Afar AR24027, Руководство оператора

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AR24027 Operator’s Manual
3-4
3.2.2 Earth Grounding
For an outdoor installation you must provide a solid ground connection between the AR24027 metal
enclosure and the Earth ground. This will minimize possible damage due to static buildup or nearby
lightning.
In locations where it is warranted, you may also want to install a lightning arrestor device at the N
type connector of the radio leading to the antenna (Afar part no SUP-0201). This is particularly
recommended if the coaxial cable between the radio and antenna is of considerable length (greater
than 2 meters or 6 ft). If you install the lightning arrestor, follow these same directions but connect
the grounding cable to the appropriate screw/lug of the arrestor rather than the radio.
Each radio is shipped with a small ground lug (part no. SLU-35), and a lock washer to facilitate the
installation of the ground connection.
You will require some additional supplies that are easily found at a hardware store, namely:
•
AWG #6 copper grounding cable (4.1 mm diameter).
•
Grounding lug, nut, bolt, lock washer (as required) for attaching the cable to the metal
tower or structure.
•
Anti oxidizing paste
•
Outdoor cable ties (as required)
The following steps describe a procedure for a proper Earth ground connection:
1. Select an adequate grounding point on the tower or structure near the radio. This point should be
below the unit and must not be inside the building. If you must drill a hole make sure it is NOT
in the tower supports or cross braces. If several outdoor units are installed in the same area you
may use the same grounding point.
2. Apply a thin film of anti oxidizing paste to both sides of the supplied grounding lug blade, as well
as the threads of the screw used to secure the lug.
3. Install this grounding lug onto the radio enclosure with one of the two screws used to secure the
mounting plate. This screw must go through (i) the lock washer, (ii) the grounding lug blade, (iii)
the radio mounting plate and finally into the enclosure, in that order. Insure that the cable
connector of the grounding lug is pointing downward.
4. Prepare the grounding cable by stripping an adequate amount of insulation from both ends and
apply anti oxidizing paste to the exposed copper.
5. Insert one end of the exposed cable into the radio ground lug and tighten the screw on the lug.
6. Use steel wool or sand paper to clean the grounding point on the metal tower or structure.
7. Apply a thin film of anti oxidizing paste to this grounding point surface.
8. Fasten the cable to the grounding point using a lug, bolt and nut as required.