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Agilent Technologies U2761A manual Amplitude-Shift Keying ASK Modulation, To Select ASK Modulation

Models: U2761A

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2 Features and Functions

Amplitude-Shift Keying (ASK) Modulation

ASK is a form of digital modulation in which the modulating signal apply variations in the amplitude of a carrier signal. The amplitude of the carrier signal varies simultaneously with the modulating signal while phase and frequency remain constant. In other words, the carrier signal can be assumed as an on and off switch. You can configure the U2761A to “shift” its output amplitude between two preset amplitudes using ASK. The rate at which the output shifts between the two amplitudes is determined by the internal rate generator. An example of the ASK modulation waveform is shown in the following.

ASK rate

Figure 2-25ASK modulation waveform

To Select ASK Modulation

The U2761A allows only one modulation mode to be enabled at a time. The U2761A does not allow ASK to be enabled at the same time that sweep is enabled.

76	U2761A User’s Guide

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Agilent Technologies U2761A manual Amplitude-Shift Keying ASK Modulation, To Select ASK Modulation, Features and Functions

Contents

User’s Guide Agilent U2761A USB Modular Function/Arbitrary Waveform GeneratorAgilent Technologies Notices WarrantySafety Notices C A U T I O NSafety Symbols U2761A User’s GuideC A U T I O N General Safety InformationWARN IN G Do not operate the product in an explosive atmosphere or in theRequirements Environment ConditionsU2761A User’s Guide Regulatory Markings Do not dispose in domestic household waste Waste Electrical and Electronic Equipment WEEE Directive 2002/96/ECU2761A User’s Guide U2761A User’s Guide Declaration of ConformityVIII Standard1Performance Criteria U2761A User’s GuideAdditional Information Regulatory Information for CanadaIn This Guide… 2 Features and Functions3 Characteristics and Specifications 1 Getting StartedChassis Installation ContentsInstallation XVIIContents Features and FunctionsContents Phase Modulation PMPhase Deviation To Select PMContents Product Specifications and CharacteristicsIndex 3 Characteristics and SpecificationsFM waveform List of FiguresAM waveform PM waveformU2761A User’s Guide U2761A User’s Guide Table 1-1 Synchronous Simultaneous Interface SSI connectorList of Tables Carrier frequency for PSKXVIII U2761A User’s GuideAgilent Technologies Getting StartedAgilent U2761A USB Modular Function Generator User’s Guide Introduction Various features of the U2761A1 Getting Started Top View Product at a GlanceProduct Outlook U2761A User’s GuideUSB indicator Power indicator 10 MHz reference connector Front ViewRear View Trigger in connector Output connector Trigger out connectorTop View Product DimensionsDimensions Without Bumpers Front ViewFront View Dimensions With BumpersTop View 1 Getting StartedStandard Purchase Items U2761A User’s GuideInitial Inspection Inspection and MaintenanceGeneral Maintenance Electrical CheckN O TE Installation and ConfigurationInstallation U2761A User’s Guide1 Getting Started A. Check Your SystemHard-disk space 1 GB N O TE B. Install the IO Libraries SuiteN O TE U2761A User’s GuideN O TE C. Install the Module Driver1 Getting Started D. Install the Agilent Measurement Manager U2761A User’s Guide1 Getting Started N O TE10 Fill in the Customer Information Form accordingly and click Next Yes, this time only and click Next to proceed E. Connect the Module to Your PCN O TE U2761A User’s Guide1 Getting Started U2761A User’s Guidefollow the instructions below Select Ignore to disable the warning messageN O TE Go to Start Control Panel and double-click System1 Getting Started 8 The Assign USB device alias window will appear. Each time the U2761A is plugged in, this dialog box will appear. ToN O TE F. Verify