HP 83236B S Interface manual Modulation Quality See Rho

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Glossary

Frame A basic timing interval in the system. For the Access channel, paging channel, and traffic channel, a frame is

20 ms long. For the sync channel, a frame is 26.666...ms long.

Frame Clocks A phase-locked loop in the CDMA Cellular Adapter that provides the following CDMA clocks for internal or external (through the rear-panel, 9-pin connector) use:

•2 second

•80 millisecond

•27 millisecond

•20 millisecond

Frame Delay Pulse An internal timing pulse that initiates the Cellular Adapter’s CDMA frame clocks. The frame delay pulse occurs after the frame delay timer expires.

Frame Delay Timer A timer that determines the interval between the sync pulse and the frame delay pulse.

Frame Error Rate (FER) A measure of the performance of a digital receiver. For a given data rate, the ratio of frames received incorrectly to the total number of frames sent. Also referred to as Frame Error Ratio.

Intermediate Frequency (IF) The frequency resulting from a downconversion process.

Mcps Megachips per second (one million chips per second).

Modulation Quality See Rho.

Modulation Symbol The output of the data modulator before spreading. On the reverse traffic channel, 64-ary orthogonal modulation is used and six code symbols are associated with one modulation symbol. On the forward traffic channel, each code symbol (when the data rate is 9600 bps) or each repeated code symbol (when the date rate is less than 9600 bps) is one modulation symbol.

No Noise spectral density. See Eb/No.

Offset Quadrature Phase Shift Keying (OQPSK) A form of modulation that applies different data sequences to two carriers separated by 90o. The two different data sequences are staggered by half a modulation symbol time. See Also Quadrature Phase Shift Keying.

Paging Channel A code channel on the forward channel used for paging mobile stations. Of the 64 Walsh functions used for channelization on the forward link, one through seven (inclusive) can be used for paging channels.

PCS see Personal Communications Services.

PCS Interface. The HP 83236B. Used to translate signals from the PCS band into the range of the Test Set and to provide a calibrated CDMA signal source.

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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 Perform Cdma Tests ProblemsIf You Had Perform Cdma Tests Making Measurements Making Measurements Transmitter Measurements Receiver Measurements Other OverviewOverview Average PowerRequirements 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 Information ConfigurationReference 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 Turning Off Using AutostartAutostart Feature Turning OnConnections 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 PowerReceiver Tests Rho MeasurementsCode Domain MeasurementsSensitivity 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