Andrew ION-B Series, User Manual

Page: 110 / 181

110 ION-B User Manual
TPRN
TPRN Start-up
Before switching on the TPRN sub-rack, make sure that:
• all necessary modules have been inserted
• the modules have been connected to each other by RF jumpers, according to what has
been planned during the system design
• each 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 or housed to the Master Unit
• different sub-racks have been connected to each other via bus RS485 and each of them
has 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 the relevant Master Unit.
Once the TPRN sub-rack has been switched on, the system behaviour can be summarized by
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 of the TFLN general alarms (i.e., LED “ ”)
blink, 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
fi nished the discovery phase. This may result in failing to identify the TFAx. Regardless,
during the discovery phase, the entire system continues to work correctly as the discovery
process aims to collect information about the TFAx but without affecting basic system
functionalities.
• Once the discovery has fi nished, the general alarms (i.e. the LED “ ”) on each TFLN
panel stop blinking and switch OFF (provided that the TFLN master optical TRX is not
affected by a general failure).