Chapter 4, Troubleshooting

Errors While Attempting Measurements

Errors While Attempting Measurements

CDMA Measurement not Correlating

NOTE:

Problem:

If your Test System is not set up correctly for some of the tests, you may see the following message posted at the top of the display:

Cannot correlate to input signal. Check setup.

The error message can appear while in many of the menus, but it will affect the following main menu selections:

•Go to Code Domain Analyzer Screen

•Measure Rho Parameters

For an on-screen summary of the possible causes and solutions, press the Diagnose (k4) key.

Possible causes and solutions:

1Base Station Channel entry.

The Software tunes the Test System to the transmitter frequency based on your entry for Base Station Channel. The entry must match the channel your base station is set to transmit on. Verify the channel number entry in the Base Station Channel field on the main menu screen. If you want to verify the frequency the Test System is tuned to, see the TX Freq setting at the bottom of the main menu screen.

2PN Offset entry.

For proper correlation, you must enter the PN Offset value that matches that of the transmitter being tested. Check the entry in the main menu level. If you do not know the PN offset, see "Search for PN Offset" on page 44

3Missing an Even-Second clock timing signal.

You must have access to the Even-Second clock signal from the base station to achieve proper correlation to the CDMA signal. Verify that the signal is accessible and make sure that it is connected to the EVEN SECOND/SYNC IN port on front of the Cellular Adapter. Check to be sure that any hardware switching needed to turn the signal on has been done. To verify your Even-Second clock signal, see "Check Even- Second Clock" on page 46.

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