Time Offset | Agilent Technologies 8935 series e6380a specification

CDMA Measurements - Screens and Control Fields

CDMA Measurements

Time Offset

Time offset is displayed when the Rho measurement is selected. Time offset is the time difference between the base station’s even second and the start of the short sequence. It indicates how well your transmitter’s signal is time-aligned to system time. Time offset is measured at the base station’s antenna. The displayed value is based on the value entered in the PN Offset field. (See “PN Offset” on page 165.)

In Figure 5-2 on page 136 the first example is a measurement with a time offset of zero. The beginning of the received data block aligns with the first pilot PN chip of the reference signal. Zero time offset indicates that the trigger event to the CDMA Analyzer coincided with the arrival of the base station signal’s first pilot PN chip.

When the base station’s signal is delayed relative to the trigger event, time offset will be a positive value. The second example is a measurement with a positive time offset. The beginning of the data block will align with a portion of the reference signal toward the end of a pilot PN sequence. This indicates that the trigger event to the CDMA Analyzer occurred when the base station was still transmitting a pilot PN sequence prior to the first pilot PN chip of the expected sequence.

When the base station’s signal is early relative to the trigger event, time offset will be a negative value. The third example is a measurement with a negative time offset. The beginning of the data block will align with a portion of the reference signal after the first pilot PN chip. This indicates that the trigger event to the CDMA Analyzer occurred after arrival of the base station signal’s first pilot PN chip.

Screens on which this measurement is displayed

•CDMA ANALYZER

•CDMA GENERATOR

•CODE DOM (Code Domain Analyzer)

Chapter 5

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Agilent Technologies 8935 series e6380a manual Time Offset

