FPGA acquires only the positive part of the signal

Hi all

I have the NI USB-7855R and using the personality of DAQ balanced example of e/s (http://www.ni.com/example/5961/en/). I plugged my generator Agilent to AI0 (in mode CSR) and I have the following problems:

(1) waveform graph in LabVIEW is only to show the positive part of the sine wave that I am providing to the Board of Directors (clipping at 0 V). Only by compensating the signal from the signal generator, I am able to get the two cycles.

(2) while I am out 5 Vpp on the generator of signals on the graph of a waveform in LabVIEW I see only 1.5 mVp.

Any suggestions on what could be the problem?

Thanks in advance or your help!

The first graph of "analog input" in your link shows the analog inputs are converted to unsigned integers (U32) before their passage in the FPGA-> host FIFO. Negative values will obviously be lost make this conversion.

Tags: NI Software

Similar Questions

  • Determine the position of a part of the signal on a graph

    Hi all

    I have a problem. I determine the position of a part of the signal on a chart. So, I have to determine the maximum value of the part (this is not a problem).

    Signal a lot of noise. I did some filtration but still signal have noise. Concerning this, filter change signal, two later when I take one measure, there is a possibility that this is not true.

    Anyone has idea how to determine the position of a part of a signal automatically, for the various signals (similar).

    There are photos attached where is what belongs to an interest in a signal. There is a VI where is an a test signal.

    Thank you

    Hello

    From the screenshot, I understand that you only interested in the local maximum of the signal.

    There is a VI that detects peaks when you specify a certaing point and this point maximum width.

    Later, it's just a matter of setting the value of local maximum of you. Basically, you'll have to point once again got 1 d table than VI.

    I enclose a VI that can be a good starting point for your application.

    Best regards

    Ion R.

  • Writing only to certain parts of the cluster in an array by reference

    Hello

    I have an array of clusters that I use as well to view and enter data, i.e. elements of the cluster are unmodifiable (disabled) controls used as indicators of "false" (numeric values, strings, LEDs) and some are normal witnesses (numerical values, buttons).

    The "indicator" part of this cluster table must be constantly updated (for example with the positions of the engines), normally by replacing the elements according to cluster in a loop and writing in the table. This can lead to conditions of race with the part 'control': If the user enters data in a 'bad' timing control, it gets immediately replaced by the old value - in this case the update process began just before the user input and completed just after the entrance of (which may be a simple click is enough) , so the old values of controls are rewritten on user controls, as the table should be rewritten as a whole.

    Now, I'm looking for a solution to this critical race condition without changing this 'mixed' approach of control/indicator (e.g. by control and indicator tables separated next to each other and paired scrolling or so - which would make it much more horrible GUI design, among other disadvantages). I know that it is possible to change the value of an element in the cluster without having to rewrite the entire cluster using the element reference. However, it's more complicated if you have an array of clusters, because you want the cluster to a certain index table and to my knowledge, there is no such property that gives you for example the reference to the item table located in an index of certain (who is a lack of long date in the table of Labview manipulation). If you change the 'value' of an element of the cluster property in a table, it seems to affect the 'last active' element of the array, at least it is correlated with the array element that was clicked on last. Maybe there's a way somehow programmatically set that ' last active ' array element and browse the table in this way (setting the flag "correspondent" elements of the cluster by reference) or maybe someone knows a solution 'Nice' and elegant?

    I hope you understand what I mean

    Thanks in advance!

    To avoid such conditions of race, make sure what you write on the Board in the same place change you and write only the data for the indicators. Practically, this means that if you have an event for the control change value, you must have another case of event in the same structure of update of the indicators (timeout or a user event) and make sure that the indicator event takes the rest of the data of the current value (for example through a terminal or a local variable or the DVR suggested Steve). Similarly, you can use the terminal control to the current value of the control for the indicators rather than depend on the event containing the correct value.

  • How can I print only the part selected a page?

    When I highlite prints part of the entire page. How can I print only the part selected page?

    Try:

    Highlite your text

    Press CTRL + P to start the print menu

    "All" is selected by default in the scope . Change it by selecting 'selection ', and then click OK.

    This example shows only the text that is selected. Microsoft® Security MVP, 2004-2009

  • I am trying to load a MPEG file into windows Movie Maker 2013 and load only the audio part. What can be done to fix this

    I have MPEG files that I'm editing and when I load in Movie Maker only the audio part load. During loading, I get the following message at the bottom of the screen for the audio to load but when that ends more nother is responsible and the screens indicate only the audio track.

    Hello friend. I know that windows movie maker supports wmv video well, you can convert your videos to wmv mpeg video for a trial, it should work. If you don't know how to convert a video, this video converter will help you a lot.

