12-4
Enclosure maintenance
411-2051-500
Draft
00.01
November 1999
General precautions
There are some general precautions that need to be aware of when replacing
components.
RF radiation hazard
Radio Frequency (RF) radiation is hazardous to anyone working in the cell
site. Before removing any RF cable, ensure that the related power amplifier is
turned off. All RF cables should be connected properly and all unused RF
ports should be terminated with an appropriate terminator.
Electrostatic Discharge (ESD) control
When handling any circuit board, take care to prevent damage from static
discharge. Observe the following rules.
1. To prevent electrostatic discharge, do not attach ribbon cables to circuit
boards until the circuit boards are in place.
2. To dissipate any static charge, wear a wrist strap in contact with the skin.
3. Connect the wrist strap ground cord to the equipment cabinet ground.
Cable/connector identification
Label all cables and connectors before disconnecting them from any cell site
equipment. This will minimize the time required for tracing the connections
and also reduce the possibility of incorrect connections.
CAUTION
Do NOT disconnect any RF cables when transmitters are on.
CAUTION
Do not let the circuit board come into contact with clothing at
any time, as the grounding strap cannot dissipate static charges
on fabrics.
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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