Your Module ConnectionU2761A User’s Guide Send Commands To This Instrument 1 Getting StartedDouble-click the Measurement Manager software icon on G. Launch Your Agilent Measurement ManagerN O TE software1 Getting Started For more information on how to use the Measurement Manager, refer toN O TE the Agilent Measurement Manager help fileU2761A User’s Guide 55-Pin Backplane Connector Pin ConfigurationSSI timing signal Getting StartedChassis Installation 1 Getting StartedPhase Modulation PM Features and FunctionsOutput Configuration Phase-Shift Keying PSK ModulationOutput Function Output ConfigurationIntroduction 2 Features and FunctionsAmplitude Limitation Function LimitationU2761A User’s Guide Waveform pattern selection Waveform parameters Soft Front Panel Operation2 Features and Functions Figure 2-1 U2761A soft front panelRemote Interface Operation Output FrequencyU2761A User’s Guide 2 Features and Functions Function LimitationsDuty Cycle Limitations Soft Front Panel OperationLimits Due to Output Termination Output AmplitudeOffset Voltage Limitations The default amplitude is 1 Vpp into 50 Ω for all functionsSoft Front Panel Operation Limits Due to Units Selection2 Features and Functions Figure 2-4 Panel view of the amplitude sectionThe default offset is 0 V for all functions DC Offset VoltageLimits Due to Amplitude Remote Interface OperationRemote Interface Operation 2 Features and FunctionsSoft Front Panel Operation Figure 2-5 Panel view of the DC offset sectionRemote Interface Operation Output UnitsSoft Front Panel Operation VOLTageUNIT VPPVRMSDBMOutput Termination 2 Features and FunctionsFigure 2-6 Panel view of the Tools menu Soft Front Panel OperationRemote Interface Operation U2761A User’s GuideLimits Due to Frequency Duty Cycle Square WavesDuty Cycle 2 Features and FunctionsFigure 2-8 Panel view of the duty cycle section Soft Front Panel OperationRemote Interface Operation U2761A User’s GuideSoft Front Panel Operation Symmetry Ramp Wave2 Features and Functions 0% SymmetrySoft Front Panel Operation Output ControlRemote Interface Operation Figure 2-11 Panel view of the output sectionRemote Interface Operation Set Output Using SCPI Commands2 Features and Functions Example 1, To output a DC voltageExample 3, To output a Square wave Example 2, To output a Sine waveU2761A User’s Guide 2 Features and Functions Example 4, To output a Ramp waveSoft Front Panel Operation Pulse WaveformPulse Period Remote Interface OperationSoft Front Panel Operation Pulse Width2 Features and Functions Remote Interface OperationRemote Interface Operation Pulse Duty CycleSoft Front Panel Operation Duty Cycle = 100 ⋅ Pulse Width / Period2 Features and Functions Generate Pulse Waveform Using SCPI CommandsExample To Select AM Amplitude Modulation AMU2761A User’s Guide Soft Front Panel Operation Carrier Waveform2 Features and Functions Remote Interface OperationFigure 2-16 Panel view of the Arbitrary waveform Carrier FrequencyRemote Interface Operation Table 2-3 Carrier frequency for AMThe default modulating waveform is Sine wave Modulating Waveform2 Features and Functions Soft Front Panel Operationdefault modulation depth is 100% Modulating Waveform FrequencyModulation Depth N O TE2 Features and Functions Generate AM Using SCPI CommandsExample To Select FM Frequency Modulation FMU2761A User’s Guide Soft Front Panel Operation 2 Features and FunctionsCarrier Waveform Remote Interface OperationTable 2-4 Carrier frequency for FM Carrier FrequencyRemote Interface Operation U2761A User’s GuideSoft Front Panel Operation 2 Features and FunctionsModulating Waveform Remote Interface OperationSoft Front Panel Operation Frequency DeviationModulating Waveform Frequency Remote Interface OperationSoft Front Panel Operation Generate FM Using SCPI Commands2 Features and Functions Remote Interface OperationTo Select PM Phase Modulation PMU2761A User’s Guide Soft Front Panel Operation 2 Features and FunctionsCarrier