Contents

Agilent Part Number E6380-90019 Revision F JanuaryPage Contents Overview of the Test Set’s Built-In Tools Cdma Measurements Screens and Control Fields Analog Measurements Screens and Control Fields Contents Contents Configuration Screens and Control Fields Control Fields on the Configuration Screens 227 Signaling Encoder and Decoder Screens and Control Fields AMPS-TACS, NAMPS-NTACS Encoder and Decoder 253 Connectors Connectors Accessories, Manuals, Support Error Messages General Information Manufacturers Declaration Herstellerbescheinigung Safety Considerations Connected to the earth terminal of the power source Adjustments described in the manual are performed withInstrument must be made inoperative and be secured against Any unintended operation This product is a Safety Class I instrument provided with a Protective earthing ground incorporated in the power cordMains plug shall only be inserted in a socket outlet Provided with a protective earth contact. Any interruption Lifting and Handling Consumables Product Markings Certification Declaration of Conformity Defects in material and workmanship when properly installed Like-newIts programming instructions due to such defects Price upon prompt return of the product Chapter Regional Sales and Service Office s Assistance Power Cables Power CablesStraight/90 8120-1692 Inches, mint gray Used in the following locations Peru Used in the following locations Switzerland JIS C 8303, 100 Straight/90 8120-4754 Inches, dark gray 90 /Straight 8120-1351 Inches, mint gray LineNeutral 8120-4379 Inches, jade gray Straight/90 Used in the following locations System Cabinets Power Cables Product Description Sinad SNR What is in This Manual DocumentationConventions Used in This Manual Which Document is Required? Document NavigationDocument Part Number Usage Trademark Acknowledgments Getting Started Before Connecting a Radio on Before Connecting a Radio Using the cursor-control Knob or Screen Keys Changing the Test Set’s Display To change the measurement screen Changing the Control Fields Unit-of-Measure FieldTo change a unit-of-measure field Underlined Entry Field To Change an underlined entry One-of-Many Field To make a one-of-many choice Numeric-Entry Fields Numeric-Entry FieldTo change a value Decimal Values Hexadecimal Values How do I Verify that the Test Set is Operating Properly? Cdma Spectrum Operating Overview Operating Overview Displaying Cdma Measurements ADC Full Scale ADC FS Magnitude Error, Phase Error Diagram Selecting Code Domain Measurements Frequency Error, Frequency Transmitter TXPowerDisplaying Analog Measurements RF Measurements Measurement AF Anl In Setting Displaying AF MeasurementsFM Deviation, AM Depth, AC Level SINAD, Distortion, SNR, AF Frequency, DC Level Displaying SINAD, Distortion, SNR, DC Level, or AF Frequency Displaying Measurement Results on a Meter Scale To display the meter scaleTo set the meter’s end points and scale intervals Operating Overview Calibrating the Channel Power Measurement Cdma Analyzer Calibrating the Channel Power Measurement Code Domain Calibrating the Adjacent Channel Power ACP Measurement Changing the Increment or Decrement Setting Using the Factor of 10 Increment/Decrement KeysSpecifying An Increment Value for the Arrow Keys or Knob Using Measurement Limit Indicators To reset or remove limitsTo set high and low limits To remove a limit Setting a Measurement Reference To set a reference Averaging Measurements To use measurement averagingHow the Test Set Averages Measurements Setting an RF Generator/Analyzer Offset To set an RF Offset Saving and Recalling Instrument Setups To save an instrument setupTo recall an instrument setup Press Recall Poweron Settings To remove clear an individual save registerTo clear all save registers Register Names Base Settings Memory ConsiderationsInstrument Hardware Changes Using User Keys Using Pre-Defined User Keys Assigning and Releasing User Keys To assign local user keysTo release local user keys To assign global user keys Replacing Batteries Overview of the Test Set’s Overview of theTest Set’s Built-In Tools Using the RF Tools Program Loading and Running RF Tools Software Menu Screen Test Results/BTS Utility Setup Test Results/BTS Utility Setup Screens To use a printer for data collection Swept Gain To use a laptop interface other than the BTS Laptop UtilityMeasurement Description Making the Measurement Selecting the Swept Gain Measurement Test Level value to avoid damage to that device Level for the Duplex OUT level in dBm parameterPress k1 Begin Tst Example of a Swept Gain Plot Screen Specifications Discrete Frequency Insertion Loss Press k1 Proceed when you are finished with this screen. Particular testSecond display is enlarged for easier reading Swept Insertion Loss 10 Selecting the Swept Insertion Loss Measurement 11 Swept Insertion Loss Setups Estimating Swept Insertion Loss Using a Single Connection Swept Return Loss Select Main Menu Swept Return Loss Power level. To avoid damage to the ANT in port, enter an 13 Swept Return Loss Setups 14 Example of a Swept Return Loss Plot Screen Specifications Cable Fault Test Signal Can Cause InterferenceTime domain can be used to find the physical distances. Locations by viewing it in units of distance Select Main Menu Cable Fault Measurement Greatest accuracy is obtained when