Specifications

Programming Guide 2-19

ESG Family Signal Generators Programming Commands and Examples

:DM and :BURSt Subsystems (ESG-D and ESG-DP Series)

:DM and :BURSt Subsystems

(ESG-D and ESG-DP Series)

These digital modulation subsystems are used to set the I/Q modulation controls and the

I/Q parameters associated with I/Q modulated signals.

Burst Envelope State

:BURSt:STATe ON|OFF|1|0

:BURSt:STATe?

This command enables/disables the burst envelope. The choices are On (1) or Off (0).

*RST Value: Off

Burst Source

:BURSt:SOURce EXTernal[1]|INTernal[1]

:BURSt:SOURce?

Use this command to select either an internally-generated or an externally-supplied burst

source. For an externally-supplied burst source, apply the in-phase and quadrature-phase

signals to the I INPUT and Q INPUT connectors. The signal level is = 0.5 V

rms

*RST Value: External

Digital Modulation Source

:DM:SOURce EXTernal|INTernal[1]

:DM:SOURce?

Use this command to change the I/Q source to externally supplied I and Q signals. Apply

the in-phase and quadrature-phase signals to the I INPUT and Q INPUT connectors. The

signal level is = 0.5 V

rms

. If you do not have Option UN8, this is the only I/Q source

and it cannot be changed. If you have Option UN8, the I/Q source can also be set to an

internal I/Q source.

*RST Value: External

Digital Modulation Mode State

:DM:STATe ON|OFF|1|0

:DM:STATe?

This command enables/disables the I/Q modulation. The choices are On (1) or Off (0).

Notice, however, that although you can enable I/Q modulation with this command, the RF

carrier is modulated only when you have the modulation activated. Whenever I/Q

modulation is enabled, the I/Q annunciator is turned on in the display.

*RST Value: Off

I+Q