Looking for USB DAQ for AO using the external sample clock

Similar Questions

• Measurement error of the County of edge by using the external sample clock

  Hello

  I'm trying to measure the number of edges (rising) on a square wave at 5 kHz with a generator function on a device of the NI PCIe-6363. I configured a channel of County of front edge of counter at the entrance of the PFI8 device. I use an external sample clock that is provided by the output of the meter of a NI USB-6211 housing channel. If I acquire for 10secs then ideally I would expect to see a total of 50000 edges measured on the meter inlet channel. However, my reading is anywhere between 49900 and 50000.

  When I use the internal clock of time base to measure the edges, the measure is accurate and almost always exactly 50000. I understand that when you use the external sample clock, the precision of the measurements is subject to noise level of the clock signal. However, I checked the clock signal is stable and not very noisy. Any reason why there is an error of measurement and how tolerance should I expect when using an external sample clock compared to when you use the internal time base clock?

  Also, what is best clock Frequency (with respect to the frequency of the input signal) when using an external clock?

  Thank you

  Noblet

  Hi all

  Thanks for all your sugggestions. I was using an input signal with a function generator which had a range of 8V. It turns out that the reduction of the amplitude to 5V solves the problem. I was able to get accurate numbers with the 6211 external clock.

  Thank you

  Noblet

• NI6602 pulse width measurement: do I have to use an external sample clock?

  Hello

  In the example .NET 4 "MeasPulseWidthBuf_SmplClk_Cont", it is said in the comments that:

  An external sample clock should be used.

  Hi mola.

  This specific example measures of sample-clocked pulse width.  This type of measure is supported only on new hardware such as the X series cards and will not run on the 6602.

  Your application that you have linked uses Implicit timing, which means that the signal is using the sample clock.  In other words, at the end of each pulse duration which can be measured, the sample is deterministic locked in.  So you end up with a table in the buffer of each pulse width which is seen by the meter.

  Best regards

• Synchronization of analog and digital output with the external sample clock

  Hello

  First of all sorry for my English, I will try to explain what I want to do.

  I want my PCIe-6321 to send two custom signals (modification sawtooths) on a mirror controller. I would also like to generate output with my card at the beginning of each tooth of saw. Everything must be synchronized with an external k-clock signal of 100 kHz. The idea is that whenever the PCI receives a trigger to external clock, it sends two analog output voltages and when he received 1024 clock ticks it will also send a pic of triggering TTL. What I do is first prepare the map and after that in a loop sending and modifing the output values of the two signals and at the same time send a digital signal Boolean in each arch, so when's done it 1024 iterations of the loop I send an event to the digital port. Attached you can see.

  The problem is that I don't know how to synchronize both. Can I use the sample clock just to the analog output? I can use sample for the two outputs clock, or do I need to use the output of the meter? If don't know how to use it here.

  If I do nothing else bad/wrong, I would be grateful for feedback.

  Thanks in advance,
  Pablo

  I don't know how but I find the solution. I'm generating more than a positive value (as I was triggered maybe very fast the oscilloscope has been absent there). If I put the sample clock of digital output to use the sampling/ao/Dev1 clock that it doesn't, but if I put to use the same source as the OD (terminal where my external clock is connected), but the trigger to start the DO to be Dev1/ao/StartTrigger this works. I don't really know why, but it does.

  Thank you for your patience and your help. I put here the final code.

• External sample clock change takes a lot of time on the SMU-5186

  Hello

  I use the external Lv - niScope EX Clocking.vi example to define SMU-5186 using an external sample clock.  However, it takes a long time, 5-6 minutes, before I can get the first block of data acquisition.

  Then I run the example 'niScope EX Acquisition.vi Configured' to switch to dashboard clock. There are also 5 to 6 minutes on the first acquisition.

  I think maybe the SMU-5186 made some calibration when I change the source of the clock.

  Anyway is to ignore the calibration? Or make it faster?

  Thank you very much

  Yiming

  Yiming,

  Delays in acquisition are caused by calibration routines that must be performed on the engine to sample (ADC) every time that changes sampling rate.  This ensures our justified precision specifications.

  I don't know if you've noticed also calibration of Power-Up, which will take 5-10 minutes to complete when the unit is turned on.  This is mentioned in our specifications at page 18:

  http://www.NI.com/PDF/manuals/373257b.PDF#page=18

  I hope this helps.

  Nathan

• I work for an organization not-for-profit, and I wondered what might be a plan of this organization to use? Really looking for us in the first but are interested in the complete set of CC.

  I work for an organization not-for-profit, and I wondered what might be a plan of this organization to use? Really looking for us in the first but are interested in the complete set of CC.

  Please see this link

  Non profits

  If your institution not-for-profit or charity meets the conditions above, you can browse the education of Adobe software versions. Once you are ready to buy, you will be asked to present evidence or your qualification status when ordering.

