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Agilent Technologies E4406A manual Making the Waveform Time Domain Measurement, Purpose, Chapter

Models: E4406A

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Making the Waveform (Time Domain) Measurement

NOTE

Making Measurements

Making the Waveform (Time Domain) Measurement

Making the Waveform (Time Domain) Measurement

Purpose

The waveform measurement is a generic measurement for viewing the input signal waveforms in the time domain. This measurement is how the instrument performs the zero span functionality found in traditional spectrum analyzers. Also available under basic mode waveform measurements is an I/Q window, which shows the I and Q signal waveforms in parameters of voltage versus time. The advantage of having an I/Q view available while in the waveform measurement is that it allows you to view complex components of the same signal without changing settings or measurements.

The waveform measurement can be used to perform general purpose power measurements to a high degree of accuracy.

Measurement Method

The instrument makes repeated power measurements at a set frequency, similar to the way a swept-tuned spectrum analyzer makes zero span measurements. The input analog signal is converted to a digital signal, which then is processed into a representation of a waveform measurement. The measurement relies on a high rates of sampling to create an accurate representation of a time domain signal.

This measurement is available for use with both the RF input and baseband I/Q inputs. For details on Baseband I/Q operation see the section on “Using Baseband I/Q Inputs (Option B7C)” on page 151.”

Making the Measurement

The factory default parameters provide a good starting point.You may want to change some of the settings. Press Meas Setup, More (1 of 2), Restore Meas Defaults at any time to return all parameters for the current measurement to their default settings.

Press MEASURE, Waveform (Time Domain) to immediately make a waveform (time domain) measurement.

To change any of the measurement parameters from the factory default values, refer to the “Changing the Measurement Setup” section for this measurement.

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Chapter 4

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Agilent Technologies E4406A Making the Waveform Time Domain Measurement, Purpose, Measurement Method, Making Measurements

