User Manual

4. Commissioning
Page 20
MF0123A1A PSR 700/800 MHz
4.2.5. Connection of the Antenna Cables
The PSR has 4.3-10-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 4.3-10 type connectors (5 Nm, 44 in lb) with 22 mm (7/8) in opening,
e.g. item no. TW-4310
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, see above.
• Clean the protective caps before mounting for antenna cable replacement.
4.2.6. Cleaning Procedure for RF Cable Connectors
The figures in this chapter illustrate the cleaning procedure and do not show the actual
unit.
1. What is needed for the cleaning?
a. Isopropyl alcohol
b. Compressed air
c. Lint-free wipe
d. Cotton buds