Using a scope to display lissajous patterns electrical. The vector synthesis library allows the creation and manipulation of 2d and 3d vector shapes, lissajous figures, and scan processed image and video inputs using audio signals sent directly to oscilloscopes, vectrex game consoles, ilda laser displays, or oscilloscope emulation softwares using the pure data programming environment. If the frequency of the horizontal plates is 1500hz, determine the frequency of the vertical plates. An oscilloscope is analogous to a camera that captures signal images that we can then observe and interpret. While its specific to that scope, it still provides a nice. A very simple characterization of this instrument is to say that it is a graphing voltmeter, plotting a graph. This video takes a fairly detailed look at the basics of lissajous patterns on an oscilloscope.
Lissajous art creatorplayground only works in browsers that support the html5 canvas tag. Lissajous figures where a 1, b n n is a natural number and 2 1 s g n n 3 lissajous curves can also be generated using an oscilloscope as illustrated. When both pairs of the deflection plates horizontal deflection plates and vertical deflection plates of cro cathode ray oscilloscope are connected to two sinusoidal voltages, the patterns appear at cro screen are called the lissajous pattern. The simplest lissajous patterns appear in the oscilloscope display when the frequencies of the signals are the same, i. A labview based simulation of lissajous pattern using daq card. Ga1102cal users manual a users manual for attens ga1102cal 100mhz oscilloscope. Jules antoine lissajous 18221880 was a french physicist who was interested in waves, and around 1855. Liassajou curves are described by the parametric equations below. Lissajous patterns at the dawn of the technological revolution. Lissajous patterns experiment 3 linkedin slideshare. The horizontal and vertical inputs, the time base generator, the trigger, oscilloscope input impedance, oscilloscope probe, pdf file. This tutorial is a threedimensional simulation of a cathode ray oscilloscope producing lissajous figures as it compares sinusoidal voltages. Chapter 2 tutorial the oscilloscope is one of the most useful and versatile test instruments for electronic work. How to use an oscilloscope youtube great oscope explanation straight from the makers of scopes tektronix.
At each instant, the scope plots a dot with the input x sample as the horizontal coordinate and the output. Measuring relative phase between oscilloscope traces using the lissajous. The manual provided with your oscilloscope will give you. In most oscilloscopes that have this capability, the frequency domain is accessed by pressing a button labeled math. Lissajous is a complex audiovideo signal generator built in maxmsp and inspired by the work of jules antoine lissajous. It explores the field of harmony and disorder and let the user dip into an elegant, dreamlike. Lissajous pattern generator this is a dual, sine wave oscillator that generates audio signals of 4500hz and 1500hz. Each cycle object is independent with controls for frequency, phase and amplitude. Mastercam 2017 beginner training tutorial the mastercam 2017 beginner training tutorial provides a comprehensive stepbystep approach to learning the basics of three mastercam modules. Sound card oscilloscope pdf download free pdf books. Able to display the voltage of one channel vertically and the other channel horizontally. Faculty of engineering chulalongkorn university cathoderay oscilloscope cro objectives you will be able to use an oscilloscope to measure voltage, frequency and phase on a variety of displayed waveforms introduction the oscilloscope is the basic instrument for the study of all types of waveforms. Beginner oscilloscope tutorial contd once youve learned the basic oscilloscope controls, here are a few other things that you should know about. When this condition is met and when the phase shift is 0, the display consists of a straight line sloping upward from the left side of the screen to the right side.
Faculty of engineering chulalongkorn university cathode. Such an instrument is obviously useful for the design and. To use lissajous figures to take phase measurements. You will learn what an oscilloscope is and how to use oscilloscopes. Tutorial from the nhmfl physics applet by chiuking ng. Jules lissajous and his figures j ules antoine lissajous 18221880 is not among the giants in the history of science, yet his name is known to physics students through the lissajous. For few lissajous figures based on their shape, we can directly tell the phase difference between the two sinusoidal signals. This oscilloscope tutorial includes all the benefits of being a cleveland institute of electronics student including earning a professional certificate of completion from cie bookstore upon finishing, live instructor assistance via telephone, email or chat room, and superior student privileges so you never have to study alone.
To change the viewing angle, click and drag the figure. Since its invention more than 100 years ago, new types, features and functionalities have been introduced. On digital scopes, there may be a pushbutton, but you may have to locate the options in a menu. Oscilloscope tutorial iit kharagpur part 1 of 2 youtube. Lissajous figures where a 1, b n n is a natural number and. Lissajous curves can also be generated using an oscilloscope. An oscilloscope, previously called an oscillograph, and informally known as a scope or oscope, cro for cathoderay oscilloscope, or dso for the more modern digital storage oscilloscope, is a type of electronic test instrument that graphically displays varying signal voltages, usually as a twodimensional plot of one or more signals as a function of time. A labview based simulation of lissajous pattern using daq. Maximum bandwidth of an oscilloscope is defined as the frequency at which a sinusoidal input signal amplitude is attenuated by 3db so what does this mean. Push the frontpanel default setup button to set the oscilloscope to a known starting point. On older analog scopes, these are mostly controlled by a dedicated switch for each function. Geometrical and graphical representations analysis of. In the system of parametric equations, the variables affect the outcome of the lissajous figure in different ways. Lissajous patterns of cro or cathode ray oscilloscope.
For each of the remaining graphs, the frequencies are harmonically related, that is the term multiplying t is a rational number. Basics of lissajous patterns on an oscilloscope youtube. Using an oscilloscope tips and tricks for someone using an oscilloscope for the first time. In order to accurately examine the function of a variable one needs to graph the system of parametric equations below while keeping.