Contents

Transmitter Tester User’s GuideAgilent Technologies E4406A VSA Series Safety Information EXCLUSIVE REMEDIES WarrantyLIMITATION OF WARRANTY Page Getting Started ContentsUsing System Features 4. Making Measurements Contents3.Setting the Mode Contents Changing the Measurement Setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 133 Changing the Display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 135 Using the Marker . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 135 Troubleshooting Hints . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 135 Making the Power Stat CCDF Measurement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 136 Purpose . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 136 Measurement Method . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 136 Making the Measurement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 137 Results . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 137 Changing the Measurement Setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 138 Changing the View . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 139 Changing the Display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 139 Using the Markers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 140 Troubleshooting Hints . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 140 Service Measurements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 141 Timebase Frequency . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 142 Purpose . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 142 Measurement Method . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 142 Test Setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 142 Results . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 143 50 MHz Amplitude . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 144 Purpose . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 144 Measurement Method . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 144 Test Setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 144 Results . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 145 Sensors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 146 Purpose . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 146 Measurement Method . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 146 Test Setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 146 Results . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 146 Front Panel Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 148 Purpose . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 148 Test Setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 148 Results . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 149 Troubleshooting Hints . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 149 Service Power vs. Time Measurement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 150 Purpose . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 150 Using Baseband I/Q Inputs Option B7C . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 151 What are Baseband I/Q Inputs? . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 152 What are Baseband I/Q Signals? . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 153 Why Make Measurements at Baseband?. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 153 Making Measurements with Baseband I/Q Inputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 154 Baseband I/Q Measurement Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 155 Selecting Input Probes for Baseband Measurements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 156 Selecting Baseband I/Q Inputs. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 159 Selecting Baseband I/Q Input Connectors. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 159 Setting Up Baseband I/Q Inputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 161 Baseband I/Q Measurement Views . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 165 Baseband I/Q Measurement Result Examples6. Options and Accessories Contents5. If You Have a Problem List of Keys List of Keys Front Panel TestList of Keys ReferenceList of Keys Getting Started Topics include Part Description TableStandard Documentation Measurement Option TablePersonality Documentation Part DescriptionDescription URL for the Latest VSA Transmitter Tester UpdateUnderstanding Digital Communications Measurements Agilent PartChapter Updating the FirmwareGetting Started Step Making a MeasurementSetup Keys Primary KeyFront Panel Keys Context Dependency SystemMeas View/Setup Trace Service GSM cdmaOne Waveform Time DomainSpectrum Freq Domain Spurious Close Channel Power MEASURESetupMarker Channel PowerSetup Getting StartedMeas View/Setup Trace Service GSM cdmaOne Waveform Time DomainSpectrum Freq Domain Spurious Close Channel Power MEASURESetupFront Panel Description 2.Control keysGetting Started Front Panel Description Chapter6.Mode keys select the measurement mode and mode parameters See page 83 for more detail Getting Started Front Panel Description Chapter12.Floppy Disk Drive. The floppy disk drive accepts 1.44 megabyte disks. For an explanation of the operation of the floppy disc drive see the Using Print Keys section on page be implemented with a future firmware update Chapter Rear Panel DescriptionGetting Started Rear Panel Description measurements. The external trigger accepts an 11. PARALLEL The PARALLEL connection supports remote printing Display Annotation Measurement Bar. Displays information about ESec even second clock - The green ESec Installing Optional Measurement Personalities Available Personality OptionsKey