Rigol DG811, User Manual

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Chapter 2 Front Panel Operations RIGOL
DG800 User's Guide 2-49
To Set the Modulation Polarity
Tap the Polarity parameter selection field to select "Positive" or "Negative" polarity
of the modulating waveform to control the output frequency.
In the internal modulation, set the polarity to "Positive", and the generator will
output the carrier frequency when the modulating waveform amplitude is a logic low
level. It will output the hop frequency when the modulating waveform amplitude is a
logic high level. The situation is the opposite when the polarity is set to "Negative".
In the external modulation, set the polarity to "Positive", and the generator will
output the carrier frequency when the external input signal is a logic low level. It will
output the hop frequency when the external input signal is a logic high level. The
situation is the opposite when the polarity is set to "Negative".