Waveform Generator 19
Keysight InfiniiVision 3000T X-Series Oscilloscopes User's Guide 315
• Frequency-Shift Keying Modulation (FSK) — the output frequency "shifts"
between the original carrier frequency and a "hop frequency" at the
specified FSK rate. The FSK rate specifies a digital square wave
modulating signal. See “To set up Frequency-Shift Keying Modulation
(FSK)" on page 317.
To set up Amplitude Modulation (AM)
In the Waveform Generator Modulation Menu (under [Wave Gen] > Settings >
Modulation):
1 Press the Type softkey and turn the Entry knob to select Amplitude Modulation
(AM).
2 Press the Waveform softkey and turn the Entry knob to select the shape of the
modulating signal:
• Sine
• Square
• Ramp
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 AM Freq softkey and turn the Entry knob to specify the frequency of
the modulating signal.
4 Press the AM Depth softkey and turn the Entry knob to specify the amount of
amplitude modulation.
AM Depth refers to the portion of the amplitude range that will be used by the
modulation. For example, a depth setting of 80% causes the output amplitude
to vary from 10% to 90% (90% – 10% = 80%) of the original amplitude as the
modulating signal goes from its minimum to maximum amplitude.
The following screen shows an AM modulation of a 100 kHz sine wave carrier
signal.
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