2-4
Periodic maintenance
411-2051-500
Draft
00.01
November 1999
Microwave
Refer to the manufacturer’s instructions for periodic maintenance.
Transmission level and noise tests should be conducted once a year.
Copper audio link
The susceptibility of copper to noise and level problems requires more
frequent checks than digital or microwave facilities. Perform noise and level
checks quarterly on the T-1 transmission facilities.
Power
Clean, reliable power is essential to your cell site. The following are generic
periodic maintenance recommendations. Consult the manufacturer's
documentation for specific maintenance and specifications.
Battery
The batteries used in the DualMode 800 Enclosure are virtually maintenance
free. For routine check or maintenance procedures, refer to manufacturer's
recommendation.
Rectifiers
The rectifiers used in the DualMode 800 Enclosure are virtually maintenance
free. For information, refer to the DualMode 800 Enclosure Functional
Description, 411-2051-100.
Fuses/breakers
Whenever you arrive an enclosure site, it is a good idea to verify that the
circuit breakers are on and the fuses are good.
Cabling and connections
Whenever equipment is installed or changed, check the cabling and
connections. Take note of any suspect cables that give you problems from
time to time.
Inside grounding
Inside grounding performs two functions: it prevents noise from one unit
getting into other equipment, and it ties all equipment together for protection.
In addition to checking for and repairing any deterioration of the grounding
system, you should also check to see that all new equipment installed at the
site is grounded properly. (Refer to the DualMode 800 Enclosure Power and
Ground Verification.)
Summary of Contents for DualMode 800
Page 2: ......
Page 4: ......
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...
Page 215: ......