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2.8 accessing oscilloscope data on the pc

To facilitate saving files to the hard drive of the lab computers, each of the oscilloscopes has a networkinterface card installed.

  • Open Internet Explorer.
  • Under Favorites, click the link titled o-scope. This should bring up a window that has a screen shot of the LCD display of theoscilloscope.
  • Click on the tab labeled DATA.
  • In this window, data from the input, math and reference channels can be saved to the computer.
  • For example, using the options under Waveform transfer from the instrument, choose the Source as CH1, and the Format asSPREADSHEET.
  • Click Get. A dialog box opens for the data to be saved.
  • Make sure to add the correct file extension when saving the data. (.xls for Excel.)

Part 3: data acquisition

For some applications, it is not practical to use an oscilloscope to analyze a signal.

  • Some applications generate signals that operate on timescales of hours or weeks.
  • Some signals require statistical analysis
  • Some data are processed by complicated algorithms.
  • Some signals are used to control electromechanical systems.

For any of these applications, you would need a data acquisition (DAQ) system that measures a signal and thenwrites the data to a file for later analysis, or communicates with another system for real-time use.

In the next section of this lab, you will connect your signal (the function generator) to your signalconditioning equipment (the National Instruments SCXI) and data acquisition equipment (the PCI data acquisition card). You will useLabVIEW, a graphical programming language, to generate a simple Virtual Instrument (VI) to acquire data, chart the data on yourmonitor, and write the data to a file.

3.1 introduction to data acquisition hardware

The SCXI is used to condition a signal. The SCXIs in this lab are equipped with modules that prepare the inputsignal by:

  • Applying a gain (magnification) to the input signal
  • Filtering out high frequency characteristics
  • Balancing a strain bridge

Once the signals are conditioned, they are multiplexed into a single signal. This signal is then passed by aserial cable to the data acquisition card in the PCI slot of the PC. The data acquisition card uses an analog to digital converter(ADC) to record the magnitude of an analog signal as a digitalvalue. As a digital value, these data can be interpreted by a computer.

3.2 configuring hardware and opening a new program

Connect the function generator output to the BNC connector on Channel 0 (the first input) of the SCXI-1520module on the SCXI chassis.

1. Use the function generator to produce a 200 Hz sinusoidal wave.

2. Open LabVIEW 8.0.

3. Click Blank VI. Your new VI will open with two windows: the Front Panel (the user interface) and the BlockDiagram (which is where you develop your graphical code). These two windows are linked, and as you develop your VI, you will see thatsome objects that you place in one of the windows will appear simultaneously in the other window.

4. On either the front panel or the block diagram, click File>>Save As. Save your VI to the folder (on the desktop) that corresponds to your lab section. (Saving eitherwindow will save the content from both the front panel and block diagram windows.)

Questions & Answers

Application of nanotechnology in medicine
what is variations in raman spectra for nanomaterials
Jyoti Reply
I only see partial conversation and what's the question here!
Crow Reply
what about nanotechnology for water purification
RAW Reply
please someone correct me if I'm wrong but I think one can use nanoparticles, specially silver nanoparticles for water treatment.
Damian
yes that's correct
Professor
I think
Professor
what is the stm
Brian Reply
is there industrial application of fullrenes. What is the method to prepare fullrene on large scale.?
Rafiq
industrial application...? mmm I think on the medical side as drug carrier, but you should go deeper on your research, I may be wrong
Damian
How we are making nano material?
LITNING Reply
what is a peer
LITNING Reply
What is meant by 'nano scale'?
LITNING Reply
What is STMs full form?
LITNING
scanning tunneling microscope
Sahil
how nano science is used for hydrophobicity
Santosh
Do u think that Graphene and Fullrene fiber can be used to make Air Plane body structure the lightest and strongest. Rafiq
Rafiq
what is differents between GO and RGO?
Mahi
what is simplest way to understand the applications of nano robots used to detect the cancer affected cell of human body.? How this robot is carried to required site of body cell.? what will be the carrier material and how can be detected that correct delivery of drug is done Rafiq
Rafiq
if virus is killing to make ARTIFICIAL DNA OF GRAPHENE FOR KILLED THE VIRUS .THIS IS OUR ASSUMPTION
Anam
analytical skills graphene is prepared to kill any type viruses .
Anam
what is Nano technology ?
Bob Reply
write examples of Nano molecule?
Bob
The nanotechnology is as new science, to scale nanometric
brayan
nanotechnology is the study, desing, synthesis, manipulation and application of materials and functional systems through control of matter at nanoscale
Damian
Is there any normative that regulates the use of silver nanoparticles?
Damian Reply
what king of growth are you checking .?
Renato
What fields keep nano created devices from performing or assimulating ? Magnetic fields ? Are do they assimilate ?
Stoney Reply
why we need to study biomolecules, molecular biology in nanotechnology?
Adin Reply
?
Kyle
yes I'm doing my masters in nanotechnology, we are being studying all these domains as well..
Adin
why?
Adin
what school?
Kyle
biomolecules are e building blocks of every organics and inorganic materials.
Joe
anyone know any internet site where one can find nanotechnology papers?
Damian Reply
research.net
kanaga
sciencedirect big data base
Ernesto
Introduction about quantum dots in nanotechnology
Praveena Reply
hi
Loga
what does nano mean?
Anassong Reply
nano basically means 10^(-9). nanometer is a unit to measure length.
Bharti
how did you get the value of 2000N.What calculations are needed to arrive at it
Smarajit Reply
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Source:  OpenStax, Introduction to mechanical measurements. OpenStax CNX. Oct 18, 2006 Download for free at http://cnx.org/content/col10385/1.1
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