
Programming Guide 2-49
ESG Family Signal Generators Programming Commands and Examples
:PM Subsystem
Internal Φ Modulation Alternate Frequency
:PM[1]|2:INTernal[1]:FREQuency:ALTernate <val><unit>
:PM[1]|2:INTernal:FREQuency:ALTernate?
This command sets the frequency for the alternate signal. The alternate frequency is the
second frequency of a dual-sine or the stop frequency of a swept-sine. The choices for the
variables <val> and <unit> range from 0.1 kHz (minimum) to 50.0 kHz (maximum).
*RST Value: 400.00 Hz
Internal Φ Modulation Alternate Frequency Amplitude
:PM[1]|2:INTernal[1]:FREQuency:ALTernate:AMPLitude:PERCent <val><unit>
:PM[1]|2:INTernal:FREQuency:ALTernate:AMPLitude:PERCent?
This command sets the amplitude of the alternate frequency as a percentage of the total
amplitude (phase modulation deviation). Therefore, if the alternate frequency makes up
30% of the total amplitude, then the primary frequency is 70% of the total phase
modulation deviation amplitude (for dual-sine only). The choices for the variables <val>
and <unit> range from 0.1% (minimum) to 99.9% (maximum).
*RST Value: 50%
Internal Φ Modulation Source Rate
:PM[1]|2:INTernal[1]:FREQuency <val><unit>
:PM[1]|2:INTernal:FREQuency?
This command sets the rate of the internally-generated modulation source. The choices for
the variables <val> and <unit> range from 0.1 Hz (minimum) to 50 kHz (maximum) if the
internal waveform is Sine wave. For all other waveforms, the maximum internal amplitude
modulation rate is 10 kHz.
*RST Value: 400.0 Hz
Internal Φ Modulation Sweep Time
:PM[1]|2:INTernal[1]:SWEep:TIME <val><unit>
:PM[1]|2:INTernal:SWEep:TIME?
This command selects the sweep time for a swept-sine, internally-generated signal.
*RST Value: 0.1 Hz
Internal Φ Modulation Sweep Trigger
:PM[1]|2:INTernal[1]:SWEep:TRIGger IMMediate|BUS|EXTernal|KEY
:PM[1]|2:INTernal:SWEep:TRIGger?
This command selects the trigger for the phase modulation sweep.
*RST Value: Immediate
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