Oscilloscope and Signal Generator in Labview

7/22/2019 Oscilloscope and Signal Generator in Labview

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OscilloscopeThe oscilloscope is basically a

graph-displaying device - it

draws a graph of an electrical

signal. In most applications the

graph shows how signals change

over time: the vertical (Y) axis

represents voltage and thehorizontal (X) axis represents

time. The intensity or brightness

of the display is sometimes

called the Z axis.

This simple graph can tell you many things about a signal. Here are a few:

You can determine the time and voltage values of a signal. You can calculate the frequency of an oscillating signal. You can see the "moving parts" of a circuit represented by the signal. You can tell if a malfunctioning component is distorting the signal. You can find out how much of a signal direct current (DC) or alternating

current (AC) is.

You can tell how much of the signal is noise and whether the noise ischanging with time.

Signal Generator :Signal generators, also known variously as function generators, RF and microwave

signal generators, pitch generators, arbitrary waveform generators, digital pattern

generators or frequency generators are electronic devices that generate

repeating or non-repeating electronic signals (in either the analog or digital

domains). They are generally used in designing, testing, troubleshooting, and


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repairing electronic or electroacoustic

devices; though they often have artistic uses

as well.

There are many different types of signal

generators, with different purposes andapplications (and at varying levels of

expense); in general, no device is suitable for

all possible applications.

Traditionally, signal generators have been

embedded hardware units, but since the age of multimedia-PCs, flexible,

programmable software tone generators have also been available.

General purposes of signal generator are :

Function generators Arbitrary waveform generators RF and microwave signal generators. Analog signal generators Vector Signal Generator Logic Signal Generator

Main Theme:

This is not a usual Oscilloscope or signal generator we used in our daily life but

actual it is good to call this as Techno-Oscilloscope and Signal Generator but

of the functions built in them Signal generator can be improved up to

numerous signal generations simultaneously and similarly for Oscilloscopes

channels as well.

Why did I choose this project?

This is a wise question actually we recently covered semester subject

Signal and System and all the tools we studied in this subject are available in

LabVIEW with GUI therefore we decided to make Oscilloscope which

emphasizes on the dual measurements like phase, magnitude, Cross-

Correlation and Convolution and single signal measurements like FFT analysis

and auto Correlation with all other functions that are usually available in our


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Oscilloscope and likewise a signal generator which can generate a signal signal

of all kinds and in addition it can add noise of any kind.

How we started?Out main target was to generate a simple signal and visualize it on Oscilloscope

then we put a noise option and again visualize it one channel one signal with noise

a very simple Oscilloscope and signal generator indeed and then we found a good

plateform and converted into a technical and highly prcised instrument.

Screenshots:

Front panel:

This picture show the whole front panel including signal generator and

Oscillscope.

Oscilloscope :

This part is actually called Oscilloscope.


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Signal Generator:

This part is called Signal Generator.

SUB VI and VI hierarchy:

There are five sub VI which are attached with email

these are following

Dual Measurements Tone measurements Autocorrelation Signal Measurements Formula


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Working of project through Block Diagram:

This can be explained step by step.

1. Firstly signal generator was designed using case structure and this signalgenerator was capable to generate two signal at a time and case structure

was built so that we could get following signals.

Sine Saw Tooth Square Wave Triangular Wave

DC2. Then we added noise by using formula block and another signal simulator

and it is capable of generating

Gaussian Noise

,

Uniform Noise

,

MLS

,Inverse F, Poisson Noise and Random Noise.3. Then two signal with noise option these were fed in another case structure

in order to select channel 1 or channel 2


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4. Each channel is capable for showing AC and DC part of wave with separatetrigger option and also invert option and all these features were installed incase structure of each channel.

5. Then both the signals are fed for Cross Correlation, Combined signalimaging and Convolution which can be visualized in oscilloscope waveform

graph.


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6. And also both signals for dual measurements including magnitude andphase are fed in dual measurement formula and can be seen in dualmeasurement Waveform graph.

7. At the bottom of Channel selection case structure there are some Waveformgraph properties to select x-axis and y-axis.

8. The signal which is selected by selecting channel was fed in tonemeasurement, signal measurement in order to measure following parameters

Amplitude Frequency Phase Maximum Minimum Peak to peak Total Samples RMS value DC offset Standard Deviation Arithmetic mean

How should it start?It is again a very important question follow the following steps

Run the Project Decide noise, AC/DC parts at channel tab It is assumed that signal 1 is at channel 1 and signal is at channel 2 Select signal 1 at right bottom Select channel 1 from Oscilloscope pull button and from slider also Generate your own signal

Future Idea:

We developed this Virtual oscilloscope and signal generator in a such a waythat it can easily be extended to numerous signal and channels simultaneously

and this is not enough each year as LabVIEW will be upgraded this VI will also


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be enhanced and upgraded more dual and singleton operations can be added

including

Circular Convolution Periodic Convolution Bode Plot Increase channels and signal generations

Contributions:

Two students are involved in this project

Ali Shafique (2011-EE-86) Zeeshan Israr (2011-EE-79)

As far as contribution is concerned so I would say this is purely a team workwe both effort hard for this project and our contribution is equal in all aspects

of project preparation.

