UNI-T UTG9000T Series, User Manual, Page: 54 / 162

UTG9000T Series Function Abitrary Waveform Generator
54
1) Internal source
When the modulation source is internal, the modulation wave is a square sine with duty ratio
50% (buit-in and can’t adjustable). It can select rate of the modulated wave amplitude by the
frequency settings.
2) External source
When the modulation source is external, rate will be hidden in paramteter list. Use the
external waveform to modulating the carrier wave. The ASK amplitude output is controlled by
logical level on the external digital modulation terminal (FSK Trig connector) on the back
panel.For example, output the current carrier amplitude when the external input is low; output
amplitude is less than the current carrier amplitude when the external input is high.
Modulation waveform frequency settings
When the modulation source is internal, it can set the modulation waveform frequency, and the
frequency range is between 1uHz~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
ASK modulation setting interface.
Comprehensive example
In ASK modulation mode, set an internal logical signal 300Hz as the modulating signal, another
sine wave with frequency 15kHz, amplitude2Vpp as the carrier signal, the settings steps as
following,
Note: It can only set the frequency of this signal, the frequency is the ASK rate. Logic signal is
self-configurable by the instrument.
1
）
Turn on ASK modulation mode: tap CH1 → Modulate → ASK accordingly.