Distribute the data output waveform of niScope Multi Fetch Cluster

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• Discordance between the DAQ rate Wizard and the dt output waveform

  I use a NI 9239 to acquire analog input data. Using the DAQ Assistant, I put the N samples, 8 k samples read acquisition mode and the frequency of acquisition of 8 k. I wire the data output of the DAQ Assistant directly to an indicator of waveform.

  I expect the dt for the waveform to be 0.000125. I have 0.000120, which is a rate of acquisition of 8333,333 Hz.

  What I am doing wrong?

  Thank you.

  To read the 9239 specifications in order to answer your question. Focus on page 18/19.

  Bonus tip:

  You specify the MINIMUM for acquiring sampling frequency in the DAQ Assistant.

  hope this helps,

  Norbert

• storage of the data output of while loop

  Hello

  I have a data acquisition system set up to read the couple of a transducer. The output needs to be fed with an excel document, once the program stops running, or when a key is pressed.

  with the current code attached, the excel document is created, but it only shows the most recent series of data. How to make the table to store all the data coming from while loop?

  Ive only been programming with labview for two weeks, so chances are that it is something simple, but please help us in any case.

  JM

  To get what you expect, the Terminal output of table a while loop right click and select the option activate Indexing. Usually if you want to save data use queue to pass data inside the while loop to another loop/VI and perform data recording. For all that you have examples, please do a searc in LabVIEW help > find examples.

• With an average of the data output.

  Hello

  I am a new user of Labview. I need to write a labview program that will average my output in a single data data.

  Basically I have an XY graph which results in a table and the idea is to average the data points.

  This is the kind of program that I use.

  Thank you

  Mutah

  Hi Nicole,.

  You can index the table and use the average function (within the mathematics - probability and statistics). Then, you will get the average value of each table. If you want to see the averages in a table, then you can combine average values in a table again...

  Hope this help out you

• Distribute the data in a column and update new column with data of split

  Hi all
  
  I'm working on Oracle 10 g. One of my table of the column stores the data, sampled below.
  
  1722999340KK000200000
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  See you soon,.
  
  novice

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• abservation input until the data output data

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  media, film or photo
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  Hey k1.technology,

  Looks like you are trying to understand the technical processes behind the programs. Microsoft Communities is a consumer focused forum where we focus on consumer-level issues. The type of information you are looking for is very technical and not something that is easily explained in a single post or thread.
  If you want to understand how function calls or how you can write your own, I highly recommend to contact your local community college and used to sign up for a computer class. You can also check Microsoft's Channel 9 for a lot of fantastic about the applications of understanding and their operation:
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• Distribute the data file with the cod file?

  Hi all

  My application runs from a file of database on camera flash memory.  While the application can transfer data from my server to complete the database, the first download is quite large and takes a long time to run (I'm working on it).

  It occurred to me that an alternative might be to provide a database of pre-populated with the app file, while the app will run straight out of the box without needing to first synchronization.

  Does anyone know if the App World store supports this - distribution of data, and the app?

  Thank you very much...

  You're right about the wasted space.  How about you always include a resource file, but make sure that if your program needs to read data from "base", read from the resource file, and if it's new data, read from the DB.  I don't know what your app does so I don't know if it's feasible or not, but if this is the case, that would solve your problem.  What do you think?

  

• How can I get the data view to display the same amount of time I save?

  I use the Sound and Vibration Measurement Suite.  In the data view, I display a graph of time, the power spectrum, the Color Map and the waterfall.  I am also showing strength in numbers group for several bands and doing cutting-edge research.  I record 100 ms of the transient wave.  In the data view, why the temporal plots show several seconds of data?  What determines how much time will appear in the data view?  More important, the power spectrum reflects the power for the entire of several seconds of data displayed?  Same question for power in the values of band and cutting-edge research.  I want to just this data displayed for 100 ms of the wave that I record.  So, how can I get the data displayed (waveforms) and power numbers come only 100 ms of the recorded wave?

  Finally, what is the best way to make account concisely the recorded data?  By slide numbers on the Documentation tab is not concise, because it comes with graphics, etc..  I tried save as ASCII/LVM, but I get a bunch of stuff intermiated I don't care.  Help?

  Hi TimRsandiego,

  SignalExpress is programmed to display graphs with default scales based on the type of action, it's reading. These scales and settings can be changed by right-clicking on the graph, and then select Properties.

  If you are interested to learn more about how to use SignalExpress, I would recommend checking out some demonstrations/tutorials on NI.com. You can find some of these demos at the following location:

  Let me know if you have any other questions.

  Kind regards

• When not data type of the variant of wire to the data?

  
  

  When the data type of the sink of the thread (its destination) database is well defined, LabVIEW makes a type definition back from the variant to the data output. It does not work on polymorphic functions and structures border entries, etc. It is usually harmless to leave the type continuous wire in most of the cases but do not forget that you let LabVIEW decide for you, how to convert the data.

  In addition, if you put the following line in your file labview.ini:
  
  coerceFromVariant = TRUE

  you will be able connect variant directly to the sink, without variation in data (and its error handling).