• I'm looking for documentation on the Firefox command line arguments.

  I'm looking for documentation on the Firefox command line arguments. I use Ubuntu.

  http://KB.mozillazine.org/Command_line_arguments

  This doesn't seem to be what you're looking for?

• to choose the simple click instead of double click for selection using the mouse is no longer seen in Win 7 Pro

  possibility to choose the simple click instead of double click for selection using the mouse is not seen more in Win 7 Pro.

  where you can select the option, please? Thank you

  Hello

  You do not tell us where you are looking for it.

  "Click or double-click to open an item".

  http://www.SevenForums.com/tutorials/10117-single-click-double-click-Open-item.html

  See you soon.

• I have Adobe Reader XI with the package that allows me to send a PDF file and convert PDF files to Word. When I open a pdf file and you try to find the search shows no match, even if the word I'm looking for is in the document. Suggestions how to search?

  I have Adobe Reader XI with the package that allows me to send a PDF file and convert PDF files to Word. When I open a pdf file and you try to find the search shows no match, even if the word I'm looking for is in the document. Suggestions how to search?

  A scanned document is an image; You can't find a picture.

  If the image contains text, recognition of characters (OCR) will convert the 'text' in the image in real text (searchable, editable).

  OCR can be performed automatically when converting a PDF to Word, using the ExportPDF service.

  To run OCR inline in a PDF document, you will need Acrobat.

• Hi all OneHow can you buy an IBook UK not available in Indian store a store; When you change the status of your country, your billing information and credit cards won't work; is there a solution for this using the same method of billing.

  Hello world

  How can buy you an IBook of UK not available in Indian store a store; When you change the status of your country, your billing information and credit cards won't work; is there a solution for this using the same method of billing

  There is no solution, if it is not available in your area, you can't buy it.

• I have a complaint on my Mac Book Pro. I bought my computer in January 2016 and it has two problems: the first is the display of the retina that has many traces of the keyboard and as many times it freezes. I have looked for help on the local Apple Store

  I have a complaint on my Mac Book Pro. I bought my computer in January 2016 and it has two problems: the first is the display of the retina that has many traces of the keyboard and as many times it freezes. I have looked for help on the local Apple Store and support too, but it did not help. I would like you help me solve this problem.

  Thank you.

  Kelly

  Your machine is still under warranty, so you should take it to your local Apple store for repairs. Function late in January, you bought it, you still have phone without support. If you can't find any help on the Apple Store, then I don't know what you expect to find here. We have no way to check for problems you have described or any additional hardware, etc.

• "Sorry, we could not connect to the Microsoft services right now. If the problem persists, look for 'referee' on the start screen.

  "Sorry, we could not connect to the Microsoft services right now. If the problem persists, look for 'referee' on the start screen.

  This appears when I try to connect with Microsoft Account.

  I tried all the possibilities that was displayed in the link but when even the problem exists... below you please suggest me the solution to add the microsoft account

  http://answers.Microsoft.com/en-us/Windows/Forum/windows_8-networking/sorry-we-couldn

  Hi Nikhil,

  If you connect through a proxy, then I suggest you to try the steps suggested in this article and checking:

  http://support.Microsoft.com/kb/2778122/en-us

  Keep us updated on the results.

• Used the external drive for catalog/photos for months. Yesterday-> error msg: "LR cannot open the catalog"StanLRCatalogRepaired"on"Seagate Drive - LR Photos"because LR cannot save changes to this place. LR catalogs cannot be opened on removable disks,

  Used the external drive for catalog/photos for months. Yesterday-> error msg: "Lightroom can't open the catalog named"StanLRCatalogRepaired"located on the 'Seagate Drive - LR Photos' volume because Lightroom can't save the changes to this place. Lightroom catalogs not opening on the network volumes, removable storage, or read only volumes. »

  The first thing to do is to check if somehow the permissions for the drive Seagate or any of its relevant folders/subfolders has changed somehow (an OS update maybe?)

• Can we look for projects using priority?

  Hello

  Can we look for projects using priority?

  Concerning

  REDA

  Hello

  You can not. Priority is not a search criterion in all search screens.

  Thank you

  Gene

• What is it's ok to keep Satellite U500 closed while using the external monitor?

  Hello

  I have a Satellite U500.
  At home, I use a monitor and a keyboard. So I closed the laptop while working at home.

  I can do this, or would it damage the display or otherwise hinder ventilation properly somehow laptop?

  Thank you very much for your answers.
  Thierry

  Hi mate

  Of course, you can close the lid when the laptop is connected to the external display.
  I have a Satellite phone as well and it s connected to the external monitor.
  I also have a USB keyboard.

  I use the external keyboard instead of the internal keyboard for laptop and the cover is too firm

  Don t worried if he of ok!