Path Loading the Optional PersonalityRequired Information Available Personality OptionsViewing a License Key Installing a License Key Using the Uninstall KeyPage Figure 1-6HP F1047-80002Cable Cables for Connecting to the Serial Port RS-232Figure 1-5HP 24542U Cable Figure Cables for Connecting to the Serial Port RS-232Figure 1-7HP 24542G/H Cable HP 92219J CableFigure 1-11HP C2913A/C2914A Cable Cables for Connecting to the Serial Port RS-232Figure 1-10HP 24542M Modem Cable Figure 1-12Mouse Adapter typicalFigure 1-14HP 24542U Cable with 5181-6640Adapter Cables for Connecting to the Serial Port RS-232Figure 1-13HP 24542U Cable with 5181-6641Adapter Figure 1-15HP 24542U Cable with 5181-6642AdapterFigure 1-16HP 24542U Cable with 5181-6639Adapter Figure 1-19HP F1047-80002Cable with 5181-6642Adapter Safety Considerations Instrument InstallationInstrument Operation and Maintenance Safety Considerations for Service Personnel Getting Started Safety Considerations ChapterUsing System Features Using System Keys Install and UninstallTable Key LocationsKey Access Locations Chapter Using System FeaturesKey Locations Using System Features Key Access LocationsTable Key Access PathKey Access Path Key Access LocationsUsing System Features Key Locations TableKey Access Path Key Access LocationsUsing System Features Key Locations TableKey Access Path Key Access LocationsUsing System Features TableKey Access Path Key Access LocationsUsing System Features Key LocationsInput/Input Port Using System FeaturesKey Locations ChapterUsing System Features Key Locations ChapterKey Access Path Key Access LocationsUsing System Features Key LocationsUsing Print and Print Setup Functions Printing a Displayed ScreenFront Panel Key language default towhen Color Print is set to LevelChapter Using System FeaturesUsing Print and Print Setup Functions shown below are selectedthe six screen files available only whenSaving a State Using File and Save KeysLoading a State Level Using the Alpha Editor KeysLevel LevelUsing Input/Output Configuration Keys Configuring I/O•SCPI LAN - Accesses the following keys Front Panel File SystemReference Level•10 MHz Out - Activates, or deactivates, the 10 MHz out signal on the rear panel of the instrument. The 10 MHz out can be used to lock other test equipment to the same frequency reference that is used by the transmitter tester. Once activated, the 10 MHz out feature is persistent, so if it is set to On it will remain on, even if the instrument has been preset, or powered off and then on Show Errors Using System Configuration and Alignment KeysRestore System Defaults features are described in the service guide Show SystemShow System Displays Using System FeaturesUsing System Configuration and Alignment Keys ChapterUsing System Configuration and Alignment Keys System LocalUsing System Features ChapterLevel AlignmentFront Levelremains constant Chapter Using System FeaturesUsing System Configuration and Alignment Keys Chapter Using System FeaturesUsing System Configuration and Alignment Keys Setting the Mode Chapter Selecting a ModeSetting the Mode Selecting a Mode Mode Setup Input KeysAdjust Input Attenuation and Input Power Adjust the IF Align SignalTrigger Keys •RF Burst Wideband •Video IF EnvlpSelecting the Frequency/Channel •Sync Source key menu4 Making Measurements Basic Measurements Preparing for Measurements Initial SetupUsing Measure Keys Averaging Measurement SetupMeasurement Control Voltage Avg - The voltage is averaged Trigger Source •Trace Display Changing the View•Typical Measurement Windows Span / X Scale Keys•Amplitude / Y Scale Keys Markers Using MarkersTrace Marker Functions Search MarkerMeasurement Method Making the Spectrum Frequency Domain MeasurementPurpose Making the MeasurementResults Table Changing the Measurement SetupSpectrum Frequency Domain Measurement Defaults Making Measurementsmeasurement data Auto Auto Peak - Select this to set the ADC range automatically to the peak signal level. Auto peak is a compromise that works well for both CW and burst signals Making the Spectrum Frequency Domain Measurement Changing the ViewMaking Measurements ChapterFigure 4-4Spectrum Measurement - I/Q Polar View Changing the Display Changing the Linear Spectrum DisplayChanging the I or Q Waveform Window Making Measurements Changing the I/Q Polar WindowSelecting Displayed Traces Within Windows Making the Spectrum Frequency Domain MeasurementUsing the Markers Measuring Band PowerMaking the Spectrum Frequency Domain Measurement Troubleshooting HintsMaking Measurements ChapterMeasurement Method Making the Waveform Time Domain MeasurementPurpose Making the MeasurementInput signal: cdma2000 Rev 8, SR1, 9 Channel ResultsChapter Making MeasurementsMaking the Waveform Time Domain Measurement Table Changing the Measurement SetupWaveform Time Domain Measurement Defaults In addition, the following parameters can be modified Chapter Making MeasurementsMaking the Waveform Time Domain Measurement Changing the View Meas Setup: View/Trace = I/Q Waveform View Changing the Display Figure 4-9Waveform Measurement - I/Q Polar ViewChapter Making MeasurementsMaking the Waveform Time Domain Measurement Using the Markers •Off - Allows you to turn off the selected markerTroubleshooting Hints differing values for the maximum pointPurpose Making the Adjacent Channel Power ACP MeasurementMaking the Adjacent Channel Power ACP Measurement Measurement MethodResults ACP Setup RecommendationMaking the Measurement TableMaking the Adjacent Channel Power ACP Measurement Changing the Measurement SetupAdjacent Channel Power Measurement Defaults Figure 4-10ACP Measurement - Bar Graph ViewMaximum Making the Adjacent Channel