Datasheet

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This is to say, when the modulation depth is at 0, carrier amplitude is a half of amplitude
setting.
5.4.3 Modulating Waveform Frequency
Press 〖AM Freq〗softkey to set the value of AM frequency. Usually the modulating
frequency should be far lower than carrier frequency.
5.4.4 Modulating Waveform Shape
Press 〖Shape〗softkey then select ‘Shape’ to enter the desired wave. Press Waveform
Menu key, then select one of most waveforms in above as modulating waveform. Finally,
return to modulating menu.
5.4.5 Modulating Source
The waveform generator will accept an internal or external modulation source for AM.
Press 〖Source Int/Ext〗softkey. It’s available to set modulating frequency and modulating
waveform if ‘Internal’ source is selected. But if you select External source, the carrier
waveform is modulated with an external waveform. The Modulating Depth is same as
actual value if amplitude 5Vpp, dc offset 0Vdc signal level present on the rear-panel
<Mod In> connector.
5.5 Phase Modulation (PM)
In PM, carrier phase varies with the instantaneous voltage of modulating waveform.
Press 【Modulate】key to enter into the Modulating output mode, the working mode
displays as Mod. Then press〖Type〗and select PM mode, displaying the PM sketch and
PM menu.
5.5.1 Set Carrier
Firstly, set the shape, frequency, amplitude and offset of Carrier Waveform. You can
select most waveforms from above to be carrier, but some waveforms are not available.
5.5.2 Phase Deviation
Press〖Phase Dev〗softkey then enter the desired value using knob or keypad. The phase
deviation setting represents the peak variation in phase of the modulated waveform from
the carrier waveform. If at positive peak value, the phase of output signal increases one
phase deviation. If at negative peak value, the phase of the output signal will decrease
one phase deviation.