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Agilent Technologies U2761A manual Frequency Deviation, Modulating Waveform Frequency

Models: U2761A

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Features and Functions

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Modulating Waveform Frequency

The range of the modulating waveform frequency is 2 mHz to 20 kHz. The default modulating waveform frequency is 100 Hz.

Soft Front Panel Operation

On the Mod Frequency panel as shown in Figure 2- 18, input the desired modulating frequency value and select the unit from the drop down list.

Remote Interface Operation

FM:INTernal:FREQuency {<frequency>}

Frequency Deviation

The frequency deviation setting represents the peak variation in frequency of the modulated waveform from the carrier frequency.

The range of the frequency deviation is 1 Hz to 500 kHz (limited to 100 kHz minus 1 μHz for Ramp and Arbitrary waveforms). The default frequency deviation is 100 Hz.

The carrier frequency must always be greater than or equal to the frequency deviation plus 1 μHz. If you attempt to set the deviation to a value plus 1 μHz greater than the carrier frequency (with FM enabled), the U2761A will automatically adjusts the deviation to the maximum value allowed with the present carrier frequency.

The sum of the carrier frequency and deviation must be less than or equal to the maximum frequency for the selected function (20 MHz for Sine and Square, and 200 kHz for Ramp and Arbitrary waveforms). If you attempt to set the deviation to a value that is not valid, the U2761A will automatically adjusts it to the maximum value allowed with the present carrier frequency.

U2761A User’s Guide

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Agilent Technologies U2761A manual Frequency Deviation, Modulating Waveform Frequency, Soft Front Panel Operation

