Extract information from your unique - how the equation works?

Hello

y at - it a detailed explanation or step by step on how works the equation used by your single extract?

The equation is:

I want to know or understand how frequency, amplitude and phase are established. Also, what is x (n)?

Thank you.

In this equation, x (n) represents the series of samples of the sinusoidal input signal. Samples are taken at intervals spacing 1/Fs seconds apart. Then, n/f means the the nth sample in the series.

Internally, the VI takes a FFT of the time domain signal. It then uses a process of interpolation to find the frequency, amplitude and the phase of the input signal. Intermpolation is used because the highest point of the output of the FFT may not exactly be on the frequency of the signal.  This is caused by the frequency of the signal and the frequency of sampling in general not be exactly harmonically related.  I think that it corresponds to a polynomial of the second order (quadratic) to the top of the FFT output and determines the outputs of the values of the polynomial.

Lynn

Tags: NI Software

Similar Questions

  • Extract information from your unique, Phase algorithm/formula

    I use the Subvi extracted a single signal to make calculations of phase of a research project. Phase measures appear to be quite accurate. For my report, I need to be able to specify how phase measures are calculated. Is there a relatively compact way to indicate the formula that LabVIEW uses to perform these measurements?

    Read the detailed help file will give you a formula.  If you want more details, open the block diagram and it performs an FFT of the input data and then uses a peak finding algorithm to interpolate the exact frequency of the three dominant bins.

    Lynn

  • How to extract information from the ovf file from a file of eggs by programming?

    How to extract information from the ovf file from a file of eggs by programming?

    Hello

    Please provide details:

    -On what OS you are programming (Linux, Windows,...)?

    -What programming or scripting language do you use?

    An EGG file is just a tarball of hard, .ovf and .mf files. The .ovf file is always the first. For example, on a Unix like operating system, this should be easy.

    For Windows, there are several options available to manage programmatically the tarballs. See for example http://www.codeproject.com/Articles/470999/tarlib-Windows-TAR-Library.

    And the ovf itself file is in XML format. For handling XML files are libraries available for literally every OS and programming language.

    Google is your friend.

    Andreas

  • How to extract information from tree logical structure using the PDF Library?

    How to extract information from tree logical structure using the PDF Library?

    Adobe's PDF Library has PDSEdit APIs to extract information of the logical structure of a tagged PDF file.

    But I couldn't find any example code to demonstrate the C API on PDSEdit layer.

    I google search using different keywords, find none.

    I contact datalogics (which gives me the evaluation of adobe PDF library copy), no code sample on APIs PDSEdit yet.

    Everyone knows any code example can demonstrate extract structure logic tree information PDSEdit APIs (in C/C++ or Java)

    from a tagged PDF file? And is there any sample to demonstrate that connects a tagged logical tree contained in the content stream?

    I thank very you much in advance!

    logicaltree

    Did you look at the code snippets in the SDK?  There are a bunch of samples to work with PDSEdit and structure/marking.

  • I want to extract information from the same input field in multipal PDFs (created using document pro) and export them to an excel file. Is this possible? If this isn't the case, Adobe seeks to make this project a reality.

    I want to extract information from the same input field in multipal PDFs (created using document pro) and export them to an excel file. Is this possible? If this isn't the case, Adobe seeks to make this project a reality.

    -Extract all data from a single file can be done via the tools - forms - more form Options - export data...

    -Extract some data from a single file will require a script to measure.

    -Extract all the data from multiple fields in a single file can be done via the tools - forms - more form Options - merge data files into spreadsheet...

    -Extraction of data from several files will require a script Custom Action, as I've written before.

  • Extract information from the arrayCollection collection

    Hello world

    I have a very simple problem, but I'm a new flex developer and I have no idea what to do.

    that I extracted information from a database by using a Web service in coldfusion.

    in flex, I recovered my query result in an arrayCollection collection

    private var tabInfosDriver:ArrayCollection

    Private function driverInfoHandler(event:ResultEvent):Sub

    tabInfosDriver = event.result as ArrayCollection; collection

    and if I give {tabInfosDriver} as a dataprovider to a DataGrid, the result of the query is displayed correctly, something like that.

    Header1 By tete2 Header3 Header4 Header5
    someValuevalue2someValue3someValue4someValue5


    now, I want to use header1 someValue to fill a textField instance.

    I tried:

    Label1.text = tabInfosDriver.getItemAt (1.0) m:System.NET.SocketAddress.ToString)

    but it wrong: the index table out of range and in any case, I want to use the name of the header field, which is the database table to call its value

    Label1.text = tabInfosDriver.getItemAt("header1").value.toString)

    What can I do? I don't know that it is easy to solve. I looked at all the methods of the collection arrayCollection object, but I can't understand wich one to use.

