Problems to measure a signal with 10kHz frequenz

Hello,
i want to measure a signal at 10khz frequenz.
My problem is that from 100Hz above i dont get a clear Signal.

Daniel,
Could you provide more information about your task.
- What type of signal is it (sine, square wave, etc.)?
- What hardware are you using to measure the signal?
- What type of input are you using (analog in, digital in, counter)?
- How are you performing the measurement? What functions are you using? What development environment (LabVIEW, C, etc.) are you using? Can you attach an example of your code?
Christian L
NI Consulting Services
Christian Loew, CLA
Principal Systems Engineer, National Instruments
Please tip your answer providers with kudos.
Any attached Code is provided As Is. It has not been tested or validated as a product, for use in a deployed application or system,
or for use in hazardous environments. You assume all risks for use of the Code and use of the Code is subject
to the Sample Code License Terms which can be found at: http://ni.com/samplecodelicense

Similar Messages

  • Measuring DC signal with ac coupling

    I'm TOTALLY new to Labview. I was trying to use NI DAQ 4472 for measuring DC signal with large DC offset. I would like to see an example that sets AC coupling for filtering the unwanted DC offset. I found an example with "DAQmx Channel Property", but I need help in connecting it with the block diagram. I have attached my block diag. and and help in connecting the DAQmx Channel Property Node is highly appreciated.
    Thanks.
    Attachments:
    Sensor_Configuration_Test.vi ‏60 KB

    Good afternoon MiamiVipul,
    Thanks for contacting National Instruments with your issue, we'll try and get you up and running as quickly and efficiently as possible.
    Look like you've got the right approach to your problem.
    In order to integrate a property node into your code, you simply have to wire the task reference and error cluster in line with the rest of your code.  I.e. after you create the task, you will have the purple task reference out as well as the pink error cluster out, wire those to the corresponding intputs on the property channel node and then wire the task and error out of the property node into the DAQmx Create Channel vi. 
    Have a look at the examples by going to Help > Find Examples (Browse Tab)  > Hardware Input/Output > DAQmx > Analog Measurements.  There are a variety of different measurement types which you can start from to give you a strong idea of the general DAQmx coding principles.  Several of these also use Property Nodes.  For example Acq&Graph Voltage - Int Clk-Analog Start w Hyst.vi
    You mentioned you want to measure "DC signal with large DC offset", which I'm assuming is a typo, as AC coupling is of course designed to remove the DC offset so you can measure the AC signal.  
    Best of luck with your project.
    Sincerely,
    Minh Tran
    Applications Engineering
    National Instruments 

  • How to measure different signals with PXI-2501

    Hello everybody,
    i have a an understanding problem.
    I have a PXI-2501 switch and i want to measuere signals with the pxi-4071, so far so good.
    I did some voltage- measurements and everything worked fine. Then i disconnected the power source and measured the temperature with a PT1000 in four-wire-mode ... also worked fine.
    But i want to measure voltage and temperature, in the same VI, so i connected the voltage signal on CH0 and the PT1000 at CH5 (in four wire mode), and now i get problems. The temperature is fluctating. There are a few measurements that seems OK, and then i see some that are far away from the truth.
    The VI consists of a state machine, the measurements are done in different states, of course with the correct scan list for each measurement.
    Any suggestions? Am I doing something completely wrong?
    Thanks
    (and excuse for my english )

    Hi Roman,
    id I understand you right:
    The temperature measurement works fine, if the sensor is directly connected to the 4071, but if connected via the 2501 you see the big deviations?
    Have you measured the the resistance of the Switch-Matrix yet?
    kind regards 
    Heinz

  • Sequence 1create output digtal signal- 2 make microsecon​ds delay or less- 3 measure digital signal with board 6023e

    hello
    I need creat a digital signal and for this i use a counter output and then i need creat a delay after  a signal measurment and for this i use again a couter. My problem is how i can make this delay betwen create and measure a signal. this delay must to bethe shortest  possible  and precise. une of my attemps was make  a sequence and for make the delay i create a task for une virtual output with max frequency 5000000hz and just une pulse but i dont know how many time the labview get to go by the first task ( creat a output pulse and ent it) to make tis task before discribed to the last task (measure a digital sinal). Another thing that i dont know is how many time the libview get to create and eliminate une task. Une information beyond the kind of board (6023E) that can be useful to help me  with this problem is the information about my pc in this case i use a pentium4 3Ghz.
    thanks  

