HP 83236B S Interface Errors While Attempting Measurements, Cdma Measurement not Correlating

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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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Contents CDMA/PCS Base Station Test Software, User’s Guide Restricted Operating Overview Conventions Used in this Book Contents Making Measurements Receiver Sensitivity Operating Overview Setting the Test System Beep Glossary Index Getting Started Introduction You must supply Required EquipmentSynth REF Load and Run the CDMA/PCS BS Test Software Tests Main Menu screen CDMA/PCS Test Software main menu features Select Configuration Information Menu Configure the SoftwareScroll to and select your band of interest User k1 Problems Perform Cdma TestsIf You Had Perform Cdma Tests Making Measurements Making Measurements Transmitter Measurements Receiver Measurements Other OverviewAverage Power OverviewRequirements Information Menu under TX Measurement Path Loss StepsModulation Quality Rho Measurement not Correlating in , Troubleshooting, on Code Domain Power Menu Code Domain Timing Details on the use of the Code Domain Analyzer screen Code Domain Phase Already selected Analyzer Transmit SpectrumSteps Go to Spectrum Analyzer @ Present Chan Steps Go to Spectrum Analyzer & Enter Freq Transmit Spectrum Receiver Sensitivity Main menu, enter the Base Station Channel number Receiver Performance in Additive Noise Error Rate FER is measured at each Eb/No levelEb/No Level Search for PN Offset PN Offset not Found Check Even-Second Clock Check for a valid clock signal from the base stationCorrelating in , Troubleshooting, on Check Even-Second Clock Operating Overview Configuration InformationReference To select a new PCS Band Selecting a PCS BandChannel plans for PCS Band selections You must know the following loss values Compensating for TX and RX Measurement Path LossBeep Saving Configuration Information to MemoryRequirements Steps Loading Configuration Information from MemoryPurging Configuration Information from Memory Autostart Feature Using AutostartTurning On Turning OffConnections Viewing Instrument ConnectionsSetting the Test System Beep To Memory on Cdma Base Station Operating Overview Troubleshooting Troubleshooting Memory Overflow Errors Errors When Loading and Running the SoftwareTest System Configuration Errors at Runtime Compensation not performed. Check Duplex OUT cable. Retry? Errors When Loading and Running the Software Cdma Measurement not Correlating Errors While Attempting MeasurementsErrors While Attempting Measurements Incorrect Base Station Channel entry Frame Error Rate Receiver MeasurementsErrors While Attempting Measurements Questionable Measurement Results Average PowerCode Domain Rho MeasurementsMeasurements Receiver TestsSensitivity tests random data not selected for signal source Questionable Measurement Results Glossary Glossary Modulation Quality See Rho Glossary Glossary Glossary Index Index FER Index Oqpsk PCS Qpsk UCT Walsh chip