User Manual

123
MN024-08
TPRN Start-up
Before switching on the TPRN sub-rack, make sure that:
all expected modules have been inserted
the modules have been connected each other by RF jumpers, according
to what has been planned during system design
every TFLN contained in the Master Unit has been connected to its TFAx
remote units
each TFAx remote unit has been connected to its coverage antennas
the remote supervision unit (if present) has been connected/housed
to/into the Master Unit
different sub-racks have been connected each other via bus RS485 and
each of them have different addresses
the rack housing the TPRN is large enough to leave a minimum
distance of 1HE between contiguous TPRN sub-racks
Remember that TFAx remote units have to be switched on before relevant
Master Unit.
Once the TPRN sub-rack has been switched on, the system behaviour can be
summarized as per the following steps:
About 10sec after the TPRN sub-rack has been switched on, all TFLN
modules housed in the TPRN itself begin a “discovery” phase in order
to identify and collect status of the connected TFAx remote units.
While the discovery phase is working (max. 4min. depending on the
system complexity) each TFLN general alarm (i.e., LED “┌┘”) blinks,
whereas the other TFLN LEDs go on showing the detected status.
Do not connect/disconnect any cable or piece of equipment until all
TFLN modules have finished the discovery phase. This may result in
failing the identification of TFAx. Anyway during the discovery phase,
the whole system still works correctly as discovery process aims to
collect information about TFAx but without affecting basic system
functionalities.
TPRN
Fig. 5.8(c) : Power supply and
ground terminals on the rear
side of the TPRN subrack
Power
supply
Ground
terminal