Rigol DHO924 DHO900 series user manual

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You can also use the corresponding multipurpose knob to set the value. AM depth

ranges from 0% to 120%, and the default is 100%.

• At 0% depth, the amplitude is one-half of the carrier's amplitude setting.

• At 100% depth, the amplitude is identical to the carrier's amplitude setting.

• At greater than 100% depth, the instrument will not exceed 10 Vpp on the

output.

Set the Modulation Frequency

When the selected modulating waveform is not noise, you can set the modulation

frequency. Click or tap the

Mod Freq input field to set the modulation frequency with

the pop-up numeric keypad. You can also use the corresponding multipurpose knob

to set the value. Its range is from 2 mHz to 1 MHz.

To Enable the Modulation Output

Click or tap

Modulation on/off switch to enable the modulation function. In the

"Basic waves" setting menu, click or tap the

Output on/off switch to enable the

waveform output. The instrument will output the modulated waveform via the rear-

panel [AFG OUT] connector according to the settings.

14.2.2 FM

Frequency Modulation (FM), namely the frequency of the carrier waveform changes

with the voltage of the modulating waveform.

Select the Modulation Type

Click or tap the

Modulation Type drop-down button to select "FM".

Select the Modulating Waveform

The instrument uses built-in signals for modulation. Click or tap the

Shape drop-

down button to select the modulating waveform. Available waveforms include:

• Sine

• Square with 50% duty cycle

• Triangle with 50% symmetry

• UpRamp with 100% symmetry

• DnRamp with 0% symmetry

• White gaussian noise

Set the Frequency Deviation

Frequency deviation represents the peak variation in frequency of the modulated

waveform from the carrier frequency. Click or tap the

Deviation input field to set the

frequency deviation with the pop-up numeric keypad. You can also use the

Function/Arbitrary Waveform Generator (for

DHO914S and DHO924S only)

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Rigol DHO924 oscilloscope