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Agilent Technologies U2761A manual Frequency-Shift Keying FSK Modulation, To Select FSK Modulation

Models: U2761A

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2 Features and Functions

Frequency-Shift Keying (FSK) Modulation

FSK is similar to FM except that the frequency alternates between two preset values. You can configure the U2761A to “shift” its output frequency between two preset values using FSK modulation. An example of the FSK modulation waveform is shown below. The rate at which the output shifts between the two frequencies (called the “carrier frequency” and the “hop frequency”) is determined by the internal rate generator.

FSK rate

Hop frequency

Figure 2-21FSK modulation waveform

To Select FSK Modulation

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

66	U2761A User’s Guide

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Agilent Technologies U2761A manual Frequency-Shift Keying FSK Modulation, To Select FSK Modulation, Features and Functions

Contents

Agilent U2761A USB Modular Function/Arbitrary Waveform Generator User’s GuideAgilent Technologies Warranty Safety NoticesNotices C A U T I O NSafety Symbols U2761A User’s GuideGeneral Safety Information WARN IN GC A U T I O N Do not operate the product in an explosive atmosphere or in theEnvironment Conditions RequirementsU2761A User’s Guide Regulatory Markings Waste Electrical and Electronic Equipment WEEE Directive 2002/96/EC Do not dispose in domestic household wasteU2761A User’s Guide Declaration of Conformity VIIIU2761A User’s Guide StandardU2761A User’s Guide Additional Information1Performance Criteria Regulatory Information for Canada2 Features and Functions 3 Characteristics and SpecificationsIn This Guide… 1 Getting StartedContents InstallationChassis Installation XVIIContents Features and FunctionsPhase Modulation PM Phase DeviationContents To Select PMProduct Specifications and Characteristics IndexContents 3 Characteristics and SpecificationsList of Figures AM waveformFM waveform PM waveformU2761A User’s Guide Table 1-1 Synchronous Simultaneous Interface SSI connector List of TablesU2761A User’s Guide Carrier frequency for PSKXVIII U2761A User’s GuideGetting Started Agilent TechnologiesAgilent U2761A USB Modular Function Generator User’s Guide Various features of the U2761A Introduction1 Getting Started Product at a Glance Product OutlookTop View U2761A User’s GuideFront View Rear ViewUSB indicator Power indicator 10 MHz reference connector Trigger in connector Output connector Trigger out connectorProduct Dimensions Dimensions Without BumpersTop View Front ViewDimensions With Bumpers Top ViewFront View 1 Getting StartedStandard Purchase Items U2761A User’s GuideInspection and Maintenance General MaintenanceInitial Inspection Electrical CheckInstallation and Configuration InstallationN O TE U2761A User’s GuideA. Check Your System 1 Getting StartedHard-disk space 1 GB B. Install the IO Libraries Suite N O TEN O TE U2761A User’s GuideC. Install the Module Driver N O TE1 Getting Started D. Install the Agilent Measurement Manager U2761A User’s GuideN O TE 1 Getting Started10 Fill in the Customer Information Form accordingly and click Next E. Connect the Module to Your PC N O TEYes, this time only and click Next to proceed U2761A User’s Guide1 Getting Started U2761A User’s GuideSelect Ignore to disable the warning message N O TEfollow the instructions below 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. ToF. Verify Your Module Connection N O TEU2761A User’s Guide Send Commands To This Instrument 1 Getting StartedG. Launch Your Agilent Measurement Manager N O TEDouble-click the Measurement Manager software icon on softwareFor more information on how to use the Measurement Manager, refer