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Chapter 17 Function/Arbitrary Waveform Generator (MSO7000 Option) RIGOL
MSO7000/DS7000 User Guide 17-15
FM
FM (Frequency Modulation), namely the frequency of the carrier waveform changes
with that of the modulating waveform, as shown in the figure below.
Figure 17-11 Frequency Modulation
1. Select the Modulating Waveform
Press Waveform, and rotate the multifunction knob to select the desired
modulating waveform, and then press down the knob to select it. You can also
press Waveform continuously or enable the touch screen to select it. The
available modulating waveforms include Sine, Square, Triangle, and Noise.
2. Set the Modulation Frequency
Press Frequency, then rotate the multifunction knob or use the pop-up
numeric keypad to set the frequency of the modulation signal. The available
range is from 1 Hz to 50 kHz.
3. Set the Frequency Offset
Press Deviation, then rotate the multifunction knob or use the pop-up
numeric keypad to set the frequency deviation of modulating waveform from the
carrier frequency. The available range of the frequency deviation is from 1 Hz to
the frequency of the current carrier waveform.
FSK
FSK (Frequency-shift Keying) is a modulation method that uses the digital signal to
control the carrier frequency changes. It is one of the modulation methods that have
been early used in information transmission. Its advantages lie in good performance
in anti-noise and anti-attenuation, and it has been widely used in low and medium
Modulating
Signal
Carrier Signal
Modulating
Waveform
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