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Chapter 4 Remote Interface Reference
Phase Modulation (PM) Commands
4
Phase Modulation (PM) Commands
See also “Phase Modulation” on page 85 in chapter 3.
PM Overview
The following is an overview of the steps required to generate a
PM waveform. The commands used for PM are listed on the next page.
1 Configure the carrier waveform.
Use the APPLy command or the equivalent FUNC, FREQ, VOLT, and
VOLT:OFFS commands to select the function, frequency, amplitude, and
offset of the carrier waveform. You can select a sine, square, ramp, or
arbitrary waveform for the carrier (pulse, noise, and dc are not allowed).
2 Select the modulation source.
The function generator will accept an internal or external modulation
source. Select the modulation source using the PM:SOUR command.
For an external source, you can skip steps 3 and 4 below.
3 Select the shape of the modulating waveform.
You can modulate the carrier with a sine, square, ramp, noise,
or
arbitrary waveform (pulse and dc are not allowed). Use the
PM:INT:FUNC
command to select the modulating waveshape.
4 Set the modulating frequency.
Set the modulating frequency to any value from 2 mHz to 20 kHz using
the PM:INT:FREQ command.
5 Set the phase deviation.
Set the phase deviation to any value from 0 to 360 degrees using the
PM:DEV command.
6 Enable PM modulation.
After you have set up the other modulation parameters, use the
PM:STAT ON command to enable PM.
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