HP 83236B S Interface manual Errors While Attempting Measurements

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Chapter 4, Troubleshooting

Errors While Attempting Measurements

5RX PN Offset not set to zero.

For receiver testing, the CDMA Generator is simulating the reverse channel (uplink) signal as it would be sent by a mobile phone. Mobiles transmit on system time, so the PN Offset should be set to zero. Make sure that the field RX PN Offset has an entry of 0.

6CDMA Generator level delivered to the receiver test port of the base station is low.

Verify that the entry for RF Level in the CDMA Generator Menu Selection matches the level intended for receiver (FER) tests. Also, you should check your entry for RX Measurement Path Loss in the Configuration Information Menu. If, in reality, you have much more loss than is indicated in the entry, the RF level at the receiver test port will be much less than is indicated in the CDMA Generator menu screen.

7Incorrect setting for CDMA Generator Mode and/or Data Source.

In the CDMA Generator Menu Selection screen, the Generator Mode should be set to Data and the Data Source should be Random.

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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 Required Equipment You must supplySynth REF Load and Run the CDMA/PCS BS Test Software Tests Main Menu screen CDMA/PCS Test Software main menu features Configure the Software Select Configuration Information MenuScroll to and select your band of interest User k1 Problems Perform Cdma TestsIf You Had Perform Cdma Tests Making Measurements Making Measurements Overview Transmitter Measurements Receiver Measurements OtherAverage Power OverviewRequirements Steps Information Menu under TX Measurement Path LossModulation 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 Transmit Spectrum AnalyzerSteps 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 Error Rate FER is measured at each Eb/No level Receiver Performance in Additive NoiseEb/No Level Search for PN Offset PN Offset not Found Check for a valid clock signal from the base station Check Even-Second ClockCorrelating in , Troubleshooting, on Check Even-Second Clock Operating Overview Configuration InformationReference Selecting a PCS Band To select a new PCS BandChannel plans for PCS Band selections Compensating for TX and RX Measurement Path Loss You must know the following loss valuesSaving Configuration Information to Memory BeepLoading Configuration Information from Memory Requirements StepsPurging Configuration Information from Memory Using Autostart Autostart FeatureTurning On Turning OffViewing Instrument Connections ConnectionsSetting the Test System Beep To Memory on Cdma Base Station Operating Overview Troubleshooting Troubleshooting Errors When Loading and Running the Software Memory Overflow ErrorsTest System Configuration Errors at Runtime Compensation not performed. Check Duplex OUT cable. Retry? Errors When Loading and Running the Software Errors While Attempting Measurements Cdma Measurement not CorrelatingErrors While Attempting Measurements Frame Error Rate Receiver Measurements Incorrect Base Station Channel entryErrors While Attempting Measurements Average Power Questionable Measurement ResultsRho Measurements Code DomainMeasurements 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