Signal generators are very beneficial in research
Author: bncscientific | Posted: 05.06.2012Popularly known as function generators, signal generators are instruments used for producing electronic signals. Majorly
used in gadgets for testing & repair of devices, these have now days been used for creative purposes as well.
For simple purposes a single type of generator could be used. However a combination of multiple generators is required in complex instruments used in scientific research and analysis procedures. These are of various types depending upon their utility.
Most common type is an audio signal generator which finds application in various machines used for sound testing along with scientific tools. Somebody working in sound testing is sure to employ such type of generator which has a frequency range greater than human ear, i.e. >20 to 20,000 cycles per second. To produce waveforms including sine, square, saw-tooth & triangle, it has separate regions. While high purity wave forms are produced by signal generators, on other hand a static signal is produced by noise generator, covering entire audio range. A special use that these noise generators have is in psychometrics, used to analyze psychological behavior and abilities.
Spanning a frequency range that is even higher than an audio gen., a radio signal generator is used in radio transmission checks. These are costlier as radio frequencies are difficult to generate with accuracy. Such type of device has in built modulators for frequency and amplitude & provides work for in broadcast testing.
Digitalized generators that create wave-shapes to form a data table are called arbitrary wave generators. These are different from regular generators in a way that they produce fixed set of wave-forms whereas arbitrary ones create wave shapes which can be produced at desired frequency.
Generators that produce wave frequencies in range of gigahertz fall under microwave signal generator. These are employed in highly complex and expensive devices like radar or communication systems. Engineers use logic signal producers for building products related to computers. Variety of high frequency pulses are made by them. These are related to external data sources. The signal produced can be adjusted according to frequency, modulations, wave-forms; impedance as well as output voltage thus is an important tool in electronic hardware testing equipments.
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