Arbitrary Waveform Generator Block Diagram

These types of generators have limited bandwidth and costlier than function generators.

Arbitrary waveform generator block diagram.

While lacking some of the features in a modern autonomous signal generator front panel controls permit the operator to select any of a dozen or so waveforms in addition to arbitrary waveform creation. The basic block diagram of the dds based arbitrary waveform generator is shown below. Modern digital oscilloscopes generally contain a built in afg. The operation of the dds within the arbitrary function generator can be envisaged by looking at the way that phase progresses over the course of one cycle of the waveform.

With scripting a signal generator can respond to these digital control signals on the fly without stopping generation of its waveform. Figure 27 shows a block diagram of a test scenario where a signal generator produces a series of different signals conditional on digital control signals coming from the uut. Dds frequency synthesizer as used in an arbitrary function generator afg. An arbitrary waveform generator awg is a piece of electronic test equipment used to generate electrical waveforms.

It has a display screen that shows an exact picture of the arbitrary waveforms that helps in avoiding the chance of mistake while selecting waveform from memory. These waveforms can be either repetitive or single shot once only in which case some kind of triggering source is required internal or external. A digital representation of a waveform is loaded into awg memory through a variety of software applications such as matlab labview visual studio plus ivi and scpi. A common awg block diagram a closer look at each arbitrary waveform generator awg functional block 1.

Also frequency period amplitude and offset can be adjusted.