Agilent Technologies E1441A user service AM:SOURce?, AM:STATe?, •*RST Condition: BOTH

Comments • The External modulating source is always enabled.

•When both sources are enabled (internal-external), the function generator adds the internal and external modulating signals (the carrier waveform is actually modulated with two waveforms).

•When only the external source is enabled (AM:SOURce EXT, internal source disabled), the carrier waveform is modulated only by the external waveform.

•You apply the external modulating waveform to the AM Modulation (AM Mod) terminal. The modulation depth is controlled by the signal level present (5 volts peak corresponds to 100% modulation).

•*RST Condition: BOTH

AM:SOURce?

[SOURce:]AM:SOURce? queries the modulating source. Returns “BOTH” or “EXT”.

AM:STATe

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

•*RST Condition: 0 (OFF)

AM:STATe?

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

Chapter 3 Agilent E1441A SCPI Command Reference 95