Arbitrary Waveform Generator Diagram

Abstract we are developing an arbitrary waveform generator awg to provide enhanced capability for radar applications.

Arbitrary waveform generator diagram.

These arbitrary waveform generators are generally more flexible although they do have some limitations not possessed by the dds versions. This is a generator with two independent output channels which is a nice feature for stimulating two systems simultaneously. These waveforms can be either repetitive or single shot once only in which case some kind of triggering source is required internal or external. Variable clock arbitrary waveform generator the variable clock arbitrary function generator is the more flexible form of arbitrary waveform generator.

A function generator with the ability to generate arbitrary waveforms is the b k 4078 as shown in the picture below. The current design will accommodate two waveform generators on a single unit for dual frequency operation. In this model the two channels share a 4 10 5 byte memory for defining the arbitrary waveforms. The basic block diagram of the dds based arbitrary waveform generator is shown below.

A dds function generator is a digital arbitrary waveform generator meaning it uses a digital to analog converter dac to build a signal. I have 4 7 µf and 0 1 µf decoupling caps for each power ground pair. The memory is clocked at the highest sampling rate supported by. The resulting waveforms can be injected into a device under test and analyzed as.

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. An arbitrary waveform generator awg is a piece of electronic test equipment used to generate electrical waveforms. Dac sleep is driven directly by a microcontroller gpio. This guarantees that the constellation diagram is a square with edges parallel to the horizontal and vertical axes.

A common awg block diagram a closer look at each arbitrary waveform generator awg functional block 1. It also has read only memory rom where it stores amplitude values for specific waveforms at various time intervals based on a sampling frequency fs. 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. Otherwise it will be rotated by a fixed angle.

The basic architecture of this unit employs a field programmable gate array fpga and a high speed and high. The hdawg arbitrary waveform generator is capable of producing various digital modulation patterns such as qam ask and psk. Diagram taken from the datasheet. Here is the dac portion of my arbitrary waveform generator.