Contents

Agilent Technologies Agilent U2761A USB Modular Function/Arbitrary Waveform GeneratorUser’s Guide Safety Notices WarrantyNotices C A U T I O NU2761A User’s Guide Safety SymbolsWARN IN G General Safety InformationC A U T I O N Do not operate the product in an explosive atmosphere or in theU2761A User’s Guide Environment ConditionsRequirements Regulatory Markings U2761A User’s Guide Waste Electrical and Electronic Equipment WEEE Directive 2002/96/ECDo not dispose in domestic household waste VIII Declaration of ConformityU2761A User’s Guide StandardAdditional Information U2761A User’s Guide1Performance Criteria Regulatory Information for Canada3 Characteristics and Specifications 2 Features and FunctionsIn This Guide… 1 Getting StartedInstallation ContentsChassis Installation XVIIFeatures and Functions ContentsPhase Deviation Phase Modulation PMContents To Select PMIndex Product Specifications and CharacteristicsContents 3 Characteristics and SpecificationsAM waveform List of FiguresFM waveform PM waveformU2761A User’s Guide List of Tables Table 1-1 Synchronous Simultaneous Interface SSI connectorU2761A User’s Guide Carrier frequency for PSKU2761A User’s Guide XVIIIAgilent U2761A USB Modular Function Generator User’s Guide Getting StartedAgilent Technologies 1 Getting Started Various features of the U2761AIntroduction Product Outlook Product at a GlanceTop View U2761A User’s GuideRear View Front ViewUSB indicator Power indicator 10 MHz reference connector Trigger in connector Output connector Trigger out connectorDimensions Without Bumpers Product DimensionsTop View Front ViewTop View Dimensions With BumpersFront View 1 Getting StartedU2761A User’s Guide Standard Purchase ItemsGeneral Maintenance Inspection and MaintenanceInitial Inspection Electrical CheckInstallation Installation and ConfigurationN O TE U2761A User’s GuideHard-disk space 1 GB A. Check Your System1 Getting Started N O TE B. Install the IO Libraries SuiteN O TE U2761A User’s Guide1 Getting Started C. Install the Module DriverN O TE U2761A User’s Guide D. Install the Agilent Measurement Manager10 Fill in the Customer Information Form accordingly and click Next N O TE1 Getting Started N O TE E. Connect the Module to Your PCYes, this time only and click Next to proceed U2761A User’s GuideU2761A User’s Guide 1 Getting StartedN O TE Select Ignore to disable the warning messagefollow the instructions below Go to Start Control Panel and double-click System8 The Assign USB device alias window will appear. Each time the U2761A is plugged in, this dialog box will appear. To 1 Getting StartedU2761A User’s Guide F. Verify Your Module ConnectionN O TE 1 Getting Started Send Commands To This InstrumentN O TE G. Launch Your Agilent Measurement ManagerDouble-click the Measurement Manager software icon on softwareN O TE For more information on how to use the Measurement Manager, refer to1 Getting Started the Agilent Measurement Manager help fileSSI timing signal 55-Pin Backplane Connector Pin ConfigurationU2761A User’s Guide Getting Started1 Getting Started Chassis InstallationOutput Configuration Features and FunctionsPhase Modulation PM Phase-Shift Keying PSK ModulationIntroduction Output ConfigurationOutput Function 2 Features and FunctionsU2761A User’s Guide Function LimitationAmplitude Limitation 2 Features and Functions Soft Front Panel OperationWaveform pattern selection Waveform parameters Figure 2-1 U2761A soft front panelU2761A User’s Guide Output FrequencyRemote Interface Operation Duty Cycle Limitations Function Limitations2 Features and Functions Soft Front Panel OperationOffset Voltage Limitations Output AmplitudeLimits Due to Output Termination The default amplitude is 1 Vpp into 50 Ω for all functions2 Features and Functions Limits Due to Units SelectionSoft Front Panel Operation Figure 2-4 Panel view of the amplitude sectionLimits Due to Amplitude DC Offset VoltageThe default offset is 0 V for all functions Remote Interface OperationSoft Front Panel Operation 2 Features and FunctionsRemote Interface Operation Figure 2-5 Panel view of the DC offset sectionSoft Front Panel Operation Output UnitsRemote Interface Operation VOLTageUNIT VPPVRMSDBM2 Features and Functions Output TerminationRemote Interface Operation Soft Front Panel OperationFigure 2-6 Panel view of the Tools menu U2761A User’s GuideDuty Cycle Duty Cycle Square WavesLimits Due to Frequency 2 Features and FunctionsRemote Interface Operation Soft Front Panel OperationFigure 2-8 Panel view of the duty cycle section U2761A User’s Guide2 Features and Functions Symmetry Ramp WaveSoft Front Panel Operation 0% SymmetryRemote Interface Operation Output ControlSoft Front Panel Operation Figure 2-11 Panel view of the output section2 Features and Functions Set Output Using SCPI CommandsRemote Interface Operation Example 1, To output a DC voltageU2761A User’s Guide Example 2, To output a Sine waveExample 3, To output a Square wave Example 4, To output a Ramp wave 2 Features and FunctionsPulse Period Pulse WaveformSoft Front Panel Operation Remote Interface Operation2 Features and Functions Pulse WidthSoft Front Panel Operation Remote Interface OperationSoft Front Panel Operation Pulse Duty CycleRemote Interface Operation Duty