Function introduction
AFG31000 Series Arbitrary Function Generator User's Manual 63
FSK waveform
Frequency-shift keying modulation is a modulation technique that shifts the output signal frequency
between two frequencies: The carrier frequency and Hop frequency. The following example describes
how to output an FSK waveform.
To output an FSK waveform:
1. Select Basic.
2. Make sure that Sine is selected for CH1 on the touchscreen. For this example, a sine waveform
is used as an output waveform (carrier waveform).
3. Select Continuous mode on the CH1 drop-down menu on the touchscreen.
4. Select Modulation.
5. Scroll down to find the Mod Type and change it to FSK.
6. For the FSK Source setting, choose either Internal or External. If you choose External, the FSK
Rate is ignored.
7. Set the Hop Frequency setting. Note that the carrier waveform frequency shifts to the Hop
Frequency with the specified FSK rate, and then returns to the original frequency.
NOTE. The AFG31000 Series Arbitrary Function Generator instruments create a phase continuous FSK
signal.
Figure 37: Modulation type
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