User Manual
MN021-01
Page 7 of 28
4.2. Services
The BriteCell™ Fast system operates at the following standards:
4.3. Functional description
The BriteCell™ Fast system is a fibre optic distribution system for wireless signals. It consists of
a donor unit (TFLF) feeding up to 4 remote units (TFAF) in a star topology. Each remote unit
directly feeds up to two coverage antennas. The connection between the BTS and BriteCell™
FAST system can either be direct or through a repeater via a duplexed N-connector.
Both donor and remote units are powered at –48VDC (telecom supply). Donor and remote units
shall be connected with pre-connectorized composite fibre optic cable (cable with twin optical
fibre and copper wire for remote supply).
The system installation doesn’t require any particular calculation or setting, making it a real
plug-and-play system. Some useful functionalities, software and hardware, simplifies diagnostic
and commissioning:
• Downlink optical power test point
• Uplink adjustable gain setting
• Link diagnostic by means of individual link LEDs
• Downlink ALC (Automatic Level Control)
• Optical AGC (Automatic Gain Control)
The following picture shows a simplified system block diagram
Figure 2 Britecell™ Fast System Block Diagram
SERVICE BANDWIDTH
Uplink [MHz] Downlink[MHz]
TRUNKING RADIO
806:824 851:869
AMPS 824:849 869:894
GSM 890:915 935:960
DCS 1710:1785 1805:1880
PCS 1850:1910 1930:1990
E-GSM 880:915 925:960
BTS
Local
Unit
Mixed fibre-copper cable
Unit
Remote
Unit
Mixed fibre-copper cable
Mixed fibre-copper cable
Mixed fibre-copper cable
Fixed
Attenuator