An external sample clock can also be used as the clock generator. Arbitrary waveforms may be replayed at a specified waveform frequency, period or sample rate. Arbitrary Generators with a variable clock permit waveform linking, looping and sequencing. These may be described as Universal Arbitrary Waveform Generators or simply Arbitrary Waveform Generators (AWG) or Variable clock Arbitrary generators. These generators also use DDS for the production of standard waveforms (function generator mode), but use a variable clock for generating arbitrary waveforms. The Aim-TTi TGF4000 series represents the latest and most accurate use of DDS technology and digital control architecture to release the ultimate DDS performance in a Function/Arb /Pulse generator. These are most commonly described as either Function/Arbitrary Generators or Arbitrary/Function Generators (AFG). These generators use DDS for the production of both standard waveforms (function generator mode) and arbitrary waveforms. There are two distinctly different ways in which arbitrary waveforms can be produced: DDS and Variable Clock.Īrbitrary Generators: Direct Digital Synthesis (DDS) DDS offers fast switching between output frequencies, fine frequency resolution, and operation over a broad spectrum of frequencies.Īrbitrary generator describes a class of digital generator potentially capable of reproducing any waveform shape. Triangle waves and other waveforms are limited to a much lower frequency.ĭirect Digital Synthesis (DDS) is a method of producing an analogue waveform usually a sine wave by generating a time-varying signal in digital form and then performing a digital-to-analogue conversion. Basic generators only offer sine and square waves up to the maximum generator frequency. Digital generators use a digital to analogue converter (DAC) to generate a wave shape from values stored in memory.
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