Magnitude Error | Agilent Technologies 8935 series e6380a manual

CDMA Measurements - Screens and Control Fields

CDMA Measurements

Error Vector Magnitude (EVM) Measurements

EVM

EVM is a measurement of the accuracy of the phase and amplitude of the QPSK (Quadrature Phase Shift Keying) or Offset QPSK (OQPSK) modulation. Expressed as a percentage, it is the RMS magnitude value of the error vector which connects the ideal signal phasor to a measured signal phasor at the detection decision points.

Figure 5-4 Components of Error Vector Magnitude

Q	Magnitude Error

Error

	Measured	Signal
			Signal
	Ideal

evm1.ds4

Vector

Phase	Error

I

The magnitude of this error vector represents the “error” between the ideal signal and the measured signal.

As part of the measurement, the signal is corrected for clock delay, carrier frequency, carrier phase, and amplitude scaling.

Magnitude Error

Magnitude Error is the difference in the RMS magnitude value (in percent) between the ideal signal phasor and the compensated, measured signal phasor at the detected decision points.

Phase Error

Phase Error is the RMS value of the difference in phase (degrees) between the ideal signal phasor and the compensated, measured signal phasor at the detection decision points.

Screens on which this measurement is displayed

•CDMA ANALYZER

•CDMA GENERATOR

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Chapter 5

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Agilent Technologies 8935 series e6380a manual Error Vector Magnitude EVM Measurements, Magnitude Error, Phase Error

