JUNCTEK
JDS8000 Series User’s Manual
Press the soft key
【
Rate
】
, when the frequency is on, you can set the rate of
the modulating wave, press the soft key
【
Carr.F
】
again, the carrier frequency
is on, you can set the carrier frequency. (The modulation rate is only available
after using the "internal" modulation source)
Use the
【
InBox
】
button to input the desired frequency value in the input box.
The frequency range is 0.001Hz to 1MHz, the default is 500Hz.
Set ASK amplitude
Press
【
Ampl
】
soft key to set the ASK amplitude.
Use the
【
InBox
】
key to input the desired amplitude value in the input box.
The range of ASK range is 0%-200%, and the default is 80%.
(5) FSK
The modulation method in which the carrier frequency is controlled by a digital
signal is called frequency shift keying (FSK).
Select 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 FSK
Press
【
MOD
】
→press
【
Type
】
→select the key frequency by adjusting the
knob or pressing direction keys.
Set the polarity
Press the soft key
【
PolarType
】
to select the amplitude output controlled by
the “positive polarity” or “negative polarity” of the modulating waveform.
Internal
During internal modulation, if the polarity is set to "positive polarity", the
carrier frequency will be output when the modulating waveform amplitude
is a logic low level, and the hopping frequency will be output when the
modulating waveform amplitude is a logic high level. When the polarity is
"Negative", the opposite is true.
External
During external modulation, if the polarity is set to "positive polarity", when
the external input signal is logic low level, the carrier frequency is output;
when the external input signal is logic high level, the hopping frequency is
output. When the polarity is "Negative", the opposite is true.
Select signal source
The JDS8000 series products can accept modulation waveforms from internal
or external modulation sources.
Press
【
Source
】
to select "Internal" or "External" modulation source.
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