Waveform Remote Interface OperationSoft Front Panel Operation Carrier FrequencyRemote Interface Operation Remote Interface OperationModulating Waveform 2 Features and FunctionsThe default waveform is Sine wave Modulating Waveform Frequency0 to 360 . The default phase deviation setting is Phase DeviationGenerate PM Using SCPI Commands Soft Front Panel OperationTo Select FSK Modulation Frequency-Shift Keying FSK Modulation2 Features and Functions Remote Interface Operation Carrier WaveformSoft Front Panel Operation Soft Front Panel OperationRemote Interface Operation FSK Carrier Frequency2 Features and Functions Soft Front Panel OperationRemote Interface Operation FSK “Hop” FrequencySoft Front Panel Operation frequency is 100 Hz for all functions2 Features and Functions Generate FSK Modulation Using SCPI CommandsFSK Rate Soft Front Panel OperationTo Select PSK Modulation Phase-Shift Keying PSK ModulationU2761A User’s Guide Soft Front Panel Operation 2 Features and FunctionsCarrier Waveform Remote Interface OperationSoft Front Panel Operation PSK Carrier FrequencyRemote Interface Operation Remote Interface Operation2 Features and Functions PSK RatePSK Deviation Soft Front Panel OperationExample Generate PSK Modulation Using SCPI CommandsU2761A User’s Guide To Select ASK Modulation Amplitude-Shift Keying ASK Modulation2 Features and Functions Remote Interface Operation Carrier WaveformSoft Front Panel Operation Soft Front Panel OperationRemote Interface Operation 2 Features and FunctionsCarrier Frequency Soft Front Panel OperationSoft Front Panel Operation Generate ASK Modulation Using SCPI CommandsASK Rate Remote Interface Operation2 Features and Functions Frequency SweepTo Select Sweep Soft Front Panel OperationSoft Front Panel Operation Start Frequency and Stop FrequencyRemote Interface Operation Figure 2-28 Panel view of sweep2 Features and Functions Sweep ModeSweep Time Remote Interface OperationRemote Interface Operation Sweep Trigger SourceSoft Front Panel Operation Soft Front Panel OperationRemote Interface Operation Set Frequency Sweep Using SCPI Commands2 Features and Functions ExampleSoft Front Panel Operation TriggeringTrigger Source Choices U2761A User’s Guide2 Features and Functions Internal TriggeringManual Triggering Remote Interface OperationSoft Front Panel Operation External TriggeringRemote Interface Operation Remote Interface Operation2 Features and Functions Trigger Input SignalTrigger Output Signal Trigger in Rising edge shown Figure 2-29 Trigger input pulsefalling edge, select Positive for rising edge and Soft Front Panel OperationRemote Interface Operation U2761A User’s Guide2 Features and Functions Set Triggering Using SCPI CommandsExample To Create and Store an Arbitrary Waveform Arbitrary WaveformsU2761A User’s Guide 2 Set the waveform period 2 Features and Functions1 Select the Arbitrary waveform function 3 Set the waveform voltage limits8 Saving the waveform 6 Start waveform editing process7 Sending waveform to the U2761A 9 Exiting the waveform editor2 Features and Functions U2761A User’s GuideAgilent Technologies Characteristics and SpecificationsProduct Characteristics Product Specifications and Characteristics Agilent U2761A USB Modular Function Generator User’s GuidePOWER CONSUMPTION Product Characteristics3 Characteristics and Specifications SAFETY COMPLIANCEWAVEFORMS Product Specifications and CharacteristicsWAVEFORM CHARACTERISTICS Sine SquareArbitrary Ramp, TrianglePulse 3 Characteristics and SpecificationsMain output COMMON CHARACTERISTICS AmplitudeDC offset Internal frequency referenceMODULATION AM 3 Characteristics and SpecificationsTrigger output SWEEP CHARACTERISTICSTRIGGER CHARACTERISTICS Trigger input U2761A User’s Guide3 Characteristics and Specifications U2761A User’s GuideIndex U2761A User’s GuideL-Mount kit 7 phase noise PMlimits offset. Refer to DC offsetAgilent Technologies, Inc First Edition, April 30 U2761-90000