Nortel DualMode 800, Maintenance Manual

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2-18 Periodic maintenance
411-2051-500 Draft 00.01 November 1999
18 Verify that the cables and clamps connecting the guy wires to the grounding system are
secure
19 Verify that transmission cables are grounded at both the top and bottom of the tower,
and the building entrance
20 Buildings with metal walls, roof or base, all metal parts are grounded
21 Site fence, fuel tank or other metal structures are grounded
22 Check that grounding cables and clamps are secure
Antennas and tower
23 Check the tower base for cracks, concrete break up and upheaval
24 Check all guy anchors for cracks or upheaval
25 Check guy tension and attachment
26 Check fasteners for security
27 Check all components for rust
28 Check for flaking paint (often a sign of over-stress)
29 Check the over-all condition of the paint; re-paint if necessary
30 Check that the transmission line is adequately supported and protected between the cell
site building and the antenna tower
31 When tower is climbed, check grounding on the higher parts
32 When tower is climbed, check the tower lights
33 When tower is climbed, perform structural inspection of antenna:
• Check for correct orientation and tilt
• Check for cracks, dents, burns
• Check for fasteners, attachment and security
• Check for transmission line and ground attachment security
• Check for audible gas leakage in pressurized system
Site performance
34 Confirm coverage by making calls from the fringe of the site coverage area
35 Confirm handoffs by driving across the cell boundaries with a call established
36 Perform an antenna sweep test
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