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

Fixed

Attenuator