44
cable.
2.
Select CH1 and press Mod to select the desired modulation type as well as set the
corresponding parameters, and then select external modulation source.
3.
Select CH2 and select the desired modulating waveform and set the corresponding
parameters.
4.
Press Output to enable the output of CH1.
To Set Modulation Depth
Modulation depth expressed as a percentage indicates the amplitude variation degree. AM
modulation depth varies from 1% to 120%. Press AM Depth to set the parameter.
For an external source, the depth of AM is controlled by the voltage level on the
connector connected to the [Aux In/Out]. ± 6 V correspond to 100% depth.
When external modulation source is selected, this menu is hidden.
To Set Modulation Frequency
When an internal modulation source is selected, press AM Freq to highlight the parameter, and
then use the numeric keyboard or knob to input the desired value.
The modulation frequency ranges from 1 mHz to 20 kHz.
When an external modulation source is selected, this menu is hidden.
DSB-AM Modulation
DSB-AM is an abbreviation for Double-Sideband Suppressed Carrier – Amplitude Modulation.
Press Mod → Type → DSB-AM. The parameters of DSB-AM modulation are shown in Figure 29.
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