4. Commissioning
Page 24
Manual
MF0145AXA.doc
Manual for ION-M17P/19P Advanced
4.2.5. Connection
of
the Antenna Cables
The Remote Unit has a 4.3-10 antenna connector. Please refer to section
4.2.3
Connections
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 torque of the 4.3-10
type connector: 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 RU.
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.
Clean the protective caps before mounting for antenna cable replacement.