Contents

Revision F January Agilent Part Number E6380-90019Page Contents Overview of the Test Set’s Built-In Tools Cdma Measurements Screens and Control Fields Analog Measurements Screens and Control Fields Contents Contents Control Fields on the Configuration Screens 227 Configuration Screens and Control Fields AMPS-TACS, NAMPS-NTACS Encoder and Decoder 253 Signaling Encoder and Decoder Screens and Control Fields Connectors Connectors Error Messages Accessories, Manuals, Support General Information Herstellerbescheinigung Manufacturers Declaration Safety Considerations Any unintended operation Connected to the earth terminal of the power sourceAdjustments described in the manual are performed with Instrument must be made inoperative and be secured against Provided with a protective earth contact. Any interruption This product is a Safety Class I instrument provided with aProtective earthing ground incorporated in the power cord Mains plug shall only be inserted in a socket outlet Consumables Lifting and Handling Product Markings Certification Declaration of Conformity Price upon prompt return of the product Defects in material and workmanship when properly installedLike-new Its programming instructions due to such defects Chapter Assistance Regional Sales and Service Office s Power Cables Power CablesStraight/90 8120-1692 Inches, mint gray Used in the following locations Peru Used in the following locations Switzerland Straight/90 8120-4754 Inches, dark gray JIS C 8303, 100 90 /Straight 8120-1351 Inches, mint gray LineNeutral Straight/90 Used in the following locations System Cabinets 8120-4379 Inches, jade gray 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 Changing the Test Set’s Display Using the cursor-control Knob or Screen Keys To change the measurement screen Changing the Control Fields Unit-of-Measure FieldTo change a unit-of-measure field To Change an underlined entry Underlined Entry Field To make a one-of-many choice One-of-Many Field Numeric-Entry Fields Numeric-Entry FieldTo change a value Hexadecimal Values Decimal Values How do I Verify that the Test Set is Operating Properly? Cdma Spectrum Operating Overview Operating Overview ADC Full Scale ADC FS Displaying Cdma Measurements Magnitude Error, Phase Error Selecting Code Domain Measurements Diagram RF Measurements Frequency Error, FrequencyTransmitter TXPower Displaying Analog Measurements SINAD, Distortion, SNR, AF Frequency, DC Level Measurement AF Anl In SettingDisplaying AF Measurements FM Deviation, AM Depth, AC 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 To set a reference Setting a Measurement Reference Averaging Measurements To use measurement averagingHow the Test Set Averages Measurements To set an RF Offset Setting an RF Generator/Analyzer Offset Press Recall Saving and Recalling Instrument SetupsTo save an instrument setup To recall an instrument setup Register Names Poweron SettingsTo remove clear an individual save register To clear all save registers Base Settings Memory ConsiderationsInstrument Hardware Changes Using Pre-Defined User Keys Using User Keys To assign global user keys Assigning and Releasing User KeysTo assign local user keys To release local user keys Replacing Batteries Overview of the Test Set’s Overview of theTest Set’s Built-In Tools Using the RF Tools Program Software Menu Screen Loading and Running RF Tools Test Results/BTS Utility Setup Screens Test Results/BTS Utility Setup To use a printer for data collection Making the Measurement Swept GainTo use a laptop interface other than the BTS Laptop Utility Measurement Description 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 Discrete Frequency Insertion Loss Specifications Press k1 Proceed when you are finished with this screen. Particular testSecond display is enlarged for easier reading 10 Selecting the Swept Insertion Loss Measurement Swept Insertion Loss 11 Swept Insertion Loss Setups Estimating Swept Insertion Loss Using a Single Connection Swept Return Loss Select Main Menu Swept Return Loss 13 Swept Return Loss Setups Power level. To avoid damage to the ANT in port, enter an 14 Example of a Swept Return Loss Plot Screen Specifications Locations by viewing it in units of distance Cable FaultTest Signal Can Cause Interference Time domain can be used to find the physical distances. Select Main Menu Cable Fault Measurement K1 HELIAX, k3 RG, or k5 Custom Greatest accuracy is obtained when you enter a cable lengthCable length, enter a value 1.5 times the estimated length Toggles the selection between feet and meters 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 21 Transfer Stored Data Screen Transfer Stored Data 22 SA Self Calibration OFF/ON Screen SA Spectrum Analyzer Self Calibration ON/OFF Catalog PC Memory Card 23 