Power ACP MeasurementMaking Measurements ChapterOffset A 750.000 kHz Offset B 1.98000 MHz Chapter Changing the View •Limit Test - Turns off the limit test functionMaking Measurements Making the Adjacent Channel Power ACP MeasurementFigure 4-11ACP Measurement - Spectrum View ChapterTroubleshooting Hints This adjacent channel power ratio measurement can reveal degraded or defective parts in the transmitter section of the UUT. The following examples are those areas to be checked furtherPurpose Making the Channel Power MeasurementMaking the Channel Power Measurement Measurement MethodResults Channel Power MeasurementMaking the Measurement FigureTable Changing the Measurement SetupChannel Power Measurement Defaults Page Changing the Display Using the MarkerTroubleshooting Hints Measurement Method Making the Power Stat CCDF MeasurementPurpose Results Power Statistics CCDF MeasurementMaking the Measurement FigureTable Changing the Measurement SetupPower Statistics CCDF Measurement Defaults Changing the Display Making the Power Stat CCDF MeasurementChanging the View Making Measurements•Off - Allows you to turn off the selected marker Using the MarkersTroubleshooting Hints Service Measurements Front Panel Test on page Pwr vs Time on pagePurpose Test SetupTimebase Frequency Measurement MethodWindow One Time Record Window Three Freq ErrorResults Window Two MagnitudePurpose 50 MHz AmplitudeTest Setup Measurement MethodWindow One RF Magnitude Window Three ErrorResults Window Two Cal MagnitudePurpose SensorsTest Setup Measurement MethodMaking Measurements Sensors ChapterPurpose Front Panel TestTest Setup Making Measurements Front Panel Test Troubleshooting HintsResults ChapterPurpose Service Power vs. Time MeasurementService Power vs. Time Measurement Making MeasurementsUsing Baseband I/Q Inputs Option B7C What are Baseband I/Q Inputs? What are Baseband I/Q Signals? Why Make Measurements at Baseband?Making Measurements with Baseband I/Q Inputs Making Measurements Baseband I/Q Measurement OverviewUsing Baseband I/Q Inputs Option B7C ChapterSelecting Input Probes for Baseband Measurements Chapter Using Baseband I/Q Inputs Option B7CMaking Measurements Table Agilent Probes - Balanced and UnbalancedSelecting Baseband I/Q Input Connectors Selecting Baseband I/Q Inputs•IF Align - Select to view the IF alignment signal. This signal is available as a diagnostic function, to check the operation of the alignment signal in the case of alignment failure. Once selected, a menu accessing the IF alignment signal parameters is available at the bottom of the Input menu. Either CW, comb, or pulse signals may be selected. Because the alignment signal is input at the IF frequency, it is displayed on any active Spectrum Freq Domain window, regardless of center frequency Table Setting Up Baseband I/Q InputsI/Q Range Settings by Displayed Unit of Measure I and Q TableI and Q Offset Increment vs. I/Q Range I/Q RangeChapter Using Baseband I/Q Inputs Option B7CMaking Measurements Selecting Baseband I/Q Input Impedance Baseband I/Q Measurement Views Spectrum Views and 0 Hz Center FrequencyWaveform Views for Baseband I/Q Inputs RF vs. Baseband I/Q Input Measurement Views, by Comparing RF and Baseband I/Q Measurement ViewsTable MeasurementBaseband I/Q Measurement Result Examples Channel Power MeasurementMaking Measurements Using Baseband I/Q Inputs Option B7CSpectrum Frequency Domain Measurement ChapterFigure 4-19Basic Mode Spectrum Linear View- Baseband I/Q Inputs Waveform Time Domain Measurement Table Baseband I/Q Key Access LocationsBaseband I/Q Key Access Locations Table Baseband I/Q Key Access LocationsUsing Baseband I/Q Inputs Option B7C Making MeasurementsBaseband I/Q - Spectrum I/Q Marker Query BbIQ Programming CommandsCALCulate Subsystem Baseband I/Q - Waveform I/Q Marker QuerySets the amplitude reference level for the y-axis Baseband I/Q - IQ Offset CalibrationDISPlay Subsystem Spectrum - Y-AxisScale/Div Spectrum - Y-AxisReference LevelBaseband I/Q - Select Input Impedance Reference INPut SubsystemBaseband I/Q - Select Input Impedance Baseband I/Q - Activate IQ AlignmentMEASure Subsystem Baseband I/Q - Select I/Q Voltage Range SENSe Subsystem Select the Input SignalBaseband I/Q - Select I/Q Power Range 5 If You Have a Problem Instrument Messages and Functional Tests documentProblem Symptoms and Solutions Key or Feature Does Not Appear in MenuIf You Have a Problem LAN External Loopback Test Failed - Error MessageInstrument Fails Alignment - Error Message Problem Symptoms and SolutionsInstrument Keyboard is Locked Instrument Power-OnProblemLAN Communication Problem Chapter Support, Services, and AssistanceAgilent Technologies Test and Measurement Asia Call Center Numbers Returning Your Instrument to Agilent TechnologiesTable 5-1Contacting Agilent Options and Accessories Option BAC: cdmaOne Measurement Personality Options and Measurement PersonalitiesOption BAH: GSM Measurement Personality Option BAE: NADC/PDC Measurement PersonalitiesOption B78: cdma2000 Measurement Personality Option HN1: iDEN Measurement PersonalityOption BAF W-CDMAMeasurement Personality Option B7C: Baseband IQ Measurement Personality Option 202: EDGE with GSM Measurement PersonalityOption 300: 321.4 MHz IF Output Option 0B1: Additional Copy of ManualsOption 1CM Rack Mount Kit Option 0BV: Component-levelService DocumentationOption 0BW: Assembly-levelService Documentation Option 1CN Handles KitAC Probe AccessoriesBroadband Preamplifiers and Power Amplifiers GPIB CableModel Number N2714A Calibration and Adjustment SoftwareRS-232Cables DescriptionNumerics IndexIndex Index Indexoff, 140 select, 140 shape, 140 trace, IndexIndex Index Indexstate Index Index