User's Manual Part 4

Basic Troubleshooting – continued

11-6 1X SC480 BTS Hardware Installation, Optimization/ATP, and FRU MAY 2004

PRELIMINARY

Cannot Communicate with

Signal Generator

Table 11-6: Troubleshooting a Signal Generator Communication Failure

Step Action

1 Verify signal generator is connected to LMF with GPIB adapter.

2 Verify cable connections as specified in Chapter 4.

3 Verify the signal generator 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.

Cannot Download

Table 11-7: Troubleshooting Code Download Failure

Step Action

1 Verify T1 or E1 span is disconnected from the BTS.

2 Verify LMF can communicate with the BTS devices using the LMF Status function.

3 Communication with GLI must first be established before trying to communicate with any other BTS

device. GLI must be INS_ACT state (bright green).

4 Verify the target card is physically present in the cage and powered-up.

5 If the target card LED is solid RED, it implies hardware failure. Reset card by re-seating it. If LED

alarm persists, replace with same type of card from another slot and retry.

6 Re-seat card and try again.

7 If a BBX reports a failure message and is OOS_RAM, the code load was OK. Use the LMF Status

function to verify the load.

8 If the download portion completes and the reset portion fails, reset the device by selecting the device

and Reset.

table continued on next page