  • Photo Gallery/Windows Vista to scan an image on my Canon printer/scanner and it produces only a small part of the original.

    original title: Trouble scanning an image.

    I use Vista/Windows Photo Gallery to scan a picture on my Canon printer/scanner and it produces only a small part of the original. What should I do to make it load to 100% of the original?

    Sometimes, there is not enough contrast of a photo
    and a scanner may have problems with the edge detection.

    On the preview screen, you should be able to see the
    part of the picture will be scanned.

    This article may be useful:

    Windows Vista - Windows Photo Gallery - scan a picture
    http://Windows.Microsoft.com/en-us/Windows-Vista/scan-a-picture

  • How to make a text field to accept a capital letter has or a number in the position of the first character and only the numbers after that?

    Hi all

    We have a text field in one of our screen in our mobile app. Currently the user can enter alpha numeric characters in this text field.

    It is now that this field should accept a capital letter A or a number in the position of the first character and only the numbers after that.

    Could someone let us know how to do this?

    Thank you.

    Or, how about the substitution of this abstract method in textFilter?

    public boolean validate(character char,
                            AbstractString text
    int position)

  • Can I save the position of the head, then save only the movement of the student without crushing the movement of the head?

    Hello world. I get the concept of the takes, but I can't work out how to save the position of the head of characters and then in another concentrated on the position of the students, then to another socket just eyebrows and so on. If I try to do now he simply wrote on the previous setting. Different things have a record arm but changing just the value of the resistance. So is it possible to do or position the head, eyebrows, mouth students must be registered at the same time? Thank you

    Here's a way to try (worked for me)

    In the Panel of puppets Ch, add behavior of face for each eye and each eyebrow. In the scene, activate the record on only the face, then make a recording. Then the face, activate and deactivate the eyes (or one eye) and record. Then activate only the other eye, or eyebrows, etc.

  • What is the only guarantee of parts not my laptop battery and other parts still on warranty or not?

    What is the only guarantee of parts my battery laptop and other parts still on warranty or not.

    Can you please suggest me.

    First of all, don't be surprised if a forum moderator deletes your image since it includes the service of your system and for some reason number any makes them have a cow.

    Looking for your resume, it said indeed that you are currently under a single warranty parts August 2016.

    An only parts guarantee means technical support Dell accepts a call from you and solve problems with you and if they determine that a spare part is needed they will ship it to you that you install (or have installed by a person at your charge).  The good news is that shipped parts usually come with a confirmation email with a link to the installation instructions.  So there is a good chance that you will be able to install the part of yourself.  In addition, they may or may not require that you return the defective part.  Carefully read the paperwork accompanies the spare part or you subsequently receive an invoice for the replacement part if you need to return the defective part, but did not.

    As stated in the fine print at the bottom of the image you provided, batteries are not necessarily covered by the warranty.  Only batteries guarantees of Dell for the first year.  After that, they are not covered by the warranty of the system.  You're in your third year of warranty for this system, so unless you have purchased a new battery from Dell in the past year, then the battery is out of warranty.

    Extended warranties generally do not make sense (are not a good value) except on expensive systems.  Most of the failures are the cause of some accidents (spillage, unit dropped) and bit of warranty Dell cover "accidental damage".

    The most common repairs for laptops are replacements of flat screens, replacement of hard drive and keyboard replacements.  Each of these parts are well below $75 and are all pretty easy to install by a very practical person.  The more difficult would be a disk replacement because it's hours to reload the OS, updates, drivers, your software and your data... Often, people just buy a new system rather than make the effort to rebuild all the software from a hard drive failure.   Also most credit cards extend the warranty from the factory for an extra year doing a Dell warranty like two a year.

    Hope you will find it is clear and useful for you.

  • I use iphone videos and still images in a project.  When I drag the videos in the timeline, they work fine, but when I drag still images, I have only a small part of the original photo.  No idea how to solve this problem?

    I use iphone videos and still images in a project of first Pro CC.  When I drag the videos in the timeline, they work fine, but when I drag still images, I have only a small part of the original photo.  No idea how to solve this problem?

    Right click on the photo in sequence and "ladder to the chassis '. Can also be set in the preferences and affect imports after the change

    Thank you

    Jeff

  • How to remove hidden links (how to remove the links, ONLY the hidden parts of the document)

    in Acrobat XI-> after deletion "text hidden" using the tool 'Remove hidden information'-> links still remain in the hidden passage / cropped -> so the real question is - HOW TO REMOVE THE LINKS HIDDEN in a PDF. An approach may be to remove 'links, Actions and Javascripts' tool 'Remove' hidden information - BUT it removes links TO the WHOLE OF the DOCUMENT - "how to remove the links, ONLY the hidden parts of the document"

    Hidden text is the collection of glyphs in the PDF page using the text rendering mode 3 (no terms, no fill).