you enter a cable length Cable length, enter a value 1.5 times the estimated lengthToggles the selection between feet and meters K1 HELIAX, k3 RG, or k5 Custom 17 Cable Fault Setups 18 Example of a Cable Fault Plot Screen Typical cable fault return loss measurements Cable Fault PerformanceReplot Data Files Select Main Menu Transfer Stored Data 21 Transfer Stored Data Screen SA Spectrum Analyzer Self Calibration ON/OFF 22 SA Self Calibration OFF/ON Screen Catalog PC Memory Card 23 Catalog Memory Card Screen Using the Code Domain Analyzer Selecting the Code Domain Analyzer’s Controls Menus 24 Code Domain Analyzer Menus IS-95 25 Code Domain Analyzer Menus IS-2000 Using the Spectrum Analyzer Setting Resolution Bandwidth and Sweep RateRelationship between Span, Resolution Bandwidth, and Sweep Automatic Calibration Selecting the Spectrum Analyzer’s Controls Menus 26 Spectrum Analyzer Controls Menus Using the Spectrum Analyzer’s Delta Markers Delta FrequencyDelta Level Reference Marker Ref Mrkr Level and Frequency Using the Spectrum Analyzer Mask Displaying the Spectrum Analyzer Mask Settings for mask in Figure Defining the Fixed Mask’s LimitsPoint Point Level Frequency Defining the Relative Mask’s Limits Turning Off the MaskTurning Off the Mask’s Failure Beeper Using the Voltmeter and Audio Frequency Counter Set to AudioMeasuring AC and DC Voltages AC Level Set to DC Level or AF Freq Set to match source Using the Oscilloscope Scope 29 Inputs and Filters for the Oscilloscope Selecting the Oscilloscope’s Input Using the Oscilloscope’s Marker Selecting the Oscilloscope’s FiltersTriggering the Oscilloscope Using Ibutil Programs Copypl Securing aTest Procedure Clearing RAM Using the Listopts list options Program Using the Demo Program Using the Stplt store or plot Program Step Cdma Measurements Screens and Control Fields 130 Average Power Measurements Cdma MeasurementsAvg Pwr Screens on which this measurement is displayed Adjacent Channel Power Measurements Channel Power MeasurementsScreens on which this measurement is made Chan Pwr Rho Measurements Rho Frequency Error Freq Err Estimated Rho Est RhoCode DOM Code Domain Analyzer Time Offset Carrier Feedthrough Chapter 137 Error Vector Magnitude EVM Measurements Magnitude ErrorPhase Error Code Domain Power, IS-95 Code Domain Measurements IS-95 Selecting Absolute or Relative Code Domain Power, IS-95 only Code DOM Code Domain Analyzer, IS-95 only Fast Power Code Domain Phase PhseCode Domain Timing Timing Advantages of Using IS-2000 Code Domain Measurements IS-2000 Building a tree using the Bit Reverse method Interpreting IS-2000 Channel Ordering Channel numbers. The Walsh index utilizes Walsh orders 0 11 Code Domain Power, Bit Reverse Ordering Available Measurements in the Code Domain Code Domain Power, IS-2000 Reading Code Domain Power, IS-2000 Code Domain Power & Noise Code DOM Code Domain Analyzer, IS-2000 Code Domain Complex Power Code Domain Fast Power Synchronize IQ Constellation Diagram, IS-2000 only PN Offset Search Control Fields for Cdma Measurements # of FramesACP Cal ACP Fltr BW ACP Offset ADCfs or ADC FSAmplitude Code DOM Code Domain Analyze screen gain controls menu Analyzer Cdma analyzer Analyzer code domain analyzerAnl Dir COD DOM Code Domain Analyzer main controls menu Anl Special Auto ZeroCarrier FT or Carrier Feedthru Chan Num Chan Size CD pwr unitChn Pwr Cal Controls CW RF PathCOD DOM Code Domain Analyzer all menus Data Rate Data Source Even Sec Find PNFreq Err Gain Gen DirCOD DOM Code Domain Analyzer gain controls menu Gen Mode Gen Special Input Atten Input PortLvl Code DOM Code Domain Analyzer gain controls menu Power Level Marker LvlMarker Pos Meas Intvl or Meas Int COD DOM Code Domain Analyzer fast power setup controls menu Meas OrderMeasurement Num Avgs Phase/div COD DOM Code Domain Analyzer FP setup controls menuOfs Trnsfer Output Port Phse PN IncrmentPN Offset PN Offset or PN Ofs Pwr Gain Pwr Intvl Pwr RefPwr Scale IS-95 Pwr Scale IS-2000 Pwr Zero Qual Event Rate RC-3 Rate RC-4Rate RC-5 Code DOM Code Domain Analyzer trigger controls menu RF Channel RF Gen FreqRF In/Ant Screens on which this field is displayed Sprd Fact Spread Factor Start FrameThreshold Time Time/div Time Offset Time Ofs Trig Event Tune Freq Walsh Chan Walsh Order Control Fields 178 Analog Measurements AC ControlAM Depth Measurement AF Freq Measurement DC Level Measurement Distn Distortion Measurement FM Deviation Measurement Frequency Error Measurement Frequency Measurement TX Power Measurement Is signal to noise ratio of the audio input signal Sinad MeasurementSNR Measurement Signaling Decoder All Modes Control Fields for Analog Measurements#Pts AF Anl AF Cnt Gate AFGen1 Freq AFGen1 To AFGen2 Freq Signaling Encoder All Modes AFGen2 To Atten Hold Spec ANL RF generator controls menu Audio In Lo Audio OutAuto/Norm Scope trigger controls menu Center Freq Spec ANL all menus except mask controlsSpec ANL main controls menu Cont/Single DC FM ZeroDe-Emp Gain De-Emphasis Detector DisplayDetector Types Edit Mask EditPt Ext Load R Ext TTLFilter FM Coupling Freq Delta Mrkr Freq maskReference Marker Frequency Level Delta Marker Spec ANL all menus when in normal mode except mask controls Freq normal markerFreq Ref Mrkr Normal Marker Frequency Level Gain Cntl If Filter Input Gain Spec ANL auxiliary controls menu Internal Level div Level