This manual describes the functions, features, and operation of the AFG1022 Arbitrary Function Generator. The heart of the function generator is a VCG (voltage-controlled generator) that produces precision sine, square, or triangle waves over the 0.2Hz to 20MHz range. This encompasses subaudible, audio, ultrasonic, and RF applications. A continuously variable dc offset allows the output to be injected directly into circuits at the. Model 114A User Manual; Model 114B User Manual; Model 117B User Manual; Model 205 User Manual; Model 206 User Manual; Model 230A User Manual; Model 231 User Manual; Model 231A User Manual; Model 240 User Manual; Model 240A User Manual; Model 253x User Manual; Model 253xB User Manual; Model 254x User Manual; 254xB-GEN Series User Manual; 254xB.

• Function Generator Online
• Bk Precision 3010 Function Generator Manual
• 33120a Function Generator Manual
• Fg-100 Dds Function Generator Manual

1. Today's designs are often complex, demanding a variety of stimulus signals during test. With standard waveforms, arbitrary waveform capability and signal impairment options, a Tektronix Function Generator supports a wide range of application needs with one instrument.
2. The HP 33120A is a high-performance 15 MHz synthesized function generator with built-in arbitrary waveform capability. Its combination of bench-top and system features makes this function generator a.
3. In this post we're going to take a look and review a XR2206 Function Generator DIY kit. A function generator can be an expensive piece of hardware, specially for electronics hobbyists or beginners.
4. A function generator is usually a piece of electronic test equipment or software used to generate different types of electrical waveforms over a wide range of frequencies. Some of the most common waveforms produced by the function generator are the sine wave, square wave, triangular wave and sawtooth shapes.

A function generator is usually a piece of electronic test equipment or software used to generate different types of electrical waveforms over a wide range of frequencies. Some of the most common waveforms produced by the function generator are the sine wave , square wave, triangular wave and sawtooth shapes. These waveforms can be either repetitive or single-shot (which requires an internal or external trigger source).^[1]Integrated circuits used to generate waveforms may also be described as function generator ICs.

In addition to producing sine waves, function generators may typically produce other repetitive waveforms including sawtooth and triangular waveforms, square waves, and pulses. Another feature included on many function generators is the ability to add a DC offset.

Although function generators cover both audio and RF frequencies, they are usually not suitable for applications that need low distortion or stable frequency signals. When those traits are required, other signal generators would be more appropriate.

Some function generators can be phase-locked to an external signal source (which may be a frequency reference) or another function generator.^[2]

Function generators are used in the development, test and repair of electronic equipment. For example, they may be used as a signal source to test amplifiers or to introduce an error signal into a control loop. Function generators are primarily used for working with analog circuits, related pulse generators are primarily used for working with digital circuits.

• 1Electronic instruments
• 2Circuit elements

Function Generator Online

Electronic instruments[edit]

Bk Precision 3010 Function Generator Manual

Working[edit]

Simple function generators usually generate triangular waveform whose frequency can be controlled smoothly as well as in steps.^[3] This triangular wave is used as the basis for all of its other outputs. The triangular wave is generated by repeatedly charging and discharging a capacitor from a constant current source. This produces a linearly ascending and descending voltage ramp. As the output voltage reaches upper or lower limits, the charging or discharging is reversed using a comparator, producing the linear triangle wave. By varying the current and the size of the capacitor, different frequencies may be obtained. Sawtooth waves can be produced by charging the capacitor slowly, using a current, but using a diode over the current source to discharge quickly - the polarity of the diode changes the polarity of the resulting sawtooth, i.e. slow rise and fast fall, or fast rise and slow fall.

A 50% duty cyclesquare wave is easily obtained by noting whether the capacitor is being charged or discharged, which is reflected in the current switching comparator output. Other duty cycles (theoretically from 0% to 100%) can be obtained by using a comparator and the sawtooth or triangle signal. Most function generators also contain a non-linear diodeshaping circuit that can convert the triangle wave into a reasonably accurate sine wave by rounding off the corners of the triangle wave in a process similar to clipping in audio systems.

