CommScope ION-U EU L 17EP/17EP, Руководство пользователя

Страница: 42 / 66

4. Commissioning
Page 42 M0200AJA_ION-U_EU_L_17EP_17EP.docx
User’s Manual for ION
®
-U
4.2.6. Antenna connection
The Extension Unit has six 4.3-10 connectors. For mounting the cable connector, it is
recommended to refer to the corresponding documentation of the connector
manufacturer. The bending radius of the antenna cables must remain within the given
specifications.
The selection of cable and antenna is an important consideration. Choose the type of
cable best suited for the antenna. Consider that a cable with higher loss is less
expensive but 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 4.3-10 type connectors (5 N-m, 44 in lb) with 22mm (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 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.