Amplitude varying on the change of the input frequency
I using NOR-5752 scanner to measure the analog inputs of high frequency. NOR-5752 is connected to the module FLEX RIO 7966R and entry to the NOR-5752 is provided using the SMB-2145 terminal outlet box.
Now, I'm the animals the 0.5Vpp @ different frequencies of tektronix generator of functions directly and by measuring using the digitizer. On the change of the frequency, measured amplitude is changed.
For the NI 5752 frequency response strange behavior is expected. CDA in NI 5752 is the TI AFE5801 (http://www.ti.com/lit/ds/slos591d/slos591d.pdf), and if you look at Figure 19 (p.13), you will see that frequency response of the ADC is only flat after about 1 Mhz. I checked this with our R & D Department and they said they are not aware of any combination of parameters that gives a uniform frequency response at these low frequencies.
If a flat frequency response is necessary for these lower frequency ranges, then the 5751 NOR is much better suited because it has a different ADC. (http://www.ni.com/pdf/manuals/375602b.pdf) The frequency response of this device is very flat in the low frequencies (see Figure 11 p.15).
So both devices, NI 5752 and the 5751 OR are designed to measure different frequency ranges. I hope this helps.
Tags: NI Products
I'm simulating a sine wave at approximately 1000 Hz (I'm variable according to the frequency with a slider), I would like to pass this signal by a lowpass filter (butterworth) with a high frequency of 2200 Hz cuttoff and a low pass to 2900 Hz frequency. However, the output after the filter frequency seems to be lower in the order of a thousand. the output frequency is about 0.1 Hz.
Y at - it someone who can guide me please to solve this problem, I tried different filters and I'm still having this problem, it would be incorrect sampling?
I enclose the block diagram and the front panel
Because you use express screws and the type of dynamic data...
You convert the signal of DDT (which contains the clock information) in a table DBL to perform filtering. Take it a DBL array (which contains no data of timing) and converted it into a DDT (which now contains no data timing). That's why when you try to view and analyze it you have lost all the data timing (frequency).
If you were to exit table DBL of your filter and build a wave form and provide the dt to the waveform of the sampling frequency control, then it will work.
Better yet, ditch the DDT and use waveforms from the beginning
I have an input range of 0 to 2000 Hz with a digital meter. I need to convert the signal in gallons per minute (GPM) using a non-linear process with 10 points on the scale. Here are the 10 points of the scale.
0 =.64 Hz DSP0 INP = 0.001 gal/MIN
INP 1 =.83 Hz DSP1 = 0.002 gal/MIN
INP 2 = 0.03 Hz DSP2 = 0.007 gpm
INP 3 = 0.83 Hz DSP3 = 0.025 gpm
INP 4 = 0.12 Hz DSP4 = 0.038 gpm
INP 5 = 01.16 Hz DSP5 = 0,126 gpm
INP 6 = 07.77 Hz DSP6 = 0,380 gpm
INP 7 = Hz DSP7 = 0.503 02.43 gpm
INP 8 = 016.33 Hz DSP8 = 0.637 gpm
INP 9 = 695,22 Hz DSP9 = 1.056 gpm
I need Labview to provide a linear display throughout each segment (i.e. between the sequential characteristic points) so that any entry in the system in Hz translates into a rate of GPM. Any ideas?
This VI works perfectly now. I had to increase the samples per second at 80 k so he could flatten. The function ' scaling and mapping ' is the key to this.
Be sure to enter at least 20 frequency of entry on the front block until you try to run it, increase intake of up to 1700 freq for GPM indicator work...
Thank you all for taking the time to help me.
Hello. Whenever I tried to change the input language to enter in other languages Firefox freeze (program does not).
Sometimes I type alt + shift or when I click on the language bar to select other languages.
It also happens with several languages (I've tested, maybe all), and I have tried various software/entry mode, including default windows, all freeze. Reset Firefox under help does not work either.
This problem occurs with Firefox and Chrome but not IE... Maybe not Firefox problem as this case w Chrome, but and ideas please? Thank you.
- Regedit could be changed, but do not hit internet setting.
- I can enter foreign language as long as I set the default language and don't change another language in the language bar. Currently I use the foreign language as default capture software and switch to English of entry in this software.
Have you attempted to assign a specific shortcut (for example, Shift + Ctrl + 1-9, 0) to select each language?
- http://support.microsoft.com/kb/306993 - HOW TO: use the language bar in Windows XP
- http://support.microsoft.com/kb/258824 - how to change your keyboard type
I'm probably being a jerk, but until someone can show me how then I'm a bit confused.
I have a loop iteration in a VI. The entries to the loop are commands of the Panel before, but even when the input values do not change, the output only.
It's good to start with (illustrated exit on stays of XY graph top of page even), but after the integration stage, the output displayed on the graph of the low XY continues to increase indefinitely.
The offset increases whenever the While loop runs (you can increase the time of scanning or the sampling frequency to see when it is run).
If someone could point me in the right direction, I would be very grateful.
(running LV 2010)
I understood what was the real problem: you need to re initialize the integral when the values back to zero. See below:
I have an application based FlexRIO where I do FFT on several incoming signals. The signals will be ranked so that I get first for example 4096 samples of Ch1 and Ch2 4096 samples, etc. This means that I don't have to do it in parallel of the FFT and I would like to reuse the implementation of FFT and windowing to reduce the use of resources.