    The links set up in connection with this hidden text are not 'hidden' (this isn't how it works with annotations PDF link - see ISO 32000-1: 2008).

    Any link annotation placed in a PDF file are the same as any other annotation link (with the exception, of course, of whatever Action the link happens to).

    Thus, no special sauce for the links that were placed in conjunction with now deleted "no hidden text.

    In the context of what you wrote, maybe it's you select - Ctrl + click the link annotations of interest and press the delete key.

    Be well...

  • Items purchased and it appears I have got only the part of editing photos and movies. How can I get part 2 of my order?

    Items purchased and it appears I have got only the part of editing photos and movies. How can I get part 2 of my order?

    Please post related queries from Photoshop Elements

    http://forums.Adobe.com/community/photoshop_elements

  • Panel display problem (only the part of the .psd file is displayed) program

    Hello

    In my film, I loaded a series of .psd files in my calendar.  (Apparently, Premiere Pro does not support imports from a Canon 5 d RAW file).

    When I play the timeline, the displayed image in the top right program is only a small part of the actual picture that I photographed.

    When I adjust the drop-down list in the Panel of the program at different sizes ('Fit', 50%, 100%) etc this does not solve the problem, it doesn't seem to change the percentage of the program group that is occupied by my image.

    Any thoughts?

    Thank you.

    Matt

    Material that you show in your Preset project are for a project SD DV NTSC 720 x 480 (4:3, BY = 0.9) Standard, so that your still images for this project must be adapted to about 720 x 480. Note: images will be square Pixels (NOMINAL = 1.0), so there is a slight difference.

    Regarding Genuine Fractals (human software), be a little cautious, that PrPro still limited format has capabilities of Import. I have an older version of Genuine Fractals and run these image via PS to the output, via Save_As PSD, the native format of the PS and a format as PrPro can work natively.

    Good luck

    Hunt

  • Mathematical function to show only the positive numbers?

    Does anyone know of a mathematical function to show only the positive numbers. I have a formula that returns an integer, if the integer is negative, I want to show ZERO. I'd rather not have to use a case statement.

    For example, if it returns 5, I want to see 5. If it returns 0, I want to see 0. If it returns-2, I want to see 0.

    How about this?

    (x + ABS) / 2

    where x is the column?

    When x = 5, you have (5 + 5) / 2 = 5

    When x = 0, you have (0 + 0) / 2 = 0

    When x =-2, you have (-2 + 2) / 2 = 0

  • DateTime objects - compare only the time part

    Hello. I have two Datetime objects on my form and I need to compare only only the portion of time (hh:miPM) of one against the other. No date information is important for me in comparison. Is there a way to simply compare the part of hour of each in a condition IF similar to what I have below? Any help would be greatly appreciated.

    For example:

    IF: induction_info.mf_time <>: induction_info.cbms_mf_time THEN
    ....

    You could covert a number as a date part

    IF TO_NUMBER(TO_CHAR(:induction_info.mf_time, 'HH24MISS'))!=TO_NUMBER(TO_CHAR(:induction_info.cbms_mf_time, 'HH24MISS')) THEN
     ..
    

    If you want to just check for the "unequal", you could even leave the TO_NUMBER part

Maybe you are looking for

  • iPad drops connection bluetooth/wifi for iPhone

    I keep my iPad connected to my iPhone all the time. I activate the personal hotspot on my iPhone and connect the iPad via bluetooth or wifi. Since the update to iOS 10 he constantly drops my connection to the iPhone. I've never had a problem before,

  • Windows 8.1 Fingerprint Sensor Driver does not

    Hello guys,. After I updated for Windows 8.1 my fingerprint sensor driver no longer works! my laptop is Envy-Dv6 7300 ex I trid download last update driver for Envy-Dv6 7300 ex driver fingerprint sensor digital validity 'sp58900.exe' file, but does n

  • How change machine ID?

    Yesterday, I was using an activated copy of NI Vision AI 2010.  Today when I went to open generator of vision on this same computer of the machine, it says that I don't have a complete licsense.  When I was in the License Manager, it says that this p

  • Need a Confirmation Page after a FAX?

    Never a fax "reception"? When you send a fax, there is a way to get a page letting you know where and when you sent it. You will NOT be able to get a PAPER COPY of what you sent. The confirmation page can be printed on the elements SENT or RECEIVED,

  • 2 wireless routers, I can get out, but not in

    I was hoping you might be able to help me with my setup, I've almost got it, there's just something that I'm missing.  I had a wireless router G (WRT54G) running well in my network for a while now, and since my wife and I both just 802.11n capable la