Precautions
3-3
Wireless Solutions
DualMode 800 Enclosure
Maintenance Manual
MTX08
14. Directional Compass
15. Binoculars or Spotting Telescope
16. Frequency counter: 1 Hz resolution and 0.025 ppm reference
Note: Frequency counter should be a factor of 10 more stable than the
oscillator being measured, for example, Hewlett Packard 53181A with
option 12 Frequency Counter.
17. PC or laptop with the MCPA software package and a null modem cable
(see the MCPA section in Chapter 1, Equipment operation, for details)
Precautions
Equipment warm-up
Do not perform tests immediately after the installation of any equipment. The
TRU, the MCPA, the ICRM and the test equipment should be powered up for
at least half an hour before the tests. Inaccurate measurements may result if
the warm-up period is less than 30 minutes.
Test equipment
Proper setup of the test equipment is critical in obtaining proper test results.
Consistency of setup and techniques from one person to another is essential
for obtaining proper system operation. Calibrate all test equipment before
use.
Rule of thumb—subtracting 3 dB halves the power level:
•
+45.0 dBm is approximately 32 watts
•
+33.0 dBm is approximately 2 watts
•
+30.0 dBm is approximately 1 watt
•
+27.0 dBm is approximately 1/2 watt
•
0 dBm is approximately 0.001 watt (1 milliwatt)
CAUTION
Equipment damage
Make sure that the test equipment maximum allowable input
levels are not exceeded. Add an attenuator to reduce the power
if 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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