User's Manual Part 1

Case B Remote Unit and TFAN20

These Remote Units are provided with external power supply both for the 220VAC option and for the

-48VDC option. As shown in the figure below different power supply are provided for the different

versions each one providing to the remote units the +5VDC power supply through a 3 poles

connector:

Warnings (to be read before remote units are installed)

Dealing with optical output ports

The TFAxxx remote unit contains semiconductor lasers. Invisible laser beams may be emitted from

the optical output ports. Do not look towards the optical ports while equipment is switched on.

Choosing a proper installation site for the remote units

1. TFAxxx Remote Units are to be installed as close as possible to the radiating antennas, in order to

minimize coaxial cable length, thus reducing the downlink power losses and the uplink noise

figure.

• When positioning the TFAxxx remote unit, consider that the placing of the relating antennas

should be decided in order to minimize the Minimum Coupling Loss (MLC),

so as to avoid blocking

• The TFAxxx remote unit is intended to be fixed on walls, false ceilings or other flat vertical

surfaces (TKA installation kits are available, in order to provide a protective cover for TFAxxx

Remote Unit, while making the TFAxxx installation easier and faster).

Handling optical connections

• When inserting an optical connector, take care to handle it so smoothly that the optical fibre is not

damaged. Optical fibres are to be single-mode (SM) 9.5/125µm.

• Typically, Britecell Plus equipment is provided with SC-APC optical connectors (other

connectors may be provided on request). Inserting any other connectors will result in severe

damages.

• Do not force or stretch the fibre pigtail with radius of curvature less than 5 cm. See rightward

figure for optimal fibre cabling.

• Remove the adapter caps only just before making connections. Do not leave any SC-APC adapter

open, as they attract dirt. Unused optical connectors must always be covered with their caps.

-48Vdc Power Supply

Two versions are available providing

different currents:

 25W to be used for low powe

remote units and TFAN20

 30W to be used for medium powe

and tri-band remote units

220Vac Power Supply

Positive +5 VDC

Ground 0 V

User Manual