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Chapter 4 Remote Interface Reference
Phase Modulation (PM) Commands
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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