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Programming Guide 2-25
ESG Family Signal Generators Programming Commands and Examples
:FM Subsystem
Internal Frequency Modulation Source Rate
:FM[1]|2:INTernal[1]:FREQuency <val><unit>
:FM[1]|2:INTernal:FREQuency?
This command sets the internal modulation frequency for the
FM Path 1 and FM Path 2
configurations. The current value for FM rate is displayed in the active entry area. The
range of values allowed is 0.1 Hz to 10 kHz. (0.1 Hz to 50 kHz is the range allowed if
sinewave is selected as the internal waveform.) The minimum increment allowed is 0.1 Hz.
Notice that the new value of FM rate applies only to whichever FM path configuration you
have currently selected.
*RST Value: 400.0 Hz
Internal Frequency Modulation Sweep Time
:FM[1]|2:INTernal[1]:SWEep:TIME <val><unit>
:FM[1]|2:INTernal:SWEep:TIME?
This command selects the sweep time for a swept-sine, internally-generated signal.
*RST Value: 100 msec
Internal Frequency Modulation Sweep Trigger
:FM[1]|2:INTernal[1]:SWEep:TRIGger IMMediate|BUS|EXTernal|KEY
:FM[1]|2:INTernal:SWEep:TRIGger?
This command selects the trigger for the frequency modulation sweep.
*RST Value: Immediate
Internal Frequency Modulation Waveform
:FM[1]|2:INTernal[1]:FUNCtion:SHAPe SINE|TRIangle|SQUare|RAMP|
NOISe|DUALsine|SWEPtsine
:FM[1]|2:INTernal:FUNCtion:SHAPe?
This command allows you to assign an FM waveform to your
FM Path 1 and FM Path 2
configurations. Select from sine, triangle, square, ramp, noise, dual sine, and swept sine
waveforms. Notice that your waveform selection applies only to whichever AM path
configuration you have currently selected.
Using the command :FM[1]|2:INTernal[1]:FUNCtion:SHAPe SINE lets you specify sine as
the amplitude modulation waveform for the
FM Path 1 and FM Path 2 configurations. Notice
that the selected waveform applies only to whichever FM path configuration you have
currently selected.
Using the command :FM[1]|2:INTernal[1]:FUNCtion:SHAPe TRIangle lets you specify
triangle as the amplitude modulation waveform for the
FM Path 1 and FM Path 2
configurations. Notice that the selected waveform applies only to whichever FM path
configuration you have currently selected.
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