HP 83236B S Interface manual To Memory on

Page 60

Chapter 3, Operating Overview

An Alternative Test-System-to-Base-Station Timebase Configuration

An Alternative Test-System-to-Base-Station Timebase Configuration

	Chapter 1 describes the most common method of connecting timebases between
	the Test System and the base-station-under-test. This section shows an alternative
	way of connecting the timebases using the CDMA TIMEBASE IN port of the
	CDMA Cellular Adapter (rather than the rear-panel SYNTH REF IN port).
Steps	1 Connect the timebases as shown in figure 25. Note the connections from the BNC “tee”
	on the Test Set’s 10 MHz REF OUTPUT to both the Cellular Adapter and the PCS
	Interface.

NOTE:	This figure does not illustrate all rear-panel connections between the Cellular Adapter and
	Test Set. Refer to the Cellular Adapter User’s Guide to verify these connections.

2From the main menu, select Configuration Information Menu.

3Note the selection for the Base Station Reference To field. If it is set to SYNTH REF IN, scroll down to the line and press the knob to change it to read CDMA TB IN. Otherwise, you may skip this step.

4Note the selection for Base Station Reference Freq. If it does not match the timebase frequency supplied by the base station (typically 19.6608 MHz or

10 MHz), scroll to the line, press the knob, and select the appropriate value.

5To return to the main menu, press the Main Menu (k5) key.

Notes	The timebase settings you made in the steps above will not be saved unless you
	use the Save Info to Memory feature. See "Saving Configuration Information
	to Memory" on page 54.

60

Image 60

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