Oscilloscope

Function generator is defined as an electronic device or equipment that generates waveforms primarily used in hybrid computers, automatic control systems, decoding devices, analog computers, coding gadgets, regulation system, remote controls, and measuring equipment.



Uses of function generator:

When one needs constant and cyclical signals, efficient and effective works can be accomplished by utilizing this device. The function generator is mostly employed in various applications such as research projects, development programs, instructive classes, seminars, repair businesses, sidelines, stimuli testing, frequency response checking, and ‘in circuit’ signal insertions.

This is used primarily by technicians and electrical engineers in analyzing, testing, and observing equipment. If electronic gadgets malfunction, do not accept signals, or even stopped working, this device will help in solving these problems. Moreover, this is also employed in measuring feedbacks produced by microphones, amplifiers, musical instruments and other electronic devices.

Two categories of function generator:

Analogue generator - This type is utilized to generate triangular waveforms. This wave is produced through repetitive charging and discharging of capacitor from a stable power source. Therefore, an ascending as well as a descending power slope is being formed. Varying frequencies can be acquired through changing the current and capacitor’s size.

Digital function generator – This one is equipped with exterior VCF function or Voltage Control Frequency. It modulates output waveforms and can perform automatic as well as repetitive removal of frequencies between two limits established by the operator. It is capable of signal inversions, two steps attenuation, changeable reductions and other function controls.

Advantages of analogue function generator:

Initial costs are cheaper compared to the digital type.
It is simple to use.

This type offers users instant frequency as well as amplitude controls.
There are no high frequency restrictions especially with non-sinusoidal forms of waves.

Disadvantages of analogue function generator:

It is equipped with more components compared to the digital type. Therefore, it is more prone to damages as time goes by.
Due to its sensitivity to thermal changes, it requires frequent maintenance.

Advantages of digital function generator:

Accuracy as well as stability of frequencies is obtainable in this type.
This can also produce larger amount of standard waveforms.
Versatile technique called DDS or Direct Digital Synthesis may be utilized.
Numerous techniques can be used.
It usually derives frequencies from crystal clocks through its techniques.
It utilizes phase accumulators.
This presents users high quality spectra, less sounds, and agile frequencies.

Disadvantages of digital function generator:

It has complex design, thus usage may seem more difficult.
Due to its complexity, the possibility of problems may occur when traditional tests are done.
Its maximum capacity for handling frequencies has limitations. It is restricted to few wave forms.

Signal generator versus function generator:

Both devices utilize oscilloscopes for troubleshooting purposes. These two make efficient work surfaces available for users and lessen the need to carry equipment in testing shops. These two may seem alike, but they have significant differences.

For checking electronic equipment, a signal generator may produce RF or audio frequencies. However, capabilities may depend on the design and purpose of the generator. On the other hand, the latter type of generator provides transistor to transistor pulses that are in square wave form. To accomplish testing rationale, this generator creates wave forms such as sine and saw tooth.

Step by step procedure in using a function generator:

1.Push the power button to open.
2.Ensure the generator’s configuration based on desired waves specifications.
3.For control checking, connect the lead as well as the ground lead to the oscilloscope.
4.Link the signal lead of the generator to the apparatus to be tested.
5.Connect generator’s ground lead to the other ground intended for the tested apparatus.
6.If a negative lead occurred, attach the device to the ground.
7.After the generator successfully received impulses, note observations.

Affordable function generator:

These devices are available in wide range of designs, models, capacities, and prices. Some have special features, while some are in software forms. Those that are in software forms cost less. However, these have partial capabilities and are primarily used for adjusting audio ranges. Another one is the black box generator that is designed for portable computers, but includes limitations. The benefit of this is its low power consumption. Affordable generators are great choices for those students as well as people with tight budget.