UNI-T UTG9504T User Manual page 100

Select the source of modulation
UTG9000T function/arbitrary waveform generator can select internal or external modulation source. When turn on PSK
modulation, the default modulation source is internal. Rotate multifunction knob or tap ModSrc tab to step through internal
or external modulation source in PSK modulation setting interface.
1) Internal source
When the modulation source is internal, the modulation waveform can be sine, square, rising ramp, falling ramp
arbitrary and noise wave. The default wave is sine wave. When turn on PWM modulation, ModWave present Sine,
rotate multifunction knob or tap word Sine to select the waveform in modulation setting interface.
 Square wave: duty ratio 50%
 Rising ramp wave: symmetry 100%
 Falling ramp wave: symmetry 0%
Arbitrary wave: the length of arbitrary wave limit at 4kpts by the method of select point

 Noise wave: white gaussian noise
2) External source
When the modulation source is external, the modulation wave and frequence will be hidden in parameter list. Use
the external waveform to modulating the carrier wave. The PWM duty ratio offset is controlled by the ±5V signal level
on the external analog modulation input terminal (Modulation In connector) on the back panel. For example, if set
the duty ratio offset to 15% when the external modulated signal is +5V, the duty ratio of the carrier wave (pulse wave)
increase 15%, the lower external signal level produces less deviation.
Modulation waveform frequency settings
When the modulation source is internal, it can set the modulation waveform frequency, and the frequency range is
between 1μHz~2MHz, the default range is 100Hz. Rotate multifunction knob, push direction key or tap ModFreq tab
to pop-out visual numeric keyboard to enter values and select unit in FM modulation setting interface. When the
modulation source is external, the modulation wave and frequence will be hidden in parameter list. Use the external
UTG9000T Series Function Abitrary Waveform Generator
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automatically