I intend using the VI Express followed by the Express VI of FFT window scaling
and I'll use them inside a SCTL.
This figure comes from the section using the FFT and help illustrate the issue:
There is a discount to zero terminal for the fenestration and the FFT VI.
Are there internal registers in the windowing and FFT which force the image 1, image 2,... from the same signal or is it possible for the first entry in a framework of Ch1, the next frame belonging to Ch2, Ch3 gaze and so on and always get reliable results?
Another way to ask the same question: if I have to reset the window and FFT when changing the input signal?
When using the FFT of the LabVIEW FPGA vi express and windows nationwide express vi calculations are make it point by point so there will be no problem when going through different types of measures. Therefore, you should have no problem with your application.
Anyone know if you can change the input s video cable tv to use the HDMI input to watch TV on the Touchsmart 600-1050? The s-video works fine, but I thought I read somewhere that you should be able to use the HDMI as input source. So how to change the tv tuner to use HDMI instead of the S video cable? Thank you.
There is a toggle button on the back just above the HDMI port that allows to move forward and backward.
I need to change the display resolution to 1600 x 1024 after I changed my 1900 x 1200.
the problem is,
the "input not supported" message when I reboot the PC and does not allow me to do anything.
He presents himself before the logon prompt.
I restarted to fail safe with the command line with the id of the administrator and was able to change the resolution, but
He returns to the State ("input not supported" and no prompt connection) after I restart the PC
Thank you for your help,
I tried in vain,
I just used another monitor with a higher resolution, restore the previous resolution and swap the monitor again.
Advice from Microsoft about this is here: http://windows.microsoft.com/en-US/windows7/Add-or-change-an-input-languageWhat they fail to mention is that whenever you change the input language, you must also switch the physical keyboard. This is not useful... you can easily enter (say) German with an English keyboard, but as this feature is currently implemented, if you want to than the German spelling checker, you can also switch to a German keyboard.Or am I missing something?
I was curious - what happens if we give a QWERTY keyboard for the laptop computer French?I can confirm that a QWERTY keyboard works fine when an input language is defined on FR... This has always been my position of withdrawal anyway.I also read that the keyboard mapping is maintained in the registry, so my other idea is to assign an input EN language (which will force me to choose an English keyboard), and then change the mapping if it corresponds to the real keyboard (AZERTY).This sounds like a viable solution?
We recently had a Cisco TelePresence given 65 profile system. We have all the documents and I could not find instructions on the lcd screen. The screen has several entries and RS232. I would like to know how to change the input to the screen. Could someone explain to me how it would happen? I guess its more rs232 because I can't find any button on the unit. Is there an API for the screen? What are the communication settings for the screen?
Any help is appreciated more.
How to change the input to Dogri in Windows 8 language using visual studio 2005
To change the language in the Visual Studio program, I suggest you view the query in the Visual Studio forum:
I have two text entry:
input 1 & 2 text text entry.
I need to copy in the text of entry 1 input values to enter text 2.
How to apply this using value change listener?
I did the following steps:
(1) I chose 1 text entry and chose listener Value Change-> edit.
Type a new name for bean & class.
Should what the name of the method I add?
Any help please?
Just follow the steps below.
1 create a jspx page and drag drop two intput text on the page.
2 linking these two text of entry to bean managed on the basis and the scope of bean on bean with property name inputVal1, inputVal2 and backing
3. Select the input text 1, go to valueChangeListener property and use the existing bean and give some name of method and the copy of the code in the method below
inputVal2.setValue (inputVal1.getValue () m:System.NET.SocketAddress.ToString ());
4. set the autoSubmit = true for the 1st input text. Set partialTrigger = it1 (it1 is id of the 1st input text).
Now run the page
I can't use Ctrl + space to switch the input source, why?
because the command is CTRL + space.
I am currently working with the NI USB-6218 acquisition card.
In order to acquire a signal, I would like to be able to choose the input range of the DAQ with a digital command Wizard (and not opening the window of DAQ assistant) (as 'number of sample' and section 'rate'...)
Is this possible and if so, how?
Thank you very much in advance for your answers!
You can't with the DAQ Assistant so just click on and select "generate the Code of OR-DAQmx. You can edit the Subvi who performs the installation.
I have a program that takes parameters of an input file and then executes a Visual acquisition, using IMAQ, controlling some other hardware at the same time. The duration of the various stages of this process control settings.
There is a sequence stacked structure to control the playback of the input file, the initialization of the hardware, and then a while loop on the last image to actual purchase.
The user of the program now wish to have several games acquisition in the same race, possibly with different time settings. This would mean different iterations of the final loop, based on the parameters of the input file. There could be 5 games of acquisition on occasion, 3 on another, etc., in a performance of the program.
The structure VI already seems a little baroque, and I don't want to make it even more complicated.
I would appreciate advice on how best to proceed, because I'm really a novice of LabView.
If you use a "State Machine" architecture, you can do exactly that.
Instead of having a structure of stacked sequence, it is essentially a case structure in a while loop.
Each case represents a State.
So in your case, you would have a State for:
-reading the input file
-initialization of hardware
You can have the user controls the number of iterations of the State for the acquisition of data that you want to run.
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