maskLvl Delta Mrkr Lvl marker Lvl normal markerScope all control menus Lvl Ref Mrkr Marker To Peak+Marker To Peak Scope marker controls menu Marker To Mask BeepMask Type Spec ANL marker controls menu Mod In To No Pk/Avg Normalize Norm/Delta Notch Freq Notch GainOffset Freq Pk Det To Port/Sweep PositionScope marker controls menu Spec ANL marker controls menu Pos/Neg Ref LevelRef Mrkr Reset RF Cnt GateSpec ANL RF generator or main controls menu Maximum signal levels are printed on the connector panel Key or turn the Test Set off and on to reset itSpec ANL RF Gen controls menu This field selects the input port for the spectrum analyzer Scope To Sensitivity RF analyzer Sensitivity spectrum analyzer Settling Span Speaker ALCSpeaker Vol Sets the span of frequencies to be displayed on the screen Squelch Track/Fixed This field selects the horizontal sweep time per divisionTime-per-division is selected from a list of choices Scope main controls menu Trig-Delay Resolution TX Pwr Meas TX Pwr Zero Vert/div Vert Offset Configuration Screens 224 Configuring the Instrument Setting the Date and TimeChanging the Beeper’s Volume Turning Off User Messages Configuring for Printing a Screen Printing a ScreenTo interrupt printing Control Fields on the Configuration Screens Screens Where Field is PresentAbort Print Antenna Base Freq User Defined Beeper Call Chan Space User DefinedCdma Std 230 Command Escape Character Connection Time-outData Length Date Display User MessagesDuplex Out Ext Ref FF at EndFF at Start Firmware Inaccessible OUT connectorFlow Control Frame Clock Output Gen-Anl Gen-Anl User Defined Hold-off Delay Gpib AdrsIbasic Echo Incoming Call Security Inst EchoLines/Page Mode Modem Configuration Model Modem Initialization/Configuration Modem Mode Notch Coupl Number to CallOpt Cdma TB Parity Password Printer AdrsPrinter Port Print Title Range Hold Remote Mode Ref Select Retries RF Chan Std RF Display RF Gen VoltsSee the RF Chan Std on page 244 for more information RF In/Out RF Level Offset RF Offset Save/Recall Serial Baud Serial9Serial No This field displays the serial number of the Test Set Serial Port StatusStop Length Total RAM Signaling Encoder and Decoder Signaling Encoder and Decoder Screens Decoder’s Signal SourceDecoder Frequency Measurements Encoder AMPS-TACS, NAMPS-NTACS Encoder and Decoder Control and Voice Channel IdentifiersEncoder/Decoder Interaction Decoder Mode Differences AMPS-TACS, NAMPS-NTACS DecoderInterpreting Decoded Data Recc and AMPS-TACS RVC Measurements Decoding the Reverse Control Channel Recc Data NAMPS-NTACS Reverse Voice Channel Measurements Measure Field Decoding NAMPS-NTACS Reverse Voice Channel RVC Data Dtmf Sequence Encoder and Decoder Measurement Limits Function Generator Encoder and Decoder Decoding Considerations Control Fields for the Signaling Encoder and Decoder DelayArm Meas Bursts Signaling Decoder Modes AMPS-TACS, NAMP-NTAC Busy/IdleChannel Data hex Signaling Decoder Signaling EncoderData Level Data Rate analog Signaling Encoder Modes NAMP-NTAC Signaling Decoder Modes NAMP-NTACDSAT/DST hex Filler Focc Data you enter here Frequency Gate TimeHi Tone Input Level De-emphasis Effects on Input Level Examples of Input Level Settings Signaling Decoder All ModesLo Tone Measure Message Focc AMPS-TACS/NAMPS-NTACS Focc Message and Filler Data Format Signaling Encoder Modes AMPS-TACS Message FVC AMPS-TACS Message FVC NAMPS-TACS Message/DST FVC Signaling Decoder All Modes Signaling Encoder All Modes Signaling Encoder Modes Dtmf Signaling Decoder Modes DtmfNum of Bits Off Time On Time PolarityNormal Operation Inverted Operation Signaling Encoder Modes Dtmf Pre-EmpRecc Data hex SAT Freq FVC Send Send Dsat FVCSend Filler Focc Send Mode Signaling Encoder Modes Func GenSine Units Single/Cont Standard StopDecoder Operating Considerations Encoder Operating Considerations Symbol Frequencies Hz Stop Dsat FVCStop Filler Focc Stop Meas Signaling Decoder Modes AMPS-TACS, NAMP-NTAC, Func Gen Trigger Pattern binTrig Level Twist Twist and Pre-emphasis InteractionExamples of Twist and Pre-emphasis Interaction Example Waveform Connectors Connectors Operating Considerations ANT Audio Audio OUT Data EXT REF EXT Scope Trig Parallel Parallel Port Pin Assignments RF IN/OUT Serial 9, 10, Serial Port Pin AssignmentsSerial Port Pin Assignments Pin Description Video OUT Accessories, Manuals, Support Modifications Agilent Technologies Accessories AccessoriesExternal Monitor Agilent Technologies Manuals English and Other Agilent Technologies Test Software OptionsNumber Description Order Description Number 1D5 High Stability Reference Support for Your Instrument Getting HelpCustomer Training Agilent Regional Sales and Service Offices Error Messages General Information About Error Messages Positive Numbered Error MessagesExample 11-1 Positive numbered error messages take the form Example 11-2 For example Negative Numbered Error Messages Ibasic Error MessagesExample 11-4 Ibasic error messages take the form Example 11-3 For example Gpib Error Messages Text Only Error MessagesExample Gpib error messages take the form Example Text only error messages take the form Non-Recoverable Firmware Error Message DisplayWarbles and Beeps 304 Chapter 305 306 Index 308 Index 309 310 Index 311 312 Index 313 314 Index 315 316 Index 317 318 Index 319 320 Index 321 322 Index 323 324