HP 83236B S Interface manual Glossary

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Glossary

Personal Communication Services (PCS) Emerging wireless networks using digital modulation formats and operating in the frequency band between 1.8 and 2.4 GHz.

Pilot Channel An unmodulated, direct- sequence, spread-spectrum signal transmitted continuously by each CDMA base station. The Pilot channel allows a mobile station to acquire the timing of the forward CDMA channel, provides a phase reference for coherent demodulation, and provides a means for signal strength comparisons between base stations for determining when to hand off.

Pilot PN Sequence A pair of modified maximal length PN sequences with period 215 used to spread the forward CDMA channel and the reverse CDMA channel. Different base stations are identified by different pilot PN sequence offsets.

Pilot PN Sequence Offset Index The PN offset in units of 64 PN chips of a pilot, relative to the zero offset pilot PN sequence.

PN Chip The time duration of one binary bit in the PN sequence, which is equal to the reciprocal of the frequency at which the PN sequence generator operates. For example, if the PN generator operates at 1.2288 MHz, then a PN chip is 813.802 ns.

PN Sequence Literally "pseudo-noise sequence." A periodic binary sequence (with 0 mapped to 1, and 1 mapped

to −1). Typically a PN sequence has good autocorrelation which (when normalized) equals 1 for zero shift between the two sequences, and −1/N, where N is the period, for all other shifts.

PN Sync Pulse A signal to the CDMA Generator that initiates pilot PN sequence generation. The start of each pilot PN sequence is synchronized at the Test Set’s RF IN/OUT port to the 27 millisecond frame clock.

Quadrature Phase Shift Keying (QPSK) A form of modulation that applies different data sequences to two carriers separated by 90 ° .

Quadrature Spreading Frequency spreading performed using pilot PN sequences at a 1.2288 Mcps rate. Also referred to as "short sequence spreading".

Reference Signal A replica of the ideal CDMA waveform. The reference signal resides on the Cellular Adapter’s DSP analyzer and is correlated with a signal- under-test to determine waveform accuracy and timing offset.

Reverse CDMA Channel The CDMA channel from the mobile station to the base station. From the base station’s perspective, the reverse CDMA channel is the sum of all mobile station transmissions on a CDMA frequency assignment.

Reverse Link The link direction from the mobile station to the base station. Also referred to as the uplink.

Reverse Traffic Channel A reverse CDMA channel used to transport primary traffic, secondary traffic, and signaling traffic from a single mobile station to one or more base stations.

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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 If You Had ProblemsPerform Cdma Tests Perform Cdma Tests Making Measurements Making Measurements Overview Transmitter Measurements Receiver Measurements OtherRequirements Average PowerOverview 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 Reference ConfigurationInformation 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
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