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User Manual 33
5.1 AM Modulation
A modulated waveform consists of a carrier waveform and a modulating waveform. In AM, the
carrier amplitude is varied by the voltage level of the modulating waveform.
5.1.1 Select AM Modulation
Press
Mod->Type->AM
to enable AM function.
When
Mod
is enabled,
Sweep
or
Burst
will be disabled automatically.
After AM is enabled, the instrument will generate AM waveform with the currently specified
carrier and modulating waveforms. To avoid multiple waveform changes, enable modulation
after configuring the other modulation parameters.
5.1.2 Carrier Waveform Shape
AM carrier shape: Sine (default), Square, Ramp, Pulse, Arbitrary (except DC) or Harmonic
waveform.
Press the front panel key
Sine
,
Square
,
Ramp
,
Pulse
,
Arb -> Type
or
Harmonic
to select a
desired carrier waveform shape.
Noise and DC could not be used as carrier waveform.
5.1.3 Carrier Frequency
The maximum carrier frequency varies by function, as shown below. The default is 1 KHz for all
functions.
Carrier Waveform
Frequency Range
Sine
1μHz to 200MHz
Square
1μHz to 60MHz
Ramp
1μHz to 5MHz
Pulse
1μHz to 50MHz
Arbitrary Waveform
1μHz to 50MHz
After the carrier waveform is selected, you can press
Frequency/Period
to highlight "Frequency",
and then use the numeric keyboard or direction keys and knob to input the desired frequency
value.
5.1.4 Modulating Waveform Source
HDG6000B(C) can receive modulating waveform from Internal (default), External, or Other
Channel. Press
Mod
->
Source
to select the modulation source.