Phase-Shift Keying PSK Modulation | Agilent Technologies U2761A

Features and Functions

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Phase-Shift Keying (PSK) Modulation

Phase-shift keying (PSK) is a form of digital modulation in which the phase of the carrier signal is discretely varied. You can configure the U2761A to “shift” its output phase between two preset phases using PSK. The rate at which the output shifts between the two phases is determined by the internal rate generator on the signal level. The following figure shows an example of the PSK modulation waveform.

PSK rate

PSK deviation

Figure 2-23PSK modulation waveform

To Select PSK Modulation

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

U2761A User’s Guide

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Agilent Technologies U2761A manual Phase-Shift Keying PSK Modulation, To Select PSK Modulation, PSK rate PSK deviation

Contents

User’s Guide U T I O N WA R N I N G Safety Symbols Performed by qualified personnels InstrumentUse the device with the cables provided Environment Conditions Regulatory Markings Affixed product label is shown as below Product Category Declaration of Conformity Regulatory Information for Australia/New Zealand This Guide… Contents Output Control Sweep Time Index List of Figures Trigger output pulse List of Tables Xviii Getting Started Introduction Various features of the U2761A Product Outlook Product at a GlanceTop View Bumpers Power inlet Fan Ventilation Pin backplane connector USB inletFront View Rear View Dimensions Without Bumpers Product Dimensions105.00 mm 175.00 mm 18.00 mm 25.00 mm 41.00 mm Dimensions With Bumpers117.00 mm 180.00 mm 15.00 mm Standard Purchase Items General Maintenance Inspection and MaintenanceInitial Inspection Electrical Check With Agilent VEE Pro, LabVIEW, or Microsoft Visual Studio Installation and ConfigurationInstallation Hard-disk space 1 GB Check Your System Install the IO Libraries Suite Install the Module Driver Install the Agilent Measurement Manager T E Proceeding Connect the Module to Your PC Getting Started Go to Start Control Panel and double-clickSystem Select Ignore to disable the warning message Getting Started Verify Your Module Connection Send Commands To This Instrument Launch Your Agilent Measurement Manager IO Control will launch automatically when you start your PC T E Description Pin Backplane Connector Pin Configuration Chassis Installation Triggering Pulse Waveform Introduction Output ConfigurationOutput Function 1Output functions Amplitude Limitation Function Limitation Waveform pattern selection Waveform parameters Soft Front Panel Operation 2Output frequency range Output FrequencyRemote Interface Operation Duty Cycle Limitations Function Limitations Limits Due to Output Termination Output AmplitudeOffset Voltage Limitations 4Panel view of the amplitude section Limits Due to Units Selection Limits Due to Amplitude DC Offset Voltage VOLTageOFFSet offset Output Units Output Termination OUTPutLOAD ohmsINFinity Limits Due to Frequency Duty Cycle Square WavesDuty Cycle APPLy command automatically sets the duty cycle to 50% 9Ramp wave duty cycles Symmetry Ramp Wave 11Panel view of the output section Output Control Example 1, To output a DC voltage Set Output Using Scpi Commands Example 2, To output a Sine wave Example 4, To output a Ramp wave Pulse Period Pulse Waveform 13Panel view of the pulse width section Pulse Width Duty Cycle = 100 ⋅ Pulse Width / Period Pulse Duty Cycle Example Generate Pulse Waveform Using Scpi Commands Modulating frequency AM depth Amplitude Modulation AMTo Select AM 15Panel view of AM Carrier Waveform 3Carrier frequency for AM Carrier Frequency Modulating Waveform Default modulating waveform is Sine wave Peak into a 50 Ω load Modulating Waveform FrequencyModulation Depth Generate AM Using Scpi Commands Modulating frequency FM deviation Frequency Modulation FMTo Select FM FMSTATe 0OFF1ON 4Carrier frequency for FM FMINTernalFUNCtion SINusoidSQUareRAMPNRAMpTRIangleUSER Frequency Deviation Generate FM Using Scpi Commands To Select PM Phase Modulation PMModulating frequency Phase deviation PMSTATe 0OFF1ON 5Carrier frequency for PM Default waveform is Sine wave Generate PM Using Scpi Commands Phase Deviation FSK rate Hop frequency Frequency-Shift Keying FSK ModulationTo Select FSK Modulation FSKeySTATe 0OFF1ON 6Carrier frequency for FSK FSK Carrier Frequency 7Hop frequency FSK Hop Frequency FSK Rate Generate FSK Modulation Using Scpi Commands PSK rate PSK deviation Phase-Shift Keying PSK ModulationTo Select PSK Modulation PSKeySTATe 0OFF1ON 8Carrier frequency for PSK PSK Carrier Frequency PSK Deviation PSK Rate Generate PSK Modulation Using Scpi Commands ASK rate Amplitude-Shift Keying ASK ModulationTo Select ASK Modulation ASKeySTATe 0OFF1ON 9Carrier frequency for ASK ASK Rate Generate ASK Modulation Using Scpi Commands Frequency Linear type Start frequency Stop frequency Frequency SweepTo Select Sweep 28Panel view of sweep Start Frequency and Stop Frequency Sweep Time Sweep Mode Sweep Trigger Source Set Frequency Sweep Using Scpi Commands Trigger Source Choices Triggering Manual Triggering Internal Triggering External Triggering Trigger Output Signal Trigger Input SignalTrigger Rising edge shown Trigger out 500 μs Rising edge shown OUTPutTRIGger 0OFF1ON OUTPutTRIGgerSLOPe POSitiveNEGative Set Triggering Using Scpi Commands To Create and Store an Arbitrary Waveform Arbitrary Waveforms Select the Arbitrary waveform function Start waveform editing process Exiting the waveform editor Characteristics and Specifications Operating Environment Product Characteristics Waveforms Product Specifications and Characteristics Ramp, Triangle External frequency reference Units Vpp, Vrms, dBm Resolution Digits±1% of settling ±5 mV ±10 mV @ Hi-Z ±5 V across open circuit Modulation Sweep Characteristics 102 U2761A User’s Guide Index PSK United States Tel 800 829