2-6
Periodic maintenance
411-2051-500
Draft
00.01
November 1999
Building sheath, fences and other equipment
If the site has metal walls, roof or base, the metal components must be
grounded. The cell site fence and any fuel tanks or other metal structures must
be grounded as well. Check that grounding cables and clamps are secure.
Antennas and tower
Structure
Detailed inspection of towers should be performed every one to three years by
an experienced inspector who can climb the tower and check all components.
Cell site maintenance personnel can perform an effective partial inspection
without leaving the ground, and this is recommended:
•
once a year
•
following a severe storm
•
following a prolonged period of heavy icing
Use binoculars or a spotting scope if necessary. To perform a partial inspection:
•
check the tower base for cracks, concrete break up and upheaval
•
check all guy anchors for cracks or upheaval
•
check guy tension and attachment
•
check fasteners for security
•
check all components for rust
•
check for flaking paint (often a sign of over-stress)
Tower lighting
Visually confirm operation of the tower lights every time you are at the site
after dark. When the tower is climbed for structural inspection, the lights
should be thoroughly checked at the same time.
Grounding
Check all grounding that is accessible from the surface during your outside
grounding check. When the tower is climbed for structural inspection,
grounding on the higher parts of the tower should be checked at the same
time.
Paint
Painted towers need to be re-painted every few years. Check the over-all
condition of the paint on an annual basis and re-paint as necessary.
Summary of Contents for DualMode 800
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Page 6: ...vi Publication history Nortel Networks Confidential 411 2051 500 Draft 00 01 November 1999...
Page 82: ...2 20 Periodic maintenance 411 2051 500 Draft 00 01 November 1999...
Page 90: ...3 8 Test equipment and precautions 411 2051 500 Draft 00 01 November 1999...
Page 100: ...5 6 Master Oscillator tests 411 2051 500 Draft 00 01 November 1999...
Page 106: ...6 6 Antenna and transmission line tests 411 2051 500 Draft 00 01 November 1999...
Page 116: ...8 4 Alarm Control Unit ACU tests 411 2051 500 Draft 00 01 November 1999...
Page 138: ...10 2 ICRM tests 411 2051 500 Draft 00 01 November 1999...
Page 200: ...12 10 Enclosure maintenance 411 2051 500 Draft 00 01 November 1999...
Page 208: ...A 8 Appendix A Frequency table 411 2051 500 Draft 00 01 November 1999...
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