User's Manual

4. Commissioning
M0200ABA_ION-U_EU_H_23_23 User’s Manual for ION
®
-U Page 29
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: The terminations on the antenna IN connectors (7-21 IN-MAIN and 7-21 IN-
MIMO) must not be removed if the ports are not used.
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
Extension 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.