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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

Is there any normative that regulates the use of silver nanoparticles?
Damian Reply
what king of growth are you checking .?
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
yes I'm doing my masters in nanotechnology, we are being studying all these domains as well..
what school?
biomolecules are e building blocks of every organics and inorganic materials.
anyone know any internet site where one can find nanotechnology papers?
Damian Reply
sciencedirect big data base
Introduction about quantum dots in nanotechnology
Praveena Reply
what does nano mean?
Anassong Reply
nano basically means 10^(-9). nanometer is a unit to measure length.
do you think it's worthwhile in the long term to study the effects and possibilities of nanotechnology on viral treatment?
Damian Reply
absolutely yes
how to know photocatalytic properties of tio2 nanoparticles...what to do now
Akash Reply
it is a goid question and i want to know the answer as well
characteristics of micro business
for teaching engĺish at school how nano technology help us
Do somebody tell me a best nano engineering book for beginners?
s. Reply
there is no specific books for beginners but there is book called principle of nanotechnology
what is fullerene does it is used to make bukky balls
Devang Reply
are you nano engineer ?
fullerene is a bucky ball aka Carbon 60 molecule. It was name by the architect Fuller. He design the geodesic dome. it resembles a soccer ball.
what is the actual application of fullerenes nowadays?
That is a great question Damian. best way to answer that question is to Google it. there are hundreds of applications for buck minister fullerenes, from medical to aerospace. you can also find plenty of research papers that will give you great detail on the potential applications of fullerenes.
what is the Synthesis, properties,and applications of carbon nano chemistry
Abhijith Reply
Mostly, they use nano carbon for electronics and for materials to be strengthened.
is Bucky paper clear?
carbon nanotubes has various application in fuel cells membrane, current research on cancer drug,and in electronics MEMS and NEMS etc
so some one know about replacing silicon atom with phosphorous in semiconductors device?
s. Reply
Yeah, it is a pain to say the least. You basically have to heat the substarte up to around 1000 degrees celcius then pass phosphene gas over top of it, which is explosive and toxic by the way, under very low pressure.
Do you know which machine is used to that process?
how to fabricate graphene ink ?
for screen printed electrodes ?
What is lattice structure?
s. Reply
of graphene you mean?
or in general
in general
Graphene has a hexagonal structure
On having this app for quite a bit time, Haven't realised there's a chat room in it.
what is biological synthesis of nanoparticles
Sanket Reply
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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