User Manual

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User Manual
• In a multi-sub-rack system, remember to assign to each sub-rack a proper
RS485 bus address before installing the modules (please refer to TPRN
section for further details).
TFLN positioning
• In case no ventilation system is installed, do not insert more than 8 TFLN
modules into a sub-rack.
•
In case more than 8 TFLN modules have to be housed into a TPRN sub-
rack, it’s advisable to install the TPRN sub-rack inside a rack with forced
ventilation.
•
Take care to meet expected requirements on RF ports. An adjustable
attenuator could be necessary when the power coming from the BTS
exceeds the required levels to avoid damages in Britecell Plus circuitry or
increase of spurious emissions.
TFLN installation
The TFLN master optical TRX is housed in a TPRN sub-rack and its dimensions
are 19” width and 4HE height. A TFLN module can 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 in 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 a specific torque wrench to fix these
RF cables to DL and UL ports.
TFLN
Fig. 5.1
2
: Screws to be fixed at the corners of the TFLN front side
Fig. 5.13: UL and DL RF cables are to be fixed by a torque wrench