RIGOL MSO/DS2000A Series - Manual (Page 246)

RIGOL Chapter 13 Signal Source
13-22 MSO2000A/DS2000A User’s Guide
1 Hz to 50 kHz.
5. Set the Modulation Deviation
Press Deviation to set the deviation of the frequency of the modulating
waveform relative to the carrier frequency. The range is from 0 Hz to the current
carrier frequency and the sum of the frequency deviation and carrier frequency
cannot be greater than the current carrier frequency upper limit. For the setting
method, please refer to the introduction in “
Parameter Setting Method”.