JUNCTEK
JDS8000 Series User’s Manual
19
signal source and adding it to the carrier to make it suitable for channel
transmission. It is the technology that changes the carrier with the signal.
Carrier wave can be sine waveform, square waveform, pulse waveform,
arbitrary waveform (except DC signal waveform). The modulated waveform
can come from an internal modulation source or an external modulation source.
The modulation types supported by JDS8000 series generators include AM,
FM, PM, ASK, PSK, FSK, pulse and burst. The modulation interface is shown
as Figure 3-3-1.
Modulation function description video link:
Figure 3-3-1Modulation interface
(1) AM
Amplitude modulation is a modulation method in which the amplitude of the
carrier waveform changes according to the change law of the desired
transmission signal, but the frequency remains unchanged.
Select carrier waveforms
The carrier waveform of amplitude modulation can be sine waveform, square
waveform, sawtooth waveform or arbitrary waveform (except DC), the default
is sine waveform.
In the waveform interface, press
【
Shape
】
to select the desired carrier
waveform through the knob. DC in pulse waveform, noise waveform and
arbitrary waveform cannot be used as carrier. Different settings of several
parameters of the carrier waveform (such as frequency, amplitude, offset and
start phase, etc.) will affect the output AM modulated waveform. For different
carrier waveforms, the setting range of each parameter of the carrier is also
different (related to the instrument model you use and the selected carrier
waveform).
For the setting method of carrier parameters, please refer to the relevant
introduction in the section "Output Basic Waveform".
To Select AM
Press
【
MOD
】
→ double click
【
Type
】
→
【
AM
】
to enable the amplitude
modulation function or select the amplitude modulation by adjusting the knob.
Summary of Contents for JDS8000 Series
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