to N O TE1 Getting Started the Agilent Measurement Manager help file55-Pin Backplane Connector Pin Configuration SSI timing signalU2761A User’s Guide Getting StartedChassis Installation 1 Getting StartedFeatures and Functions Output ConfigurationPhase Modulation PM Phase-Shift Keying PSK ModulationOutput Configuration IntroductionOutput Function 2 Features and FunctionsFunction Limitation Amplitude LimitationU2761A User’s Guide Soft Front Panel Operation 2 Features and FunctionsWaveform pattern selection Waveform parameters Figure 2-1 U2761A soft front panelOutput Frequency Remote Interface OperationU2761A User’s Guide Function Limitations Duty Cycle Limitations2 Features and Functions Soft Front Panel OperationOutput Amplitude Offset Voltage LimitationsLimits Due to Output Termination The default amplitude is 1 Vpp into 50 Ω for all functionsLimits Due to Units Selection 2 Features and FunctionsSoft Front Panel Operation Figure 2-4 Panel view of the amplitude sectionDC Offset Voltage Limits Due to AmplitudeThe default offset is 0 V for all functions Remote Interface Operation2 Features and Functions Soft Front Panel OperationRemote Interface Operation Figure 2-5 Panel view of the DC offset sectionOutput Units Soft Front Panel OperationRemote Interface Operation VOLTageUNIT VPPVRMSDBMOutput Termination 2 Features and FunctionsSoft Front Panel Operation Remote Interface OperationFigure 2-6 Panel view of the Tools menu U2761A User’s GuideDuty Cycle Square Waves Duty CycleLimits Due to Frequency 2 Features and FunctionsSoft Front Panel Operation Remote Interface OperationFigure 2-8 Panel view of the duty cycle section U2761A User’s GuideSymmetry Ramp Wave 2 Features and FunctionsSoft Front Panel Operation 0% SymmetryOutput Control Remote Interface OperationSoft Front Panel Operation Figure 2-11 Panel view of the output sectionSet Output Using SCPI Commands 2 Features and FunctionsRemote Interface Operation Example 1, To output a DC voltageExample 2, To output a Sine wave Example 3, To output a Square waveU2761A User’s Guide 2 Features and Functions Example 4, To output a Ramp wavePulse Waveform Pulse PeriodSoft Front Panel Operation Remote Interface OperationPulse Width 2 Features and FunctionsSoft Front Panel Operation Remote Interface OperationPulse Duty Cycle Soft Front Panel OperationRemote Interface Operation Duty Cycle = 100 ⋅ Pulse Width / PeriodGenerate Pulse Waveform Using SCPI Commands 2 Features and FunctionsExample Amplitude Modulation AM To Select AMU2761A User’s Guide Carrier Waveform 2 Features and FunctionsSoft Front Panel Operation Remote Interface OperationCarrier Frequency Remote Interface OperationFigure 2-16 Panel view of the Arbitrary waveform Table 2-3 Carrier frequency for AMModulating Waveform 2 Features and FunctionsThe default modulating waveform is Sine wave Soft Front Panel OperationModulating Waveform Frequency Modulation Depthdefault modulation depth is 100% N O TEGenerate AM Using SCPI Commands 2 Features and FunctionsExample Frequency Modulation FM To Select FMU2761A User’s Guide 2 Features and Functions Carrier WaveformSoft Front Panel Operation Remote Interface OperationCarrier Frequency Remote Interface OperationTable 2-4 Carrier frequency for FM U2761A User’s Guide2 Features and Functions Modulating WaveformSoft Front Panel Operation Remote Interface OperationFrequency Deviation Modulating Waveform FrequencySoft Front Panel Operation Remote Interface OperationGenerate FM Using SCPI Commands 2 Features and FunctionsSoft Front Panel Operation Remote Interface OperationPhase Modulation PM To Select PMU2761A User’s Guide 2 Features and Functions Carrier WaveformSoft Front Panel Operation Remote Interface OperationCarrier Frequency Remote Interface OperationSoft Front Panel Operation Remote Interface