• What is the minimum value for the data type double?

  ... a more academic question: what is the minimum value of the data type double? I thought 'double', it is the 8-byte IEEE standard and what I remember, it's + - 1.7E + - 308.  The more different number of 0 should be 1.797E - 308.

  This is why I was a little surprised when I looked at the data output of my calculation of CVI, where I found the numbers with exponents of E-319 or E-324 as the smallest value...

  But I'm sure there's an explanation :-)

  Thank you for sharing with me,

  Wolfgang

  The largest number is indeed the order of + 1.7E + 308; There are a smaller number of - 1.7E + 308. Note that this is in fact the most negative number, which is the smallest by some reckoning. For the small beach of the Exhibitor, things get a little more complicated. 1E-308 can be represented with complete accuracy and resolution, but if you're willing to lose a few bits of precision, you can go down even further. For example:

  Double x, y, z:

  x = 1E-300;

  y = 1E7;

  z = x / y;               Give 1.000000000000000E - 307

  y = 1E8;

  z = x / y;               Give 9.999999999999999E - 309

  y = 1E18;

  z = x / y;               Give 9.999987484955998E - 319

  y = 1E23;

  z = x / y;               Give 9.881312916824931E - 324

  So, as you can see, values less than 1E-308 are possible, but they become increasingly more inaccurate and should not be relied upon.

  JR

• Data for the graph economy waveform

  Hello

  I'm trying to collect the data of temperature with the attached VI. Everything works fine until I open the exported file that contains only the last point of the chart. I already had this problem and I think that it is quite common, but I can't find how to solve it.

  Thank you very much for your help!

  Here's what you do.  The central loop is where you get several waveforms.  You want to write each waveform in the output file, which means you want the wave form to write to the worksheet in the Central loop.  Look at its inputs and outputs - put three of them, the file Path/New path, add to the file? and the header? on the shift registers.  Initialize (wants to say wire the register shift outside the While loop) the path of the file to "data\test" (as you've already done), with the new path towards the "output" Shift Register Terminal.  False (the default) of thread to add to the file? and true (if you want headers) to headers?  On the side of the "output" of these two SHIFT registers, wire to 'Add to the file?' "True" and "False" to "Headers?

  For the first time you run the intermediate loop, the file will be opened in a new file (since add to the file? is false) and a possibly written header.  All subsequent calls will add data in the same file (because you wired "True" to add to the file on the output terminal) and no header.

  And to get rid of the unnecessary frame at the end – data flow will be responsible for sequencing.

  Bob Schor

• dispplaying data on the graph of waveform inside/outside while loop

  I create a vi using the random number generator, entering the number in the function(express>>arithmateic>>maths>>trig>>sine) fishing and connect the output of the function sine waveforms. Table of waveform show no problem. If I replace the with graphic waveform table, I get an error that the source type is differenct type of sink. I then put waveform chart outside loop everything hoping that tunnel would act as a table, but still I get the same error. I then put build table palette between all border and loop waveform graph which is placed outside the while loop. I get no error, but no data is displayed on the graph of a waveform. Theoretically, if I press stop I would see a distorted sine wave on the waveform graph, but this doesn't seem to be the case. I am wondering how to view data on the graph of a waveform in such cases!

  Thank you in advance for reading and help!

  See you soon

  First of all, you can take a part of the basis of LabVIEW tutorials.

  Since you need to work with a chart and it is the preferred method to display data point by point, I don't know why you try to use a chart. In any case, you cannot use all simply a table of generation because that would be just the result of the last iteration and your graph indicates it is a single point. If you activate autoindexing, then you get all the values, but not before the end of the loop. If you were to use a shift register and the build dashboard, you might place the graphic inside the loop, but then you would face performance issues that the table would grow uncontrollably.

• Generate the analog waveform based on the data file

  I want to create an analog voltage output that follows I have a data file (excel, csv, text (which is easy)).  The data file creates a waveform with equal time between steps (dT =.0034 sec).  After the output through all the data points, I want it repeat indefinitely.

  What is the best way to create the waveform of a data file?

  To create a type of waveform data, calculate the dt by subtracting two values in column 1 and get the array of Y from column 2. If you save the file as a comma separated or tab text file, you can then use the spreadsheet file read. After obtaining a 2D array, you would use the index table and the subset of table functions.

  Assuming you use a capture card data OR for the output signal, you can pass a type of waveform data to a writing DAQmx and set for the generation of types.

• How to get the creation Date of the site recorded for the footer output (printing to PDF)?

  If you go to Page Setup in Firefox, the option for the footer is the date and/or time of output. I don't want today's date that its print, but would rather than the Date of the creation of this web session saved as it is important to display this information with a legal matter. The research that has been done on a computer is out of date of creation down instead. I know that I could add the date by using the custom field for a footer in the Page options but prefer automated sound somehow when you print to a PDF (CutePDF). Please let me know.

  Thank you

  You might be able to automate this process if you open your PDFs with Adobe Acrobat Pro and make sure that the PDF file has a date of receipt:
  Idea of *http://smallbusiness.chron.com/print-date-time-stamps-pdf-55986.htm...