HP 83236B S Interface manual Glossary

Page 78

Glossary

Code Domain Analyzer An instrument that measures individual Walsh Channel characteristics in a CDMA channel. The Cellular Adapter can display all 64 Walsh Channels in a received signal and display their power, phase, and timing relationship.

Code Domain Phase A measurement mode that provides the relative phase relationship between various Walsh Channels and the Pilot Channel.

Code Domain Power A measurement mode that presents the signal strength of the Walsh Channels in a CDMA signal. It indicates the division of the total power in the channel as shared by the Pilot, Sync, Paging, and Traffic channels.

Code Domain Timing A measurement mode that indicates the relative timing relationship between various Walsh Channels and the Pilot Channel.

Data Block The sampled and quantized record of a portion of the IF waveform at the input to the DSP analyzer. The data block’s length is determined by the Interval field on the CDMA ANALYZER screen.

dBm/Hz A measure of power spectral density. dBm/Hz is the power in one Hertz of bandwidth, where power is expressed in units of dBm.

dBW A measure of power expressed in terms of its ratio (in dB) to one Watt.

Downconverter An RF network using a local oscillator to translate an input signal to a lower (intermediate) frequency.

Downlink See Forward Link.

Eb The energy in an information bit.

Eb/N0 The ratio between the energy of each information bit (Eb) and the noise spectral density (No). This ratio is usually expressed in dB.

Even-Second Clock A clock that occurs every two seconds.

FER See Frame Error Rate.

FIR Filter Finite Impulse Response filter. A filter for which the output, in response to an impulse input, totally dies away after a finite time interval. The term is usually used in reference to a digital filter.

Forward CDMA Channel A CDMA channel from a base station to mobile stations. The forward CDMA channel contains one or more code channels that are transmitted on a CDMA frequency assignment using a particular pilot PN offset. The code channels are associated with the pilot channel, sync channel, paging channels, and traffic channels. The forward CDMA channel always carries a pilot channel and may carry up to 1 sync channel, up to 7 paging channels, and up to 63 traffic channels, as long as the total number of channels, including the pilot channel, is no greater than 64.

Forward Link The link direction from the base station to the mobile station. Also referred to as the downlink.

Forward Traffic Channel A code channel used to transport primary traffic, secondary traffic, and signaling traffic from the base station to the mobile station.

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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 Turning On Using AutostartAutostart Feature 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 ResultsMeasurements Rho MeasurementsCode Domain 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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