UNI-T UTG9504T User Manual page 41

UTG9000T Series Function Abitrary Waveform Generator
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 FM 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 2kpts 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 FM offset is controlled by the ±5V signal level on the
external analog modulation input terminal (Modulation In connector) on the back panel. The frequency of the output
at the positive signal level is greater than the carrier wave frequency, at the negative signal level is less than the
carrier wave frequency, the lower external signal level produces less deviation. For example, if set the frequency
deviation to 1kHz, the FM output increased by 1kHz to the current fundamental frequency when the external
modulated signal is +5V; the FM output subtracted by 1kHz from the current fundamental frequency when the
external modulated signal is -5V.
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
waveform to modulating the carrier wave. The intput external modulating signal frequency range is between
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automatically