Arbitrary Waveform Generator Block Diagram

The basic block diagram of the dds based arbitrary waveform generator is shown below. 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. Dds frequency synthesizer as used in an arbitrary function generator afg.

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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.

Arbitrary waveform generator block diagram.

Modern digital oscilloscopes generally contain a built in afg. Also frequency period amplitude and offset can be adjusted. The memory is clocked at the highest sampling rate supported by. 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.

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 use of an arbitrary waveform generator is to stimulate a system with a complex waveform. These types of generators have limited bandwidth and costlier than function generators. These waveforms can be either repetitive or single shot once only in which case some kind of triggering source is required internal or external.

With scripting a signal generator can respond to these digital control signals on the fly without stopping generation of its waveform. The resulting waveforms can be injected into a device under test and analyzed as. 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. An arbitrary waveform generator awg is a piece of electronic test equipment used to generate electrical waveforms.

A common awg block diagram a closer look at each arbitrary waveform generator awg functional block 1.