    ...My problem is how i can make this delay betwen create and measure a signal.
    ...how many time the labview get to end one task and start another one.
    What I tried to say is, that even if you use the counter of the 6023e-Board
    to create the delay and trigger the measure via LabView under Windows,
    you leave the realtime-path. Executiontime of LabView-code is then not
    determinated.
    One way to solve this, is triggering measurement via hardware and use LabView to read Data from the Buffer of the DAQ-card.
    You can find more info about DAQ in the "measurements manuall" of NI, delivered with your LabView Software.
    Lorand

  • Why do I get Error 33487 when measuring TC signals with FieldPoint

    I am measuring temperature with a cFP-2000 and cFP-TC-120 using K-type thermocouples. I am intermittantly getting Error 33487 (Signal out of measurement range) from FP Read.vi the first time the unit tries to take a data sample after startup (it automatically starts colelcting data once it is done booting). The temperature should be nowhere near the signal limits (about -450F to 3200F) - when the data is collected without an error I am seeing 75 - 250F. What could it be?

    Hi,
    I have posted you an answer through the standard support channel, let me know if that answers it.
    Regards
    Andre Oliveira
    Applications Engineer
    National Instruments

  • Measuring PWM Signal with NI9423 with C-RIO 9073

    Attachments:
    Simulator1.vi ‏114 KB

    Eh..sorry. I do not know what happened, but it seems like my questions is gone in my previous post.
    Let me recap, I'm new to NI Components and LabView.
    I wanted to measure 8 PWM Signal generated from a controller (200Hz, Max 4A, 24Vdc).
    WIth NI engineer's suggestion, I bought cRIO 9073 and NI 9423 for this purpose.
    I have created a VI for this purpose. It seems to be working at first, but later on, the value read by the NI 9423 becomes unstable even though the out put signal from the controller was stable.
    The value read by 9423 just goes up and down with an increasing PWM signal from my controller.
    below is the setting for the 9423.
    Thanks.

  • Setup Problem in Measure 2.0 with USB-6009

    I purchased a USB-6009 for my laptop (running XP Pro), and installed the NiDAQmx vers. 7.5 that came with the unit. I opened NI explorer, and tested the unit in there (using Test Panel). It worked nicely there, though the indicator light on the DAQ board  was blinking. I then added my copy of Measure to the computer, but when starting MS Excel, I get the error message "Measure unable to detect a valid installation of NI-DAQ. Please install NIDAQ before using Measure for Windows Data Acquisition Add-In."
    Is there a step I missed? or is there something wrong with my applications?

    Hello dlclough,
    Measure 2.0 is a Legacy application that works only with our Traditional NI-DAQ Legacy driver, not NI-DAQmx which supports the USB-6009.  The blinking light on the USB-6009 simply indicates that the device is receiving power.  However, if you go to this section in the Readme file for NI-DAQmx 7.5, you can look at your numerous options for programming NI-DAQmx.  You can also use VI Logger Lite which is installed with the driver for simple data logging applications.
    Regards,
    Laura

  • Measure Vac signal with Vdc IO FP-AI-100

    Sir,
    We are trying to use hall-effect current sensor to measure motor currents. High accuracy is not required. So we are thinking of using FI-AI-100 to do this. But output of the hall-effect current sensor is about 0-5 Vac/60Hz. I wonder whether or not we can use FI-AI-100 here and what we may read back.
    Anyone has any experience ? Thanks in advance.

    Sir
    Although the FP-AI-100 can handle the voltage you are going to be reading, it is not meant to be reading AC voltage. You would be able to accurately see the 60 Hz frequency of your signal, due to the ability to sample faster than twice your frequency, but you would not be sampling fast enough to accurately depict all of your peaks.

