User's Manual

4. Commissioning
M0200A8C_uc_ION-U_H_7P_80-85P_17P_19P User’s Manual for ION
®
-U Page 27
4.3.5. Connection of the antenna cable
The Remote Unit has one 4.3-10 type antenna connector labeled “ANT”.
When attaching the antenna cable connector, it is recommended to refer to the
corresponding documentation of the connector manufacturer. The bending radius of
the antenna cable must remain within the given specifications.
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.
Notice: Use an appropriate torque wrench for the coupling torques:
- for N-type connectors (2 N-m / 20 in lb) with 13/16 in opening,
e. g. item no. 244379 available from the CommScope e-catalog
- for 7/16 DIN-type (25 N-m / 19 ft lb) with 1 ¼ in opening,
e. g. item no. 244377 available from the CommScope e-catalog
- for 4.3-10 type connectors (5 N-m, 44 in lb) with 22 mm (7/8) in
opening
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.
Attention: To minimize passive inter-modulation (PIM) distortion, attention has to 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 or dirt into the connector.
• Use protective caps for the connectors when not mounted.
• Before mounting clean the connectors with dry compressed air.
• Before mounting clean the mating surfaces of the connector with a lint-free
alcohol-drenched cloth on a wooden or non-metallic item.
• Attach and torque the connectors properly.
• Avoid metallic abrasion when mounting the connectors by only screwing the
connecting nut, but not turning the whole connector.
• Use a torque wrench to fasten the connector, see above.
• Clean the protective caps before mounting for antenna cable replacement.