The black boxes are next in cost and have the advantage of portability and low power. They are also the most limited in frequency capabilities, often just spanning the audio range. The software-only function generators tend to be the least expensive and can be attractive for students and hobbyists on a budget. There are also inexpensive kits for hobbyists.
MULTISIM FUNCTION GENERATOR SOFTWARE
Some are dedicated instruments (the ones we will look at in more detail), some are black boxes with USB interfaces and an output terminal, some are plugged into computer or instrumentation buses, and some are software programs that run on a PC to generate waveforms on the parallel port or via a sound card. There are a variety of function generators on the market spanning the cost range from a few tens of dollars to tens of thousands of dollars. An appendix provides a glossary of terms related to function generators. A final section discusses common questions. The next section is on applications and contains the majority of the material in this guidebook.
MULTISIM FUNCTION GENERATOR GENERATOR
Next, we will look at the theory of how a DDS function generator works. This guidebook is useful to those with little knowledge of function generators, as well as the experienced technician or engineer who wishes to refresh his/her memory or explore new uses for function generators and more sophisticated arbitrary waveform generators.įirst, we will explain the controls of a typical function generator. To use a function or arbitrary waveform generator to its best advantage, the user should have a basic understanding of the instrument's controls, features, and operating modes. Stimulus/response testing, frequency response characterization, and in-circuit signal injection.Electronic and electrical equipment repair businesses.More advanced models offer a variety of additional waveforms and Arbitrary Waveform Generators can supply user-defined periodic waveforms.įunction generators are used where stable and repeatable stimulus signals are needed. Many generators include extra features, such as higher frequency capability, variable symmetry, frequency sweep, AM and FM operation, and gated burst mode. Today's basic units are capable of sine, square, and triangle outputs from less than 1 Hz to at least 1 MHz, with variable amplitude and adjustable DC offset. Modern DDS (direct digital synthesis) function generators are able to provide a wide variety of signals. The signal levels needed range from microvolts to tens of volts or more. The testing of physical systems and transducers often needs stable and reliable signals. In electronic design and troubleshooting, the circuit under scrutiny often requires a controllable signal to simulate its normal operation. What should I look for when buying an arbitrary waveform generator?įunction and arbitrary waveform generators are among the most important and versatile pieces of electronic test equipment.Tell me a little more about frequency modulation.How do I lock my generator to another generator?.How do I get pulses using my function generator?.There's a lot of ringing on my pulses/square waves.System response testing with square wave.Using DDS generators and digital oscilloscopes.Response testing with function generators.
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