  • Count edges of AI signal with NI 9221

    Hi,
    I'm trying to count edges of an AI signal that are acquired with an NI-9221 on a cDAQ. The average frequency is about 1kHz.
    I'm acquiring the signal with 10kHz but don't get the right amount of edges. 
    Is
    there any solution for this problem. I know, of course it would be
    easier to use a CTR-modul but my signals doesn't fit with the specs.
    Thanks for any help
    Yves

    Yes, I know. I wanted it to be posted in the Labview forum and hadn't realized my mistake.
    But I still don't have any solution....
    Yves

  • Measuring floating signals

    I am using a PCI-6024E DAQ board and I would like to measure a floating signal. I tried to measure the signal by connecting the two leads each to an analog input (like I believe you are supposed to) but damaged the board I was using. The two leads are always within 5 V of each other which should be fine. However, the leads can have a voltage with respect to ground of something more like 120 V at times. It would be disastrous if this signal was connected to ground (which is probably what caused my board to be damaged). Any thoughts on whether or not I can safely measure this signal with my DAQ board? Thanks.

    Hello,
    Thank you for contacting National Instruments.
    The PCI-6024E data acquisition board has a working voltage specification of 11V that means that the board will continue to measure correctly till the input voltage on either of the analog input channels is not greater than 11V. The board also has a power on over voltage protection of 40V which implies that the board will not get damaged for voltages up to 40V while the board is powered on.
    To measure a signal that has a common mode voltage of 120V you will need to use signal conditioning with isolated analog inputs. Two simple solutions are:
    1. Use an SCXI-1120, 8-Channel Isolated Analog Input Module with an SCXI-1327 terminal block. This configuration will let you measure voltages in the range of +
    /-250V.
    SCXI-1120/D User Manual
    2. Or you can use an SCC-AI04 module in a SC-2345 chassis which has an input voltage range of +/-5V and provides an isolation of 300Vrms.
    SCC-Ai series User Manual
    If you are interested in purchasing these solutions you can contact a sales representative at NI by calling (888) 280-7645.
    Regards,
    Nipun M
    Applications Engineer
    National Instruments

  • How to measure a current signal with NI 6211?

    How to measure a current signal with NI 6211?

    Hi Clecio,
    This is a charge accelerometer. It is different from the IEPE accelerometers that outputs a voltage signal.
    You need a charge amplifier. Then according to the charge amplifier output we can select an appropriate module to measure the signal.
    It is not possible to measure charge accelerometers with NI 9234 directly.
    Best Regards,
    Rodrigo Schneiater
    Application Engineering
    National Instruments Brazil
    If this information was useful, please click in the 'KUDOS!' beside.

  • I meet a lot of 3G signal when a call signal disappears 3G! I read the manuals and anything I find the problem! I do so with other brands and other cell does not, the same goes when I receive a call!

    I meet a lot of 3G signal when a call signal disappears 3G! I read the manuals and anything I find the problem! I do so with other brands and other cell does not, the same goes when I receive a call!

    Who is your carrier?  Are you actually on 3G?
    Do you have 3G turned on or off?  Settings > General > Network > Enable 3G

  • Can I measure with DAQ NI 6115 differential signals with a value of 0-5 V? ( ACH0-3 - is then outside the spec of +-2.5V)

    I have to measure differential signals (0 to 5 V level). Unfortunately the maximum working voltage of the analog input channel of NI 6115 S-serie - is +-2.5 V. What will happen? Will the performance of the NI 6115 decreases? And - can I get an error when I connect fast signals to - (!), because the inputs are pseudodifferential?

    Hello matops,
    I don't think you should be running into any type of problem trying to measure a 0 to 5 V differential signal using the NI 6115. The maximum working voltage for the negative input is specified at +-2.5 V, meaning that you can have a maximum common mode voltage of 2.5 V in your measurement system. However, the maximum working voltage on the positive input is +-11 V or +-42 V, depending on your voltage range. If you are going to be going above this limit, then you may want to reconsider your measurement setup as you could damage the hardware.
    Though pseudodifferential signals are usually composed of a signal on the - input that is slow to change, the 6115 is specified at a maximum sampling rate of 10MS/s, and thus I think it is going to be OK to co
    nnect a fast signal to these inputs (depending on what your definition is of a fast signal).
    Hope this helps.
    Jared A.

