UNI-T UTG9504T User Manual page 51

UTG9000T Series Function Abitrary Waveform Generator
Carrier wave frequency settings
Refer to The carrier wave frequency settings of AM modulation.
Select the source of modulation
UTG9000T function/arbitrary waveform generator can select internal or external modulation source. When turn on FM
modulation, the default modulation source is internal. Rotate multifunction knob or tap ModSrc tab to step through internal
or external modulation source in ASK modulation setting interface.
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
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