A typical function generator can provide frequencies up to 20 MHz. 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.^{[citation needed]}

More advanced function generators are called arbitrary waveform generators (AWG). 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.^[2]
• It can generate a wide range of frequencies. For example, the Tektronix FG 502 (ca 1974) covers 0.1 Hz to 11 MHz.^[4]
• Frequency stability of 0.1 percent per hour for analog generators^[4] or 500 ppm for a digital generator.
• Maximum sinewave distortion of about 1% (accuracy of diode shaping network) for analog generators.^[5] Arbitrary waveform generators may have distortion less than -55 dB below 50 kHz and less than -40 dB above 50 kHz.
• Some function generators can be phase locked to an external signal source, which may be a frequency reference or another function generator.
• Amplitude modulation (AM), frequency modulation (FM), or phase modulation (PM) may be supported.
• Output amplitude up to 10 Vpeak-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.g. adjustable between -5V to +5V.^[2]
• An output impedance of 50 Ω.

Software[edit]

A completely different approach to function generation is to use software instructions to generate a waveform, with provision for output. For example, a general-purpose digital computer can be used to generate the waveform; if frequency range and amplitude are acceptable, the sound card fitted to most computers can be used to output the generated wave.

Circuit elements[edit]

Waveform generator[edit]

An electronic circuit element used for generating waveforms within other apparatus that can be used in communications and instrumentation circuits, and also in a function generator instrument. Examples are the Exar XR2206^[6] and the Intersil ICL8038 integrated circuits^{[citation needed]}, which can generate sine, square, triangle, ramp, and pulse waveforms at a voltage-controllable frequency.

33120a Function Generator Manual

Function generator[edit]

An electronic circuit element that provides an output proportional to some mathematical function (such as the square root) of its input; such devices are used in feedback control systems and in analog computers. Examples are the Raytheon QK329 square-law tube^[7] and the Intersil ICL8048 Log/Antilog Amplifier.^[8]

Mechanical function generators[edit]

Mechanical function generators are linkages, cam-follower mechanisms or non-circular gears, designed to reproduce different types of functions, either periodic (like sine or cosine functions), or single-shot (logarithm, parabolic, tangent functions etc.).^[9]

Measurement instruments like pressure gauges, altimeters and barometers include linkage-type function generators as linearization means. Before the advent of digital computers, mechanical function generators were used in the construction of gun fire control systems, and mechanical calculators.

Fg-100 Dds Function Generator Manual

• Four-bar function generator of the function Log(u) for 1 < u < 10.

• Rocker-slider function generator of the function Log(u) for 1 < u < 10.

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• Slider-rocker function generator of the function Tan(u) for 0 < u < 45°.

See also[edit]

References[edit]

1. ^cnx.org - Using a Basic Function Generator, 2005-08-21
2. ^ ^abcBakshi, U. A.; Bakshi, A. V.; Bakshi, K. A. (2008). Electronic Measurements and Instrumentation. Pune, India: Technical Publications. pp. 3–26, 3–27. ISBN978-81-8431-435-9.
3. ^Sonde, B. S. (1992). Introduction to System Design Using Integrated Circuits. New Age International. pp. 244–246. ISBN978-81-224-0386-2.
4. ^ ^abFG 502 Function Generator, Instruction Manual, Beaverton, OR: Tektronix, 1973, pp=1-7–1-8
5. ^FG 502 distortion is 0.5 percent
6. ^'Exar XR-2206 Monolithic Function Generator'(PDF). Exar. Retrieved 16 June 2013.
7. ^Miller, Joseph A.; Soltes, Aaron S.; Scott, Ronald E. (February 1955). 'Wide-band Analog Function Multiplier'(PDF). Electronics. Retrieved 15 June 2013.
8. ^'Intersil ICL8048 Log Amplifier'(PDF). Intersil. Retrieved 16 June 2013.
9. ^Simionescu, P.A. 'A restatement of the optimum synthesis of function generators with planar four-bar and slider-crank mechanisms examples'(PDF). International Journal of Mechanisms and Robotic Systems. Inderscience Publishers (IEL). 3 (1): 60–79. doi:10.1504/IJMRS.2016.077038.

External links[edit]

• Rostky, George (March 13, 2001), Design classics: the function generator, EE Times, retrieved March 31, 2012. History of the function generator.