HP 83236B S Interface manual Compensating for TX and RX Measurement Path Loss

Page 53

Chapter 3, Operating Overview

Compensating for TX and RX Measurement Path Loss

Compensating for TX and RX Measurement Path Loss

	The Software can compensate for losses (through cables, attenuators, couplers,
	and so forth) between the Test System and the base station for the best accuracy in
	average power and receiver measurements. The loss values are entered into the
	Configuration Information Menu and are saved to memory if the Save
	Info To Memory feature is used.
Requirements	You must know the following loss values:
	• The total loss (in dB) between the base station’s transmitter test port and the
		RF IN/OUT port of the PCS Interface.
	• The total loss (in dB) between the RF IN/OUT port of the PCS Interface and the base
		station’s receiver test port.
	These values should include losses through any cables, splitters, attenuators, and
	directional couplers used in your test setup.
Steps	1	From the main menu, select Configuration Information Menu.
	2	Scroll to and select TX Measurement Path Loss and enter the loss between the
		transmitter’s test port and the RF IN/OUT port of the PCS Interface. Once selected, you
		can use the knob to scroll up and down in 1 dB increments or you may enter the value
		directly using the DATA keys. Press ENTER or the knob when the correct value
		appears in the inverse field.
	3	Scroll to and select RX Measurement Path Loss and enter the total loss between
		the PCS Interface’s RF IN/OUT port and the receiver’s test port.
	4	To return to the main menu, press the Main Menu (k5) key.
Notes	The loss values you entered 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.

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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 If You Had ProblemsPerform Cdma Tests Perform Cdma Tests Making Measurements Making Measurements Transmitter Measurements Receiver Measurements Other OverviewRequirements Average PowerOverview 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 Reference ConfigurationInformation 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