Keysight N5171B EXG Manual page 306

Analog Modulation Commands
Pulse Modulation Subsystem–Option UNU and UNW and Option 320 ([:SOURce])
[:SOURce]:PULM:STATe ON|OFF|1|0
[:SOURce]:PULM:STATe?
This command enables or disables pulse modulation for the selected path.
When pulse modulation is enabled, the PULSE annunciator appears on the
signal generator's front-panel display.
Example
:PULM:STAT ON
The preceding example enables the pulse modulation.
306
*RST 0
Key Entry Pulse Off On
Keysight EXG and MXG X-Series Signal Generators SCPI Command Reference