3 Commissioning
Page 32
User’s Manual for ION-U 7/8/85/17/19
The selection of cable and antenna is an important consideration. On the one hand, a
cable with higher loss is less expensive but, on the other hand, it impairs
performance.
Use an appropriate torque wrench for the coupling torque of N-type
connectors (2 N-m / 20 in lb), with 13/16 in opening to tighten the N-type
antenna connectors. For example, use torque wrench of item no. 244379
available from the
CommScope
e-catalog
. Do NOT use your hands or any
other tool (e.g. a pair of pliers)! This might cause damage to the
connector and lead to a malfunction of the Remote Unit.
To minimize passive inter-modulation (PIM) distortion, attention must be
paid to the physical condition of the connector junctions. Do not use
connectors that show signs of corrosion on the metal surface. Prevent
the ingress of water into the connector. Attach and torque the
connectors properly.
1. Route the antenna cable from the antenna or splitter to the base of the RU.
2. Cut the cable to length and terminate the cable with an N-type male connector.
3. Remove the red plastic protective cover from the N-type female connector.
4. Using an appropriate torque wrench, connect the cable to the antenna port of
the RU.
figure 3-14 N-type antenna connection
3.2.6. Expansion Ports Connections
The Expansion ports are QMA-F connectors that are used to connect to an
expansion unit to provide additional bands of coverage.
N-type antenna connector
Antenna cable