Cycle = 100 ⋅ Pulse Width / PeriodExample Generate Pulse Waveform Using SCPI Commands2 Features and Functions U2761A User’s Guide Amplitude Modulation AMTo Select AM 2 Features and Functions Carrier WaveformSoft Front Panel Operation Remote Interface OperationRemote Interface Operation Carrier FrequencyFigure 2-16 Panel view of the Arbitrary waveform Table 2-3 Carrier frequency for AM2 Features and Functions Modulating WaveformThe default modulating waveform is Sine wave Soft Front Panel OperationModulation Depth Modulating Waveform Frequencydefault modulation depth is 100% N O TEExample Generate AM Using SCPI Commands2 Features and Functions U2761A User’s Guide Frequency Modulation FMTo Select FM Carrier Waveform 2 Features and FunctionsSoft Front Panel Operation Remote Interface OperationRemote Interface Operation Carrier FrequencyTable 2-4 Carrier frequency for FM U2761A User’s GuideModulating Waveform 2 Features and FunctionsSoft Front Panel Operation Remote Interface OperationModulating Waveform Frequency Frequency DeviationSoft Front Panel Operation Remote Interface Operation2 Features and Functions Generate FM Using SCPI CommandsSoft Front Panel Operation Remote Interface OperationU2761A User’s Guide Phase Modulation PMTo Select PM Carrier Waveform 2 Features and FunctionsSoft Front Panel Operation Remote Interface OperationRemote Interface Operation Carrier FrequencySoft Front Panel Operation Remote Interface OperationThe default waveform is Sine wave 2 Features and FunctionsModulating Waveform Modulating Waveform FrequencyGenerate PM Using SCPI Commands Phase Deviation0 to 360 . The default phase deviation setting is Soft Front Panel Operation2 Features and Functions Frequency-Shift Keying FSK ModulationTo Select FSK Modulation Soft Front Panel Operation Carrier WaveformRemote Interface Operation Soft Front Panel Operation2 Features and Functions FSK Carrier FrequencyRemote Interface Operation Soft Front Panel OperationSoft Front Panel Operation FSK “Hop” FrequencyRemote Interface Operation frequency is 100 Hz for all functionsFSK Rate Generate FSK Modulation Using SCPI Commands2 Features and Functions Soft Front Panel OperationU2761A User’s Guide Phase-Shift Keying PSK ModulationTo Select PSK Modulation Carrier Waveform 2 Features and FunctionsSoft Front Panel Operation Remote Interface OperationRemote Interface Operation PSK Carrier FrequencySoft Front Panel Operation Remote Interface OperationPSK Deviation PSK Rate2 Features and Functions Soft Front Panel OperationU2761A User’s Guide Generate PSK Modulation Using SCPI CommandsExample 2 Features and Functions Amplitude-Shift Keying ASK ModulationTo Select ASK Modulation Soft Front Panel Operation Carrier WaveformRemote Interface Operation Soft Front Panel OperationCarrier Frequency 2 Features and FunctionsRemote Interface Operation Soft Front Panel OperationASK Rate Generate ASK Modulation Using SCPI CommandsSoft Front Panel Operation Remote Interface OperationTo Select Sweep Frequency Sweep2 Features and Functions Soft Front Panel OperationRemote Interface Operation Start Frequency and Stop FrequencySoft Front Panel Operation Figure 2-28 Panel view of sweepSweep Time Sweep Mode2 Features and Functions Remote Interface OperationSoft Front Panel Operation Sweep Trigger SourceRemote Interface Operation Soft Front Panel Operation2 Features and Functions Set Frequency Sweep Using SCPI CommandsRemote Interface Operation ExampleTrigger Source Choices TriggeringSoft Front Panel Operation U2761A User’s GuideManual Triggering Internal Triggering2 Features and Functions Remote Interface OperationRemote Interface Operation External TriggeringSoft Front Panel Operation Remote Interface OperationTrigger Output Signal Trigger Input Signal2 Features and Functions Trigger in Rising edge shown Figure 2-29 Trigger input pulseRemote Interface Operation Soft Front Panel Operationfalling edge, select Positive for rising edge and U2761A User’s GuideExample Set Triggering Using SCPI Commands2 Features and Functions U2761A User’s Guide Arbitrary WaveformsTo Create and Store an Arbitrary Waveform 1 Select the Arbitrary waveform function 2 Features and Functions2 Set the waveform period 3 Set the waveform voltage limits7 Sending waveform to the U2761A 6 Start waveform editing process8 Saving the waveform 9 Exiting the waveform editorU2761A User’s Guide 2 Features and FunctionsProduct Characteristics Product Specifications and Characteristics Characteristics and SpecificationsAgilent Technologies Agilent U2761A USB Modular Function Generator User’s Guide3 Characteristics and Specifications Product CharacteristicsPOWER CONSUMPTION SAFETY COMPLIANCEWAVEFORM CHARACTERISTICS Sine Product Specifications and CharacteristicsWAVEFORMS SquarePulse Ramp, TriangleArbitrary 3 Characteristics and SpecificationsDC offset COMMON CHARACTERISTICS AmplitudeMain output Internal frequency reference3 Characteristics and Specifications MODULATION AMTRIGGER CHARACTERISTICS Trigger input SWEEP CHARACTERISTICSTrigger output U2761A User’s GuideU2761A User’s Guide 3 Characteristics and SpecificationsU2761A User’s Guide Indexlimits phase noise PML-Mount kit 7 offset. Refer to DC offsetAgilent Technologies, Inc First Edition, April 30 U2761-90000