UNI-T UTG1000 Series User Manual page 47

1) Internal Source
When modulation source is internal, internal modulation wave is a square wave of 50% duty cycle (not adjustable).
The ASK rate can be set to customize modulated waveform amplitude hopping frequency.
2) External Source
When modulation source is external, carrier waveform will be modulated by an external waveform. ASK output
amplitude is determined by the logic level of modulation interface on front panel. For example, output the carrier
wave amplitude of current setting when external input logic is low, and output carrier wave amplitude less than the
amplitude of current setting when external input logic is high.
ASK Rate Setting
When modulation source is internal, frequency of ASK amplitude jump can be modulated. After enabling ASK
function, ASK rate can be set and the settable range is 2mHz to 100kHz, the default rate is 1kHz. If need to change,
press Carrier Wave Parameter→Rate in turn.
Comprehensive Example
Make the instrument work in amplitude shift keying (ASK) mode, then set a logic signal with 300Hz from the internal
of the instrument as a modulation signal and a sine wave with frequency of 15kHz and amplitude of 2Vpp as a
carrier wave signal. Specific steps are seen as following:
1) Enable Amplitude Shift Keying (ASK) Function
Press Menu→Modulation→Type→Amplitude Shift Keying in turn to start the ASK function.
UTG1000A Series 45