Keysight Technologies InfiniiVision 3000 X Series, User Manual

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270 Keysight InfiniiVision 3000 X-Series Oscilloscopes User's Guide
17
Waveform Generator
1 Press the Type softkey and turn the Entry knob to select Frequency Modulation
(FM) .
2 Press the Waveform softkey and turn the Entry knob to select the shape of the
modulating signal:
• Sine
• Square
• Ramp
• Sine Cardinal
• Exponential Rise
• Exponential Fall
When the Ramp shape is selected, a Symmetry softkey appears so that you can
specify the amount of time per cycle that the ramp waveform is rising.
3 Press the FM Freq softkey and turn the Entry knob to specify the frequency of the
modulating signal.
4 Press the FM Dev softkey and turn the Entry knob to specify the frequency
deviation from the original carrier signal frequency.
When the modulating signal is at its maximum amplitude, the output frequency
is the carrier signal frequency plus the deviation amount, and when the
modulating signal is at its minimum amplitude, the output frequency is the
carrier signal frequency minus the deviation amount.
The frequency deviation cannot be greater than the original carrier signal
frequency.
Also, the sum of the original carrier signal frequency and the frequency
deviation must be less than or equal to the maximum frequency for the selected
waveform generator function plus 100 kHz.
The following screen shows an FM modulation of a 100 kHz sine wave carrier
signal.