Andrew Wireless Innovations Group BCEL-800-900 External Photos
BRITECELL System Manual MN010-04 June 2003 Page 27 of 78
The company has a policy of continuous product development and improvement and we therefore
reserve the right to vary any information quoted without prior notice.
14. Introduction
This section describes the TFA (Remote Unit).
The TFA is part of the Britecell system and provides O/E downlink conversion and
E/O uplink conversion.
The TFA is connected to passive antennas, which transmit and receive from and to
the mobiles.
Each TFA is connected to a TFL through two optical fibres.
This forms a star configuration. One fibre is dedicated to the reception of the
downlink signals that the TFA receives from TFL, and re-transmits to mobile
stations. The other fibre supports the transmission of uplink signals, which each
TFA gathers from the mobiles operating in its coverage area, to the TFL.
TFA can feed antennas through two external RF ports, except UMTS TFA where a
TFA gathers from the mobiles operating in its coverage area, to the TFL.
TFA can feed antennas through two external RF ports, except UMTS TFA where a
single RF TRx port is provided.
15. Part description
Fig. 14 – TFA Remote Unit part description
Power supply
RF TRx port
DL opt. port
UL opt. port
RX TRx port
External alarm
Green LED = power on
Red LED = alarm
Red LED = alarm