References:http://uenics.evansville.edu/~amr63/equipment/scope/oscilloscope.html

http://en.wikipedia.org/wiki/Signal_generator

http://www.youtube.com/watch?v=u-AzZV-Ooyk

http://www.youtube.com/watch?v=lMcIcV8AAW4

http://www.youtube.com/watch?v=1TDzdOfm8TU

http://www.youtube.com/watch?v=OCMOxKLCwrM

http://www.youtube.com/watch?v=E1O4frOtTO4

http://www.youtube.com/watch?v=9zKpOP78DXM

http://www.youtube.com/watch?v=C56ndkhNn9w

Subscription ofbmanishap and pianoman

http://www.youtube.com/channel/UCbkz3W7TR2qf91Y_Sa7M8fA

http://www.youtube.com/watch?v=hKiOQXfzdzI
http://uenics.evansville.edu/~amr63/equipment/scope/oscilloscope.htmlhttp://uenics.evansville.edu/~amr63/equipment/scope/oscilloscope.htmlhttp://en.wikipedia.org/wiki/Signal_generatorhttp://en.wikipedia.org/wiki/Signal_generatorhttp://www.youtube.com/watch?v=u-AzZV-Ooykhttp://www.youtube.com/watch?v=u-AzZV-Ooykhttp://www.youtube.com/watch?v=lMcIcV8AAW4http://www.youtube.com/watch?v=lMcIcV8AAW4http://www.youtube.com/watch?v=1TDzdOfm8TUhttp://www.youtube.com/watch?v=1TDzdOfm8TUhttp://www.youtube.com/watch?v=OCMOxKLCwrMhttp://www.youtube.com/watch?v=OCMOxKLCwrMhttp://www.youtube.com/watch?v=E1O4frOtTO4http://www.youtube.com/watch?v=E1O4frOtTO4http://www.youtube.com/watch?v=9zKpOP78DXMhttp://www.youtube.com/watch?v=9zKpOP78DXMhttp://www.youtube.com/watch?v=C56ndkhNn9whttp://www.youtube.com/watch?v=C56ndkhNn9whttp://www.youtube.com/channel/UCbkz3W7TR2qf91Y_Sa7M8fAhttp://www.youtube.com/channel/UCbkz3W7TR2qf91Y_Sa7M8fAhttp://www.youtube.com/watch?v=hKiOQXfzdzIhttp://www.youtube.com/watch?v=hKiOQXfzdzIhttp://www.youtube.com/watch?v=hKiOQXfzdzIhttp://www.youtube.com/channel/UCbkz3W7TR2qf91Y_Sa7M8fAhttp://www.youtube.com/watch?v=C56ndkhNn9whttp://www.youtube.com/watch?v=9zKpOP78DXMhttp://www.youtube.com/watch?v=E1O4frOtTO4http://www.youtube.com/watch?v=OCMOxKLCwrMhttp://www.youtube.com/watch?v=1TDzdOfm8TUhttp://www.youtube.com/watch?v=lMcIcV8AAW4http://www.youtube.com/watch?v=u-AzZV-Ooykhttp://en.wikipedia.org/wiki/Signal_generatorhttp://uenics.evansville.edu/~amr63/equipment/scope/oscilloscope.html


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http://www.youtube.com/watch?v=RZSM36kqEoo

http://www.youtube.com/watch?v=WMLuvhPTbAE

http://www.youtube.com/watch?v=vkEg7P3oPvs
http://www.youtube.com/watch?v=RZSM36kqEoohttp://www.youtube.com/watch?v=RZSM36kqEoohttp://www.youtube.com/watch?v=WMLuvhPTbAEhttp://www.youtube.com/watch?v=WMLuvhPTbAEhttp://www.youtube.com/watch?v=vkEg7P3oPvshttp://www.youtube.com/watch?v=vkEg7P3oPvshttp://www.youtube.com/watch?v=vkEg7P3oPvshttp://www.youtube.com/watch?v=WMLuvhPTbAEhttp://www.youtube.com/watch?v=RZSM36kqEoo

Oscilloscope and Signal Generator in Labview

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