Disable or enable PM. To avoid multiple waveform changes, you can enable
PM after you have set up the other modulation parameters. The default is
OFF. The :PM[1|2]:STAT? query returns “0” (OFF) or “1” (ON). The
instrument will allow only one modulation mode to be enabled at a time. For
example, you cannot enable PM and AM at the same time. When you
enable PM, the previous modulation mode is turned off. The instrument will
not allow PM to be enabled at the same time that sweep or burst is enabled.
When you enable PM, the sweep or burst mode is turned off.