Generate FM Using Scpi Commands | Agilent Technologies U2761A

2 Features and Functions

Soft Front Panel Operation

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

Remote Interface Operation

FM:DEViation <peak deviation in Hz>

Generate FM Using SCPI Commands

Example 1
-> CLS; RST	//To reset the U2761A to default
	power-on state, this command
	can be ignored if this operation
	is not required.
-> FM:STAT ON	//Enables FM.
-> FUNC SIN	//Sets the carrier waveform to
	Sine wave.
-> FREQ 1000	//Sets the carrier frequency to
	1 kHz.
-> VOLT 5 VPP	//Sets the output amplitude to
	5 Vpp.
-> VOLT:OFFS 0	//Sets the output offset to 0.
-> FM:INT:FUNC SIN	//Changes the modulating
	waveform shape to Sine wave.
-> FM:INT:FREQ 500	//Changes the modulating
	frequency to 500 Hz.
-> FM:DEV 100	//Changes the frequency
	deviation to 100 Hz.
-> OUTP ON	//Turns on output.

60	U2761A User’s Guide

Image 78

Agilent Technologies U2761A manual Generate FM Using Scpi Commands

Contents

User’s Guide U T I O N WA R N I N G Safety Symbols Instrument Use the device with the cables providedPerformed by qualified personnels Environment Conditions Regulatory Markings Product Category Affixed product label is shown as below 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 Various features of the U2761A Introduction Top View Product at a GlanceProduct Outlook Bumpers Front View Fan Ventilation Pin backplane connector USB inletPower inlet Rear View 105.00 mm 175.00 mm 18.00 mm Product DimensionsDimensions Without Bumpers 25.00 mm Dimensions With Bumpers 117.00 mm 180.00 mm 15.00 mm41.00 mm Standard Purchase Items Initial Inspection Inspection and MaintenanceGeneral Maintenance Electrical Check Installation and Configuration InstallationWith Agilent VEE Pro, LabVIEW, or Microsoft Visual Studio Check Your System Hard-disk space 1 GB Install the IO Libraries Suite Install the Module Driver Install the Agilent Measurement Manager T E Connect the Module to Your PC Proceeding Getting Started Select Ignore to disable the warning message Go to Start Control Panel and double-clickSystem Getting Started Verify Your Module Connection Send Commands To This Instrument IO Control will launch automatically when you start your PC Launch Your Agilent Measurement Manager T E Pin Backplane Connector Pin Configuration Description Chassis Installation Pulse Waveform Triggering Output Function Output ConfigurationIntroduction 1Output functions Function Limitation Amplitude Limitation Soft Front Panel Operation Waveform pattern selection Waveform parameters Output Frequency Remote Interface Operation2Output frequency range Function Limitations Duty Cycle Limitations Output Amplitude Offset Voltage LimitationsLimits Due to Output Termination Limits Due to Units Selection 4Panel view of the amplitude section DC Offset Voltage Limits Due to Amplitude VOLTageOFFSet offset Output Units Output Termination OUTPutLOAD ohmsINFinity Duty Cycle Square Waves Duty CycleLimits Due to Frequency APPLy command automatically sets the duty cycle to 50% Symmetry Ramp Wave 9Ramp wave duty cycles Output Control 11Panel view of the output section Set Output Using Scpi Commands Example 1, To output a DC voltage Example 2, To output a Sine wave Example 4, To output a Ramp wave Pulse Waveform Pulse Period Pulse Width 13Panel view of the pulse width section Pulse Duty Cycle Duty Cycle = 100 ⋅ Pulse Width / Period Generate Pulse Waveform Using Scpi Commands Example Amplitude Modulation AM To Select AMModulating frequency AM depth Carrier Waveform 15Panel view of AM Carrier Frequency 3Carrier frequency for AM Default modulating waveform is Sine wave Modulating Waveform Modulating Waveform Frequency Modulation DepthPeak into a 50 Ω load Generate AM Using Scpi Commands Frequency Modulation FM To Select FMModulating frequency FM deviation FMSTATe 0OFF1ON 4Carrier frequency for FM FMINTernalFUNCtion SINusoidSQUareRAMPNRAMpTRIangleUSER Frequency Deviation Generate FM Using Scpi Commands Phase Modulation PM Modulating frequency Phase deviationTo Select PM PMSTATe 0OFF1ON 5Carrier frequency for PM Default waveform is Sine wave Phase Deviation Generate PM Using Scpi Commands Frequency-Shift Keying FSK Modulation To Select FSK ModulationFSK rate Hop frequency FSKeySTATe 0OFF1ON FSK Carrier Frequency 6Carrier frequency for FSK FSK Hop Frequency 7Hop frequency Generate FSK Modulation Using Scpi Commands FSK Rate Phase-Shift Keying PSK Modulation To Select PSK ModulationPSK rate PSK deviation PSKeySTATe 0OFF1ON PSK Carrier Frequency 8Carrier frequency for PSK PSK Rate PSK Deviation Generate PSK Modulation Using Scpi Commands Amplitude-Shift Keying ASK Modulation To Select ASK ModulationASK rate ASKeySTATe 0OFF1ON 9Carrier frequency for ASK Generate ASK Modulation Using Scpi Commands ASK Rate Frequency Sweep To Select SweepFrequency Linear type Start frequency Stop frequency Start Frequency and Stop Frequency 28Panel view of sweep Sweep Mode Sweep Time Sweep Trigger Source Set Frequency Sweep Using Scpi Commands Triggering Trigger Source Choices Internal Triggering Manual Triggering External Triggering Trigger Rising edge shown Trigger Input SignalTrigger Output Signal Trigger out 500 μs Rising edge shown OUTPutTRIGger 0OFF1ON OUTPutTRIGgerSLOPe POSitiveNEGative Set Triggering Using Scpi Commands Arbitrary Waveforms To Create and Store an Arbitrary Waveform Select the Arbitrary waveform function Start waveform editing process Exiting the waveform editor Characteristics and Specifications Product Characteristics Operating Environment Product Specifications and Characteristics Waveforms Ramp, Triangle ±1% of settling ±5 mV ±10 mV @ Hi-Z Units Vpp, Vrms, dBm Resolution DigitsExternal frequency reference ±5 V across open circuit Modulation Sweep Characteristics 102 U2761A User’s Guide Index PSK United States Tel 800 829