CommScope Node AM4, Руководство пользователя

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3. Installation
MF0121ACP _uc.docx Manual for Node AM4 Page 27
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
- SMA connectors have a specified torque of 60 N-cm.
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.
3.2.6. Cleaning Procedure for RF Cable Connectors
The figures in this chapter illustrate the cleaning procedure and do not show an actual
Node AM.
1. What is needed for the cleaning?
a. Isopropyl alcohol
b. Compressed air
c. Lint-free wipe
d. Cotton buds
2. Remove protective cap from the RF
connector.