HP 83236B S Interface manual Glossary

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Glossary

Rho The measure of the waveform quality of a modulated signal in a CDMA system. A received signal is compared to an ideal, reference, signal. A high correlation between the received signal and the reference represents a high waveform quality factor.

Sync Channel A code channel in the forward CDMA channel that synchronizes the mobile station with the base station.

Sync Pulse A pulse that starts both the frame delay timer and the PN sequence delay timers. A sync pulse occurs when:

•the Test Set is powered on, or

•an external even-second clock is received on the CDMA Cellular Adapter's front-panel EVEN SECOND/ SYNC port.

Test System A test equipment station consisting of a Test Set, Cellular Adapter, and PCS Interface. Used for testing CDMA base station equipment operating in the PCS band.

System Time The time reference used by the network. System time is synchronous to Universal Coordinated Time (except for leap seconds) and uses the same time origin as Global Positioning Satellite (GPS) time. All base stations use the same System Time (within a small error). Mobile stations use the same System Time, offset by the propagation delay from the base station to the mobile station. See also Universal Coordinated Time.

Test Set The HP 8921A. Used for installation and maintenance of AMPS, TDMA, and CDMA cell site equipment.

Traffic Channel A communication path between a mobile station and a base station, used primarily for communicating service- option related traffic. The term traffic channel implies a forward traffic channel and reverse traffic channel pair. See also forward traffic channel and reverse traffic channel.

Trigger Event Trigger event describes the operating state of the DSP analyzer at the time a qualified trigger causes the DSP analyzer to acquire and begin measuring the digitized IF waveform from the CDMA transmitter-under-test.

Universal Coordinated Time (UCT) An internationally agreed-upon time scale that has the same rate as atomic time. UCT is corrected by step adjustments of exactly one second as needed to remain within 0.9 seconds of astronomical time.

Uplink See Reverse Link.

Walsh Chip The shortest identifiable component of a Walsh function. The are 2N Walsh chips in one Walsh function where N is the order of the Walsh function. On the forward CDMA channel, one Walsh chip equals 1/1.2288 MHz, or 813.802. . .ns. On the reverse CDMA channel, one Walsh chip equals 4/1.2288 MHz, or 3.255... us.

Walsh Cover A coding method that uses Walsh functions to create a set of mutually orthogonal CDMA signals. In the CDMA system, a code channel is formed by a Walsh cover.

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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
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