User's Manual

ION-B User Manual

TFLN

TFLN Positioning

• In case no ventilation system has

been installed, don’t insert more

than 8 TFLN modules into the sub-

rack.

• In case more than 8 TFLN modules

have to be housed in a TPRN sub-

rack, it’s advisable to install the TPRN

sub-rack inside a rack with forced

ventilation.

• Be careful to meet expected requirements for RF ports. An adjustable attenuator might

be necessary if the power coming from the BTS exceeds the required levels, to avoid

damaging the ION-B circuitry or an increase of spurious emissions.

TFLN Installation

The TFLN master optical TRX is housed in a TPRN sub-rack and its dimensions are 19” wide and

4HE high. A TFLN module is able to be accommodated in any of these 12 slots.

Note: In case a new TFLN module has to be installed in a still working Master Unit, switch off the

sub-rack before inserting the plug-in TFLN module.

Firstly, gently insert the TFLN into one of the 12 available slots, and lock the 4 screws on the

front corners.

Then, connect the UL and DL RF cable to the TFLN UL and DL ports, respectively.

Use an appropriate torque wrench to ﬁ x these RF cables to DL and UL ports.

Remove the caps from TFLN optical ports and connect the SC-APC ﬁ bre optic cables to the

ports.

UL and DL cables coming from the same Remote Unit have to be connected to the UL and DL

ports marked by the same number on the TFLN front panel.

As you switch on the system, carefully refer to the TFLN Start-Up section.

Remember that Remote Units should be switched on before the Master Unit in order to follow

the correct Start-Up procedure.

Fig 4.3.6:

Visual alarms on the TFLN Master Optical Transceiver.