of the
Britecell Plus
remote unit
Module name:
Remote Unit
TFAx
(TFAN,TFAM,TFAH)
Case B remote unit
Case A remote unit
Case L remote unit
Case F remote unit