    Please forgive me of my language, I do not speak English very often.

    Dominic

    Often you can either return the data to the Flex application in standard object notation, or to reconfigure the data in this way once he returns to the Flex application in the result handler. The standard notation, to which I am referring is:

    {

    {key1: 'value 1', key2: "Value2", key3: "Value3"},

    {key1: 'value 1', key2: "Value2", key3: "Value3"},

    {key1: 'value 1', key2: "Value2", key3: "Value3"},

    {key1: 'value 1', key2: "Value2", key3: "Value3"}

    }

    So in this way the data is structured, already as an associative array, because such a table is really just an ActionScript object.

    If these data should be accessible in two ways:

    var tempVar:String = myObject.key1;

    var tempVar:String = myObject ["key1"];    (maybe myObject ["key1"])

    Moreover, this "standard object notation" is also known under the name of JSON and there are libraries for handling JSON to the format of the data in Flex, PHP, etc if you have not necessarily to treat it as JSON, which comes, which makes it a little more formal and provides additional APIs:

    http://code.Google.com/p/AS3corelib/

  • Extract information from signature in VBA to a PDF file

    Hi all

    I need to extract information from signatures of PDF files in VBA (mainly the name of the signer and the date of signature. PDF files have several signatures inside them).

    So I have a few questions:

    -Are there an example somewhere to do such a thing?

    -I need Acrobat Pro for this? This is an important point because the code is supposed to be run on machines where ONLY Acrobat Reader is installed.

    -If the above is not possible, do you know a command line utility that would do the thing (and I could run from my VB code)

    Thank you for your help

    Emphyrio

    As already mentioned, you will need Adobe Acrobat Standard or Pro VB/JS bridge. If you want to make this work with just the free reader, you are limited to what you can do in JavaScript environment. Basically, this means that you must open the file in the player and then for example use a menu item to trigger functions to get information about signatures in your file. For example, this information may appear on a dialog box, and you would be able to copy & paste from this dialog (which means no VBA integration at all).

    Of course, you can use either Adobe PDF Library (licensed through Datalogics), or other 3rd party PDF frameworks/libraries. It's a site run by Adobe, you will understand that we cannot give you advice regarding 3rd party solutions that compete with the own Adobe solution.

  • If my phone was stolen while it was unlocked, would get a remote delete all information from my phone so the assailant was actively digging through my phone?

    If my phone was stolen while it was unlocked, would get a remote delete all information from my phone so the assailant was actively digging through my phone? I'm afraid that the author would look through all my personal stuff that I have on it.

    You can clear your phone remotely while it is unlocked.  Everything will be removed.

  • trying to export information from my phone to the pc, but it's prob givin

    OK nono help for export of blackberr info to pc

    Hello

    ·         What exactly happens when you try to export the phone info?

    ·         You get the error message?

    ·         You use any application when you export information from your phone?

    ·         What info are you trying to transfer from the phone to the computer?

    ·         Have you installed the BlackBerry Desktop Software?

    If you are trying to transfer pictures from phone to computer, you can check the link below:

    Import photos from your BlackBerry to your PC

    http://my.BlackBerry.com/tips/8172

    Also I suggest you to contact the Blackberry Support for assistance.

    http://us.BlackBerry.com/support/

  • Extract information from a form of Muse

    I'm looking for a way to extract information from a muse of. The form is a type of query. ID like to be able to take emails all receipts and pull so that the names, email, zip code things like that and put it in a file pdf or something similar if it is a list of all that info. is there an option in adobe or a third party app that I could use?

    Not with the basic form. You need one of the plans Business Catalyst paid extra and advanced forms to process the data. In either case, it will be probably be much simpler and more profitable (as in totally free) to register directly for Surveymonkey, Polldaddy or ultimately OpenPetition.org. No point to try to reinvent the wheel.

    Mylenium

  • Is there any task under the WSF to extract data from configuration of an instance as working Structures?

    Hello

    Is there any task in the Installation Manager to extract data from configuration of an instance as working Structures, research etc.

    I'm looking for the same kind that I could move all these configurations of one example to the other.

    Thank you

    Maury

    The name of the task is to manage Configuration packages in the installation and maintenance program. You can see this document http://docs.oracle.com/cd/E48434_01/fusionapps.1118/e49542/F1166430AN11D30.htm

  • Frequency measurement and phase of a square wave using to extract the information of your unique vi

    Hi all

    I'm trying to measure the frequency and phase of a square wave from a data acquisition card using vi retrieves your unique information. So far, the frequency can be measured precisely, but there are a few problems with the measurement of phase.

