4. Commissioning
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MF0150A3A.doc Manual for ION-M7P/17EHP
After loosening the hex nut, connect the earth-bonding cable between the two
washers as illustrated in the above. Then, fasten all parts again with the hex nut.
Note:
Ground of a second unit (for example RU + EU) has to be connected to
the same equipotential bonding terminal as the Remote Unit. Use bonding
cables of the same length, as short as possible and with a large wire cross
section. Follow local electrical code practices.
4.2.5. Connection
of
the Antenna Cables
The Remote Unit has N-type antenna connector. Please refer to section
4.2.3
for its
location. Refer to the corresponding documentation of the connector manufacturer for
mounting the cable connectors.
The bending radius of the antenna cables must remain within the given
specifications.
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 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
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 RU.
figure 4-7 Torque wrench for tightening
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.
