Arbitrary Waveform Generator Diagram

This is a generator with two independent output channels which is a nice feature for stimulating two systems simultaneously.

Arbitrary waveform generator diagram.

Diagram taken from the datasheet. The basic block diagram of the dds based arbitrary waveform generator is shown below. The resulting waveforms can be injected into a device under test and analyzed as. Just take a look at the timing diagram life may be complicated but this data interface certainly is not.

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. Dac sleep is driven directly by a microcontroller gpio. These waveforms can be either repetitive or single shot once only in which case some kind of triggering source is required internal or external. Here is the dac portion of my arbitrary waveform generator.

Dds frequency synthesizer as used in an arbitrary function generator 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. This guarantees that the constellation diagram is a square with edges parallel to the horizontal and vertical axes. A function generator with the ability to generate arbitrary waveforms is the b k 4078 as shown in the picture below. Otherwise it will be rotated by a fixed angle.

The word arbitrary denotes a user s ability to create waveforms beyond the permanent contents of the instrument s internal memory. In this model the two channels share a 4 10 5 byte memory for defining the arbitrary waveforms. I have 4 7 µf and 0 1 µf decoupling caps for each power ground pair. The current design will accommodate two waveform generators on a single unit for dual frequency operation.

These arbitrary waveform generators are generally more flexible although they do have some limitations not possessed by the dds versions. Variable clock arbitrary waveform generator the variable clock arbitrary function generator is the more flexible form of arbitrary waveform generator. The memory is clocked at the highest sampling rate supported by. Signal generators are subdivided into categories that include arbitrary function generators afgs and arbitrary waveform generators awgs.

The basic architecture of this unit employs a field programmable gate array fpga and a high speed and high. A common awg block diagram a closer look at each arbitrary waveform generator awg functional block 1. The hdawg arbitrary waveform generator is capable of producing various digital modulation patterns such as qam ask and psk. An arbitrary waveform generator awg is a piece of electronic test equipment used to generate electrical waveforms.