    I have attached a sample program here. I generate the wave square using Square Wave PtByPt vi. The default sample size is 1000. When I put the frequency = 7.43, phase = 80, the frequency can be measured precisely, but the phase is completely. Is there something wrong with my program?

    Thank you very much for your help.

    Best regards

    A square wave is not a single signal ;-)

    If you have a square wave use the edges to make measurements.

  • How do you download a picture from your phone to the pc

    I don't know how to download pictures from my phone to my pc... Help?   need to put a picture of some website profile and options have been browse files or photos the name of download file?


    I don't know how to download pictures from my phone to my pc... Help?   need to put a picture of some website profile and options have been browse files or photos the name of download file?

    Italic & "BOLD"?
     
    How you get photos from your phone to your Windows PC (assuming that there - you ask in a Microsoft forum, well you have posted in the ' Other/unknown' group) is at least partially determined by the phone in question.
     
    In general you connect the phone to your Windows PC if your phone is seen as an external drive and then look for the phone as an external drive from your Windows PC to get a photo - copy on your local computer.  You could send it from your phone to your email address and then check that the e-mail on the Windows PC.  You can send it via Bluetooth if your phone and your Windows PC have this ability so everything is configured properly.  Etc.

  • How to extract data from SQL server in the FDM

    Hi Experts

    How to extract data from a SQL server HFM to another SQL Server using scripts for integration in FDQM?

    concerning

    Dev

    Could you clarify why you want to do this?

    If you try to synchronize two databases (apps) to have a backup or something running in a development environment, I suggest configuring replication between two databases. It would be much more effective to do it at the SQL Server level through the application of FDM, IMHO.

    Charles

  • Information from two databases in the same query

    How can I get information from the "of" in addition to a db in a cfquery? for example, say in a db I have their name and in another PB I have their last name..., for example are my DB something like this: name FirstDB db and db I memberNumber, the first name and the name of the comic is SecondDB and in this PB I memberNumber, lastName.
    How can I run a query to collect the name of FirstDB and the name of SecondDB by the memberNumber?

    FirstDB:
    memberNumber 1
    First name Tom
    memberNumber 2
    firstName Patty

    SecondDB:
    memberNumber 1
    lastName Smith
    memberNumber 2
    lastName Dell

    then when I exit the query I could get Tom Smith and Patty Dell

    Thanks in advance for the help...


    SELECT count (*) 2 albums like County, name, city<---city is="" in="" the="" town="">
    Cities of people
    WHERE type = 1
    GROUP BY name

    There are several syntax errors in this example, but I assume that
    It is any example of code written in the message not copied no actual
    running the code. Knowing which becomes a SQL error help know
    where the problem may lie in the actual code.

    You may need to fully qualify your fields in the select clause for that
    the DBMS knows which database table, you want the field to come.

    SELECT page 2 of count (*) County, people.name, towns.city
    People, cities
    WHERE type = 1
    GROUP BY name, city

    OR with aliases:

    SELECT top 2 count (*) AS COUNT, p.name, t.city
    PEOPLE p, t of cities
    WHERE type = 1
    GROUP BY name, city

    You add all the new fields to your GROUP BY clause, correct? He
    It requires that all fields that are not used in aggregate function [such as
    Count()] be included in the GROUP BY clause.

Maybe you are looking for

  • Loading does not work on the Satellite L10-204

    Hello everyone, I have a big problem, my computer to charge. When the charger is connected once it charges my computer and the other that it doesn't.It changes each 2 sek. and drive me crazy because I can't use my computer effectively - cursor stops

  • Siri home remote button not working anymore

    Hello have a problem with the remote Siri yesterday. Unfortunately, the Home button no longer on inputs. Can support long is no longer going to sleep. Go as the application changes to home viewing window is no longer. All other keys are working. When

  • Serial port empty read buffer

    Hello everyone. I'm currently programming a vi that takes an input of a device in series string and parses this string. The only question that I have is that (probably) between readings, when the buffer is empty, the vi will be parse this buffer empt

  • 4 stacked 3548P - all ports inactive and web console gui is unresponsive

    Hi, I was contacted by a company that had lost their entire skillset when an employee leaves, and powerconnects are not my strong point. They stacked 3548 4 p - console ports are inactive and web gui is unresponsive. We do a config, and I don't under

  • Connection to the banking Web sites

    For some reason some a few days ago I stopped being able to connect to the Bank Web sites. It doesn't matter which browser I use I either get the message Web page is not available or the page has been reset. So far, no one knows how to solve this pro