Arbitrary Waveform Generator Block Diagram

An arbitrary waveform generator awg is a piece of electronic test equipment used to generate electrical waveforms.

Arbitrary waveform generator block diagram.

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. 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. Modern digital oscilloscopes generally contain a built in afg.

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. With scripting a signal generator can respond to these digital control signals on the fly without stopping generation of its waveform. 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. A common awg block diagram a closer look at each arbitrary waveform generator awg functional block 1.

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 resulting waveforms can be injected into a device under test and analyzed as. These types of generators have limited bandwidth and costlier than function generators. Also frequency period amplitude and offset can be adjusted.

The basic block diagram of the dds based arbitrary waveform generator is shown below.