Agilent Technologies E1441A Fm Commands, BM:INTernal:RATE?, BM:SOURce?, BM:STATe?

BM:INTernal:RATE?

[SOURce:]BM:INTernal:RATE? [MINMAX] queries the burst rate. Returns a value in hertz.

BM:SOURce

[SOURce:]BM:SOURce INTernalEXTernal selects the burst modulation source. In the external gated burst mode, the output waveform is either “on” or “off ” based on the level of the signal applied to the front-panel Ext Trig terminal or VXIbus TTLTRG line selected by TRIG:SOUR). The default is INT. [ Stored in volatile memory ]

Comments • When the internal burst source is selected, the external gated mode is disabled.

•When the external gate source is selected, the output is enabled or disabled based on the logic level of the gate signal applied to the Ext Trig terminal. When the gate signal is true (TTL high), the function generator outputs a continuous waveform. When the gate signal is false (TTL low), the output is turned off (zero volts or the dc offset level).

•When the external gate source is selected, the burst count, burst rate, burst phase, and burst trigger source are ignored (these parameters are used for the counted burst mode only).

BM:SOURce?

[SOURce:]BM:SOURce? queries the present burst modulation source. Returns “INT” or “EXT”.

BM:STATe

[SOURce:]BM:STATe OFFON disables or enables burst modulation. To ensure proper operation, you should enable the burst mode after you have set up the other modulation parameters. Only one modulation mode can be enabled at a time. When you enable the burst mode, the previous modulation mode is turned off.

BM:STATe?

[SOURce:]BM:STATe? queries the state of burst modulation. Returns “0” (OFF) or “1” (ON).

FM COMMANDS

Use the APPLy command or the equivalent FUNC:SHAP, FREQ, VOLT, and

VOLT:OFFS commands to configure the carrier waveform. Set the carrier frequency

104 Agilent E1441A SCPI Command Reference Chapter 3