User's Manual Part 4

Basic Troubleshooting – continued
MAY 2004 1X SC480 BTS Hardware Installation, Optimization/ATP, and FRU 11-5
PRELIMINARY
Cannot Communicate with
Power Meter
Table 11-4: Troubleshooting a Power Meter Communication Failure
Step Action
1 Verify power meter is connected to LMF with GPIB adapter.
2 Verify cable connections as specified in Chapter 4.
3 Verify the GPIB address of the power meter is set to the same value displayed in the applicable GPIB
address box of the LMF Options window Test Equipment tab. Refer to Table 6-23 or Table 6-24 and
the Setting GPIB Addresses section of Appendix B for details.
4 Verify the GPIB adapter DIP switch settings are correct. Refer to Test Equipment Preparation section
of Appendix F for details.
5 Verify the GPIB adapter is not locked up. Under normal conditions, only 2 green LEDs must be ‘ON’
(Power and Ready). If any other LED is continuously ‘ON’, then cycle GPIB box power and retry.
6 Verify the LMF computer COM1 port is not used by another application; for example, if a
HyperTerminal window is open for MMI, close it.
7 Reset all test equipment by clicking Util in the BTS menu bar and selecting Test Equipment > Reset
from the pull–down lists.
Cannot Communicate with
Communications System
Analyzer
Table 11-5: Troubleshooting a Communications System Analyzer Communication Failure
Step Action
1 Verify analyzer is connected to LMF with GPIB adapter.
2 Verify cable connections as specified in Chapter 4.
3 Verify the analyzer GPIB address is set to the same value displayed in the applicable GPIB address
box of the LMF Options window Test Equipment tab. Refer to Table 6-23 or Table 6-24 and the
Setting GPIB Addresses section of Appendix B for details.
4 Verify the GPIB adapter DIP switch settings are correct. Refer to Test Equipment Preparation section
of Appendix F for details.
5 Verify the GPIB adapter is not locked up. Under normal conditions, only 2 green LEDs must be ‘ON’
(Power and Ready). If any other LED is continuously ‘ON’, then cycle GPIB box power and retry.
6 Verify the LMF computer COM1 port is not used by another application; for example, if a
HyperTerminal window is open for MMI, close it.
7 Reset all test equipment by clicking Util in the BTS menu bar and selecting Test Equipment > Reset
from the pull–down lists.
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