Operation2 Features and Functions The default waveform is Sine waveModulating Waveform Modulating Waveform FrequencyPhase Deviation Generate PM Using SCPI Commands0 to 360 . The default phase deviation setting is Soft Front Panel OperationFrequency-Shift Keying FSK Modulation To Select FSK Modulation2 Features and Functions Carrier Waveform Soft Front Panel OperationRemote Interface Operation Soft Front Panel OperationFSK Carrier Frequency 2 Features and FunctionsRemote Interface Operation Soft Front Panel OperationFSK “Hop” Frequency Soft Front Panel OperationRemote Interface Operation frequency is 100 Hz for all functionsGenerate FSK Modulation Using SCPI Commands FSK Rate2 Features and Functions Soft Front Panel OperationPhase-Shift Keying PSK Modulation To Select PSK ModulationU2761A User’s Guide 2 Features and Functions Carrier WaveformSoft Front Panel Operation Remote Interface OperationPSK Carrier Frequency Remote Interface OperationSoft Front Panel Operation Remote Interface OperationPSK Rate PSK Deviation2 Features and Functions Soft Front Panel OperationGenerate PSK Modulation Using SCPI Commands ExampleU2761A User’s Guide Amplitude-Shift Keying ASK Modulation To Select ASK Modulation2 Features and Functions Carrier Waveform Soft Front Panel OperationRemote Interface Operation Soft Front Panel Operation2 Features and Functions Carrier FrequencyRemote Interface Operation Soft Front Panel OperationGenerate ASK Modulation Using SCPI Commands ASK RateSoft Front Panel Operation Remote Interface OperationFrequency Sweep To Select Sweep2 Features and Functions Soft Front Panel OperationStart Frequency and Stop Frequency Remote Interface OperationSoft Front Panel Operation Figure 2-28 Panel view of sweepSweep Mode Sweep Time2 Features and Functions Remote Interface OperationSweep Trigger Source Soft Front Panel OperationRemote Interface Operation Soft Front Panel OperationSet Frequency Sweep Using SCPI Commands 2 Features and FunctionsRemote Interface Operation ExampleTriggering Trigger Source ChoicesSoft Front Panel Operation U2761A User’s GuideInternal Triggering Manual Triggering2 Features and Functions Remote Interface OperationExternal Triggering Remote Interface OperationSoft Front Panel Operation Remote Interface OperationTrigger Input Signal Trigger Output Signal2 Features and Functions Trigger in Rising edge shown Figure 2-29 Trigger input pulseSoft Front Panel Operation Remote Interface Operationfalling edge, select Positive for rising edge and U2761A User’s GuideSet Triggering Using SCPI Commands 2 Features and FunctionsExample Arbitrary Waveforms To Create and Store an Arbitrary WaveformU2761A User’s Guide 2 Features and Functions 1 Select the Arbitrary waveform function2 Set the waveform period 3 Set the waveform voltage limits6 Start waveform editing process 7 Sending waveform to the U2761A8 Saving the waveform 9 Exiting the waveform editor2 Features and Functions U2761A User’s GuideCharacteristics and Specifications Product Characteristics Product Specifications and CharacteristicsAgilent Technologies Agilent U2761A USB Modular Function Generator User’s GuideProduct Characteristics 3 Characteristics and SpecificationsPOWER CONSUMPTION SAFETY COMPLIANCEProduct Specifications and Characteristics WAVEFORM CHARACTERISTICS SineWAVEFORMS SquareRamp, Triangle PulseArbitrary 3 Characteristics and SpecificationsCOMMON CHARACTERISTICS Amplitude DC offsetMain output Internal frequency referenceMODULATION AM 3 Characteristics and SpecificationsSWEEP CHARACTERISTICS TRIGGER CHARACTERISTICS Trigger inputTrigger output U2761A User’s Guide3 Characteristics and Specifications U2761A User’s GuideIndex U2761A User’s Guidephase noise PM limitsL-Mount kit 7 offset. Refer to DC offsetAgilent Technologies, Inc First Edition, April 30 U2761-90000