Disable or enable FM. To avoid multiple waveform changes, you can enable
FM after you have set up the other modulation parameters. The default is
OFF. The :FM[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 FM and AM at the same time. When you enable
FM, the previous modulation mode is turned off. The instrument will not
allow FM to be enabled at the same time that sweep or burst is enabled.
When you enable FM, the sweep or burst mode is turned off.