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Agilent E1441A SCPI Command Reference 95
Chapter 3
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 OFF|ON 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).