Andrew ION-B Series, User Manual

Page: 130 / 181

130 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.