  • Measuring digital signals coming from the HSDIO (PXI-6542) with the DMM (PXI-4070)

    Hello,
    in attachment you can find the program I'm using for my measurement: I'm generating and acquiring digital signals with the PXI-6542 and at some trigger point of one of those digital signals I'd like to capture the measured values on a plot with the Digital MultiMeter (PXI-4070).
    It does work if you configure the generation repeat mode as continuous, but if you do have a finite repetition (repeat count is 1) it doesn't react on the trigger, as if it can't find a trigger. On the other hand, if you have a finite repeat count of 30 or more it does react and triggers correctly again.
    First I though it had something to do with autocalibration before the measurement takes place, but If you do a highlight execution (stepping through the program) it looks like it measures before the generation session is initialized.
    Is there a way to measure correctly when the repeat count is only 1?
    Thanks in advance,
    Jürgen

    Hey Jürgen.  I apologize that you haven't gotten an answer yet to your post.  I looked at your code and had some questions.  What is the source of your trigger to your DMM?  I see that you're exporting the data active event to PFI1, and your comments indicate that PFI1 and PFI2 are connected to give you a start trigger for your digital acquisition.  Exporting the data active event with a finite or continuous pulse should only give you a single edge per run, though - you wouldn't get a pulse each time.  Is your trigger coming from a data line?  I didn't see any line in your included data that would indicate a single pulse.
    The other thing that I noticed is that you've got no timing dependency between your HSDIO code and your DMM code - they're in parallel with each other.  Thus you could get different results run-to-run, since it's not deterministic as to which parallel "thread" that LV will start on first.  LV may switch back and forth several times, but let's say that LV reaches the HSDIO Start command before reaching the DMM Start command - in that case, the HSDIO device may finish it's entire operation before the DMM ever starts looking for a trigger, and thus never get the trigger at all.  I'm not sure why this would explain why you're seeing the finite case work and the continuous case not, but I wanted to point it out because it could bite you down the road.
    I hope some of this this helps get you going in the right direction.  I'd also suggest posting HW-centric questions in the appropriate form.  There are Digital forums and DMM forums that might help you reach people that will be more familiar with your particular hardware.
    Chris

  • My MacBook can find my wifi says it has perfect signal and it's connected. But there is no internet and I've have had this same problem at my house my friends and wifi source I use. Has anyone had this problem or can help me with this thanks

    i have a MacBook pro. I'm trying to connect my Mac through wifi at my house, it shows my router says it's connected with full signal yet I have no internet. So I thought I would try it at my friends house but I had the same problem. the Internet connection and wifi were on, as our iPhones were working through wifi. And my friends Mac works via wifi at my house. Just mine dosnt has anyone had this problem or can help me with this problem thanks.

    Try this.
        Power off the router. Unplug it from the wall. Wait a while.
        Plug it back to the wall. Power the router on. Wait until all the lights are lit properly. It will take a while.
        Restart the computer.
        Start up in Safe Mode.
        http://support.apple.com/kb/PH14204

Maybe you are looking for

  • Perfect use of Automator if I can get it to work with QT or FCP

    Hello, I've spent all day trying to wrap my head around Automator and I jumped right into it with the following task: to take 150 video clips (uncompressed 8 bit QT files) and add an opening graphic, a closing graphic and to save as a new version. Do

  • Were I can get the table of PIKMG

    Dear Guru, I want to no from which table I can get the data of Pick Qty. When I go to VL02N Pick Qty, their I can find Structure : -  LIPSD Feild : -  PIKMG. But when I am searching in PIKGM I am not getting any data. So, will u help me to get the ta

  • STO(MM) get commitment on a Sales order forcasting !

    Dear friends ! A Sales order get a commitment on a Sales forcasting ! But we need to set STO to make the same commitment! Does anyone has already seen this scenario ? best regards, Ale

  • Help with standard deviation assignment

    I am having trouble with the std deviation portion of one of my assignments. Plus, only 5 test scored will print, not all 6. Could you please take a look and see what I am doing wrong? Is there a way to add the find the std dev. and mean for each sem

  • FPM getPropertyValue Problem

    Hi people, how are you? I m trying to use a custom Property into my FPM View. I m using it into a custom FPM Application to. My WD code is very simple... Into the onInit method I just access the property using the getPropertyValue from IFPM instance.