Dec 06, 2011 part 1 of oscilloscope tutorial from the department of electronics and electrical communication engineering at indian institute of technology iit kharagpur. To restore the figure to the original view, click the front view button. Oscilloscope lexicon a glossary covering some of the more common oscilloscope characteristics. No manual reading of values from display can be automated.
The oscilloscope vision is the art of seeing things invisible. Using your code to investigate lissajous gures and beats, as described below, and produce plots illustrating the conclusions you draw. Lissajous pattern named for french physicist jules antoine lissajous. Therefore, the graph is a repeating function for some multiple of 2. To use lissajous figures to take frequency measurements. Two phaseshifted sinusoid inputs are applied to the oscilloscope in xy mode and the phase relationship between the signals is presented as a lissajous figure.
Anatomy of an oscope an overview of the most critical systems on an oscilloscope the screen, horizontal and vertical controls, triggers, and probes. Heres a project with same purpose but instead, use the soundcard of your pc and software attached. We can connect a function generator to both the x and y axis and begin to draw lissajous patterns. The manual provided with your oscilloscope will give you more specific information. Whether a product is simple or complex, if it includes electronic components, the design, verification, and debugging process requires an oscilloscope to analyze the numerous electrical signals. Lissajous patterns of cro or cathode ray oscilloscope electrical4u. Oscilloscope rise time specifications are directly related to bandwidth. Part 1 of oscilloscope tutorial from the department of electronics and electrical communication engineering at indian institute of technology iit kharagpur.
For example, in the harmonic case with equal frequencies, one has a continuous change from a straight line seg. Lissajous curves can also be generated using an oscilloscope as illustrated. This is a dynamic lissajous emulator in the sense that the waveform is obtained by combining 2 time varying sinusoidal waves with different frequencies. The oscilloscope is an essential tool if you plan to design or repair electronic.
This page can be used as a playground or learning tool to see how changing basic parameters affects the generated images. Example of an analog oscilloscope lissajous figure, showing a harmonic. Some lowspeed waveforms are used so that the trace movement that draws the lissajous figures can be seen and understood. Lissajouslike gures with triangular and square waves.
Lissajous art peter elsea 112608 2 figure 1 is a basic lissajous generator. Analog arts has a mission to publish a series of helpful, original, and interesting articles, videos, and tutorials. We can do the following two measurements from a lissajous figure. This tutorial covers mainly the electronic instruments, which are useful for measuring either electrical quantities or parameters.
An octopus circuit can be used to demonstrate the waveform images on an oscilloscope. Aug 11, 2016 the simplest lissajous patterns appear in the oscilloscope display when the frequencies of the signals are the same, i. Jules antoine lissajous 18221880 was a french physicist who. Lissajouslike gures with triangular and square waves 37023 another interesting point to mention is the lack of continuity of the square lissajouslike. This is an article about lissajous curves lissajous curves sometimes also known as lissajous figures or bowditch curves, are pretty shapes first investigated by nathaniel bowditch in 1815, and later and in much more detail by jules antoine lissajou in 1857. To connect a probe that uses a bnc connector, push and turn the probe connector until it slides on the oscilloscope channel input connector. Two phaseshifted sinusoid inputs are applied to the oscilloscope in xy mode and the phase relationship between the signals is. However, most oscilloscope will allow you to supply an external input that will allow you to directly control the x axis.
Oscilloscope tutorial oscilloscope tutorial, how does an oscilloscope work. Now lets explore how the lissajous figure could aid one with only an oscilloscope to discover relationships between two signals. Nearly all consumer products today have electronic circuits. Oscilloscope fundamentals case school of engineering.
Or it can be used to create and save your own lissajous artwork. This application note provides an overview of basic oscilloscope fundamentals. These tutorials will help you learn more about oscilloscope basics and compare oscilloscope models from key industry definitions to fundamental measurement concepts, such as how to use an oscilloscope and how an oscilloscope works. Lissajous figure on an oscilloscope, displaying a 3. Named after jules antoine lissajous, a lissajous curve. The xyzs of oscilloscopes pdf a great indepth introduction to oscilloscopes. Cro cathode ray oscilloscope oscilloscope cathodique. Measuring relative phase between two waveforms using an. Aug 07, 2018 cathode ray oscilloscope cro is very important electronic device. Already this first instrument contained an impressive number of achievements and innovations in circuitry to be found in every oscilloscope to this date witnessing a profound understanding of the fundamentals of electronics. This property is exploited to produce a set of points, called padua points, at which a function may be sampled in order to compute either a bivariate interpolation or quadrature of the function over the domain. A simple crt is shown in figure below when both pairs of the deflection plates horizontal deflection plates. Cro is very useful to analyze the voltage wave form of different signals.
Lissajous figures by jed margolin in the old days, whenever they showed an engineer working, there was usually an oscilloscope nearby with a pattern on the screen. Shape of these lissajous pattern changes with changes of phase difference between signal and ration of frequencies applied to the deflection. Most oscilloscopes display two voltage waveforms at a time. Mastercam 2017 lathe training tutorial pdf book description. Whether a product is simple or complex, if it includes electronic components, the design, verification, and debugging process requires an oscilloscope to analyze the numerous electrical signals that make the product come to life. Swift 16671745 objective to learn to operate a cathode ray oscilloscope. Theory the oscilloscope, or scope for short, is a device for drawing calibrated graphs of voltage vs time very quickly and conveniently.