Catalog Memory Card Screen Selecting the Code Domain Analyzer’s Controls Menus Using the Code Domain Analyzer 24 Code Domain Analyzer Menus IS-95 25 Code Domain Analyzer Menus IS-2000 Automatic Calibration Using the Spectrum AnalyzerSetting Resolution Bandwidth and Sweep Rate Relationship between Span, Resolution Bandwidth, and Sweep 26 Spectrum Analyzer Controls Menus Selecting the Spectrum Analyzer’s Controls Menus Using the Spectrum Analyzer’s Delta Markers Delta FrequencyDelta Level Reference Marker Ref Mrkr Level and Frequency Displaying the Spectrum Analyzer Mask Using the Spectrum Analyzer Mask Point Level Frequency Settings for mask in FigureDefining the Fixed Mask’s Limits Point Defining the Relative Mask’s Limits Turning Off the MaskTurning Off the Mask’s Failure Beeper AC Level Set to DC Level or AF Freq Set to match source Using the Voltmeter and Audio Frequency CounterSet to Audio Measuring AC and DC Voltages 29 Inputs and Filters for the Oscilloscope Using the Oscilloscope Scope Selecting the Oscilloscope’s Input Using the Oscilloscope’s Marker Selecting the Oscilloscope’s FiltersTriggering the Oscilloscope Copypl Using Ibutil Programs Securing aTest Procedure Clearing RAM Using the Listopts list options Program Using the Demo Program Step Using the Stplt store or plot Program Cdma Measurements Screens and Control Fields 130 Screens on which this measurement is displayed Average Power MeasurementsCdma Measurements Avg Pwr Chan Pwr Adjacent Channel Power MeasurementsChannel Power Measurements Screens on which this measurement is made Rho Rho Measurements 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 Measurements IS-95 Code Domain Power, IS-95 Code DOM Code Domain Analyzer, IS-95 only Selecting Absolute or Relative Code Domain Power, IS-95 only Fast Power Code Domain Phase PhseCode Domain Timing Timing Code Domain Measurements IS-2000 Advantages of Using IS-2000 Interpreting IS-2000 Channel Ordering Building a tree using the Bit Reverse method Channel numbers. The Walsh index utilizes Walsh orders 0 Available Measurements in the Code Domain 11 Code Domain Power, Bit Reverse Ordering Reading Code Domain Power, IS-2000 Code Domain Power, IS-2000 Code DOM Code Domain Analyzer, IS-2000 Code Domain Power & Noise Code Domain Fast Power Synchronize Code Domain Complex Power PN Offset Search IQ Constellation Diagram, IS-2000 only ACP Fltr BW Control Fields for Cdma Measurements# of Frames ACP Cal Code DOM Code Domain Analyze screen gain controls menu ACP OffsetADCfs or ADC FS Amplitude COD DOM Code Domain Analyzer main controls menu Analyzer Cdma analyzerAnalyzer code domain analyzer Anl Dir Chan Num Anl SpecialAuto Zero Carrier FT or Carrier Feedthru 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 Special Gen Mode Code DOM Code Domain Analyzer gain controls menu Input AttenInput Port Lvl Meas Intvl or Meas Int Power LevelMarker Lvl Marker Pos Num Avgs COD DOM Code Domain Analyzer fast power setup controls menuMeas Order Measurement Output Port Phase/divCOD DOM Code Domain Analyzer FP setup controls menu Ofs Trnsfer Phse PN IncrmentPN Offset Pwr Gain PN Offset or PN Ofs Pwr Scale IS-2000 Pwr IntvlPwr Ref Pwr Scale IS-95 Qual Event Pwr Zero Code DOM Code Domain Analyzer trigger controls menu Rate RC-3Rate RC-4 Rate RC-5 Screens on which this field is displayed RF ChannelRF Gen Freq RF In/Ant Sprd Fact Spread Factor Start FrameThreshold Time/div Time Time Ofs Time Offset Tune Freq Trig Event Walsh Order Walsh Chan Control Fields 178 Analog Measurements AC ControlAM Depth Measurement DC Level Measurement AF Freq Measurement FM Deviation Measurement Distn Distortion Measurement Frequency Measurement Frequency Error Measurement TX Power Measurement Is signal to noise ratio of the audio input signal Sinad MeasurementSNR Measurement AF Anl Signaling Decoder All ModesControl Fields for Analog Measurements #Pts AFGen1 Freq AF Cnt Gate AFGen2 Freq AFGen1 To AFGen2 To Signaling Encoder All Modes Spec ANL RF generator controls menu Atten Hold Scope trigger controls menu Audio In LoAudio Out Auto/Norm Center Freq Spec ANL all menus except mask controlsSpec ANL main controls menu De-Emphasis Cont/SingleDC FM Zero De-Emp Gain Detector DisplayDetector Types EditPt Edit Mask Ext Load R Ext TTLFilter FM Coupling Freq Delta Mrkr Freq maskReference Marker Frequency Level Delta Marker Normal Marker Frequency Level Spec ANL all menus when in normal mode except mask controlsFreq normal marker Freq Ref Mrkr If Filter Gain Cntl Spec ANL auxiliary controls menu Input Gain Internal Level div Level maskLvl Delta Mrkr Lvl marker Lvl normal markerScope all control menus Scope marker controls menu Lvl Ref MrkrMarker To Peak+ Marker To Peak Spec ANL marker controls menu Marker ToMask Beep Mask Type No Pk/Avg Mod In To