Function and arbitrary waveform generators are among the most important and versatile pieces of electronic test equipment. In electronic design and. Both function generators and oscilloscopes are highly sophisticated and technologically mature devices. Available online (large PDF) or by request. A function generator is usually a piece of electronic test equipment or software used to . is percent; ^ "Exar XR Monolithic Function Generator" (PDF).
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Microprocessor controlled Function Generator FD4E is provided with 4 digit LED display as well as serial interface RS 4 digit autoranging readout of. The Systems and Controls of a Mixed Signal Generator · · · 22 Creating Waveforms Using Mixed Signal Generators · · Creating. Part I - Introduction to the Function Generator. Overview: The function generator is used to generate a wide range of alternating-current (AC) signals. A diagram.
RF signal generators are required for servicing and setting up analog radio receivers , and are used for professional RF applications. AF Audio-frequency signal generators generate signals in the audio-frequency range and above.
Applications include checking frequency response of audio equipment, and many uses in the electronic laboratory. Equipment distortion can be measured using a very-low-distortion audio generator as the signal source, with appropriate equipment to measure output distortion harmonic-by-harmonic with a wave analyser , or simply total harmonic distortion.
A distortion of 0. This has led to the development of the vector signal generator, which is also known as a digital signal generator. In addition, since modern commercial digital communication systems are almost all based on well-defined industry standards, many vector signal generators can generate signals based on these standards. In contrast, military communication systems such as JTRS , which place a great deal of importance on robustness and information security, typically use very proprietary methods.
To test these types of communication systems, users will often create their own custom waveforms and download them into the vector signal generator to create the desired test signal. Digital pattern generator[ edit ] Main article: Digital pattern generator A logic signal generator or data pattern generator or digital pattern generator produces logic signals - that is logical 1s and 0s in the form of conventional voltage levels.
A digital pattern generator is used as stimulus source for digital integrated circuits and embedded systems - for functional validation and testing. Special purpose signal generators[ edit ] A pitch generator and a probe for locating a specific pair of wires amongst many, for example in a punch block. In addition to the above general-purpose devices, there are several classes of signal generators designed for specific applications.
Pitch generators and audio generators[ edit ] A pitch generator is a type of signal generator optimized for use in audio and acoustics applications. Sophisticated pitch generators will also include sweep generators a function which varies the output frequency over a range, in order to make frequency-domain measurements , multipitch generators which output several pitches simultaneously, and are used to check for intermodulation distortion and other non-linear effects , and tone bursts used to measure response to transients.
Such generators may include special signals to stimulate various digital effects and problems, such as clipping , jitter , bit errors ; they also often provide ways to manipulate the metadata associated with digital audio formats. The term synthesizer is used for a device that generates audio signals for music, or that uses slightly more intricate methods. Computer programs[ edit ] Computer programs can be used to generate arbitrary waveforms on a general-purpose computer and output the waveform via an output interface.
Such programs may be provided commercially or be freeware. Simple systems use a standard computer sound card as output device, limiting the accuracy of the output waveform and limiting frequency to lie within the audio-frequency band.
There are several different types of video signal generators in widespread use. Regardless of the specific type, the output of a video generator will generally contain synchronization signals appropriate for television, including horizontal and vertical sync pulses in analog or sync words in digital.
Video signal generators are available for a wide variety of applications, and for a wide variety of digital formats; many of these also include audio generation capability as the audio track is an important part of any video or television program or motion picture. General Radio. Archived PDF from the original on December 18, RF generators for higher frequencies are not function generators in the strict sense since they typically produce pure or modulated sine signals only.
Function generators, like most signal generators , may also contain an attenuator , various means of modulating the output waveform, and often the ability to automatically and repetitively "sweep" the frequency of the output waveform by means of a voltage-controlled oscillator between two operator-determined limits.
This capability makes it very easy to evaluate the frequency response of a given electronic circuit. Some function generators can also generate white or pink noise.
They use direct digital synthesis DDS techniques to generate any waveform that can be described by a table of amplitudes.
Specifications[ edit ] Typical specifications for a general-purpose function generator are: Produces sine, square, triangular, sawtooth ramp , and pulse output. Arbitrary waveform generators can produce waves of any shape.
For example, the Tektronix FG ca covers 0. Some function generators can be phase locked to an external signal source, which may be a frequency reference or another function generator.
Output amplitude up to 10 V peak-to-peak. Amplitude can be modified, usually by a calibrated attenuator with decade steps and continuous adjustment within each decade. Some generators provide a DC offset voltage, e.