User Manual

MN021-01
Page 18 of 28
12. Installing and cabling
12.1. Power supply
The system is designed to be powered by standard telecom voltage –48VDC. The power
consumption is 12W for the TFAF. The supply connector part name is MOLEX 5569-03. A
connectorized jumper is shipped with each remote unit.
ü WARNING: The system is connected POSITIVE to GROUND. Grounding connections must be carefully managed
in order to avoid reverse polarity mistakes
Figure 14 DC Power Connections for Remote Unit TLAF
12.2. RF Ports
The RF port is a duplexed N-female connector. A DC loop mechanism is implemented to detect
a broken cable or a disconnected antenna. To perform this functionality a DC loop antenna
must be used. If the DC loop functionality cannot be used, follow the “store” procedure in the
TFLF to mask the DC loop alarm.
ü WARNING: If passive distribution is used after the remote unit, verify that passive splitters can be DC loop
enabled.
ü WARNING: Both RF ports are supplied with a DC current of 2mA(max) @5Volts.
Figure 15 Remote Unit TFAF RF Connectors
12.3. Optical fibres connection
Optical connectors need to have proper alignment and mechanical support. When inserting an
optical connector, take care to handle it carefully to avoid damage to the fibre. Remove the dust
cap only prior to making connections.
ü Do not force or stretch the fibre pigtail with curve radius less than 5 cm.
ü See Figure 16 for optimal fibre cabling.
Blue NEGATIVE –48VDC
Black GROUND 0V