Norm/Delta Normalize 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 This field selects the input port for the spectrum analyzer Maximum signal levels are printed on the connector panelKey or turn the Test Set off and on to reset it Spec ANL RF Gen controls menu Sensitivity RF analyzer Scope To Settling Sensitivity spectrum analyzer Sets the span of frequencies to be displayed on the screen SpanSpeaker ALC Speaker Vol Squelch Scope main controls menu Track/FixedThis field selects the horizontal sweep time per division Time-per-division is selected from a list of choices Resolution Trig-Delay TX Pwr Meas Vert/div TX Pwr Zero Vert Offset Configuration Screens 224 Turning Off User Messages Configuring the InstrumentSetting the Date and Time Changing the Beeper’s Volume Configuring for Printing a Screen Printing a ScreenTo interrupt printing Antenna Control Fields on the Configuration ScreensScreens Where Field is Present Abort Print Beeper Base Freq User Defined Call Chan Space User DefinedCdma Std 230 Command Escape Character Connection Time-outData Length Date Display User MessagesDuplex Out Firmware Ext RefFF at End FF at Start Frame Clock Output InaccessibleOUT connector Flow Control Gen-Anl User Defined Gen-Anl Hold-off Delay Gpib AdrsIbasic Echo Mode Incoming Call SecurityInst Echo Lines/Page Model Modem Configuration Modem Mode Modem Initialization/Configuration Parity Notch CouplNumber to Call Opt Cdma TB Print Title PasswordPrinter Adrs Printer Port Range Hold Ref Select Remote Mode RF Chan Std Retries RF Display RF Gen VoltsSee the RF Chan Std on page 244 for more information RF Level Offset RF In/Out Save/Recall RF Offset This field displays the serial number of the Test Set Serial BaudSerial9 Serial No Serial Port StatusStop Length Total RAM Signaling Encoder and Decoder Encoder Signaling Encoder and Decoder ScreensDecoder’s Signal Source Decoder Frequency Measurements AMPS-TACS, NAMPS-NTACS Encoder and Decoder Control and Voice Channel IdentifiersEncoder/Decoder Interaction Recc and AMPS-TACS RVC Measurements Decoder Mode DifferencesAMPS-TACS, NAMPS-NTACS Decoder Interpreting Decoded Data Decoding the Reverse Control Channel Recc Data Measure Field NAMPS-NTACS Reverse Voice Channel Measurements Decoding NAMPS-NTACS Reverse Voice Channel RVC Data Measurement Limits Dtmf Sequence Encoder and Decoder Decoding Considerations Function Generator Encoder and Decoder Bursts Control Fields for the Signaling Encoder and DecoderDelay Arm Meas Data hex Signaling Decoder Modes AMPS-TACS, NAMP-NTACBusy/Idle Channel Data Rate analog Signaling DecoderSignaling Encoder Data Level Signaling Encoder Modes NAMP-NTAC Signaling Decoder Modes NAMP-NTACDSAT/DST hex Data you enter here Filler Focc Frequency Gate TimeHi Tone De-emphasis Effects on Input Level Input Level Measure Examples of Input Level SettingsSignaling Decoder All Modes Lo Tone AMPS-TACS/NAMPS-NTACS Focc Message and Filler Data Format Message Focc Message FVC AMPS-TACS Signaling Encoder Modes AMPS-TACS Message/DST FVC Message FVC NAMPS-TACS Off Time Signaling Decoder All Modes Signaling Encoder All ModesSignaling Encoder Modes Dtmf Signaling Decoder Modes Dtmf Num of Bits Inverted Operation On TimePolarity Normal Operation SAT Freq FVC Signaling Encoder Modes DtmfPre-Emp Recc Data hex Send Send Dsat FVCSend Filler Focc Single/Cont Send ModeSignaling Encoder Modes Func Gen Sine Units Encoder Operating Considerations StandardStop Decoder Operating Considerations Stop Meas Symbol Frequencies HzStop Dsat FVC Stop Filler Focc Signaling Decoder Modes AMPS-TACS, NAMP-NTAC, Func Gen Trigger Pattern binTrig Level Example TwistTwist and Pre-emphasis Interaction Examples of Twist and Pre-emphasis Interaction Waveform Connectors Operating Considerations Connectors ANT Audio Audio OUT Data EXT REF EXT Scope Trig Parallel Port Pin Assignments Parallel RF IN/OUT Pin Description Serial 9, 10,Serial Port Pin Assignments Serial Port Pin Assignments Video OUT Accessories, Manuals, Support Modifications Agilent Technologies Manuals English and Other Agilent Technologies AccessoriesAccessories External Monitor Order Description Number 1D5 High Stability Reference Agilent Technologies Test SoftwareOptions Number Description Support for Your Instrument Getting HelpCustomer Training Agilent Regional Sales and Service Offices Error Messages Example 11-2 For example General Information About Error MessagesPositive Numbered Error Messages Example 11-1 Positive numbered error messages take the form Example 11-3 For example Negative Numbered Error MessagesIbasic Error Messages Example 11-4 Ibasic error messages take the form Example Text only error messages take the form Gpib Error MessagesText Only Error Messages Example Gpib 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