JUNCTEK
JDS8000 Series User’s Manual
To Select Source
The JDS8000 generator can accept modulation waveforms from internal or
external modulation sources.
Press
【
Signal Source
】
to select “Internal” or “External” modulation source.
Internal
After selecting the internal modulation source, press the
【
Wave
】
soft key
to select sine waveform, square waveform, triangle waveform, ascending
ramp, descending ramp and arbitrary waveform as the modulation source.
The default is sine wave.
External
When the external modulation source is selected, the signal generator
accepts the external modulation signal input from the MOD connector on
the front panel.
The frequency range of the external signal is 0~20kHz, and the amplitude
range is -5V~+5V.
Set modulation waveform frequency and carrier frequency
Press the soft key
【
Mod.F
】
, when the frequency is on, you can set the
frequency of the modulating waveform, press the soft key
【
Carr.F
】
again, the
carrier frequency is on, you can set the frequency of the carrier waveform.
(The modulating waveform frequency can only be used after using the
"internal" modulation source)
Use the
【
InBox
】
button to input the desired frequency value in the input box.
The modulation frequency range is 0.001Hz to 1MHz, and the default is
500Hz.
Set modulation depth
Modulation depth indicates the degree of amplitude change, expressed as a
percentage. The AM modulation depth can be set from 0% to 200%. Press
【
Depth
】
soft key to set AM modulation depth.
(2) FM
The modulation method in which the carrier frequency is changed according to
the modulating signal is called frequency modulation. The magnitude of the
frequency change of the modulated waveform is determined by the magnitude
of the modulating signal, and the period of change is determined by the
frequency of the modulating signal.
Choose the carrier waveform
Refer to "Selecting Carrier Waveform" in "Amplitude Modulation". DC in pulse
waveform, noise waveform and arbitrary waveform cannot be used as carrier.
Select FM
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