Directly convert the analog signals into digital without passing through FPGA

To whom it may concern,
I am using a SCB-68 board R-series and I have a couple of technical questions:
In my system at the moment 8 analog channels are connected to the 8 input analog ports and then data are sent to a FPGA (PXI system 7852R). I am planning now to add other 4 channels to the system. Since over the total 12 channels I just need a very fast acquisition mode (using the FPGA) for 6 of them, while the other 6 can be sampled in a ms scale, I was wondering if you can suggest me something that I can use to directly convert the analog signals into digital and in this way used many unused digital signals provided with this model.
Thanks in advance.

yes it is correct, what do you need is:
software + (pc) + PXI + cable + chassis + C-series module
With embedded controllers, there’s no need for an external PC
With PXI remote control kits, you can control PXI systems directly from desktops, laptops, or server computers.
What Is PXI?
To configure a complete PXI System please go to: Build Your PXI System

Similar Messages

How to convert a analog signal to digital signal

Hello,
How to convert an analog signal into digital signal such that every sample of analog signal corresponding to 1.2V will be represented as '1' in digital signal and other samples of analog signal(that are not 1.2v) will be represented(converted) as '0' in digital signal.
And how to display both wavefroms or signals in graph indicators.
Thanks.
Solved!
Go to Solution.

If you have 1000 samples, and you want to convert to digital, you are going to get 1000 digital values. Attached is what I mean.
Unofficial Forum Rules and Guidelines - Hooovahh - LabVIEW Overlord
If 10 out of 10 experts in any field say something is bad, you should probably take their opinion seriously.
Attachments:
Analog_to_Digital Hooovahh Edit.vi ‏52 KB

Converting analog signals into digital signals

I have been transferring analog video cassettes to iMovie for further editing by using a digital camcorder (Canon MV960) between the 8mm video camcorder (analog camcorder) and iMac. I have always done this without any cassette in the digital camcorder, i.e. I have been using the digital camcorder as an analog/digital converter only.
I recently acquired iMovie HD 6 but this most recent version of iMovie refuses to import any signal from the analog camcorder via the digital camcorder. The window in iMovie is empty with an error message saying that "no tape". Well, it's true, there is no tape, there never was any tape when I used the previous version of iMovie!
Does this mean that I have to convert the analog video tape into digital video tape and, once recorded in digital format, the digital tape can be imported in iMovie HD 6?
All cable connections are OK:
- the analog film could be seen in the screen of the digital camcorder:
- digital video tape could be imported to iMovie HD 6.

Hi 5480:
try running a permissions repair (which should actually be done before and after upgrading software). You will find it in applications / utility / disk utility.
Also, this is a copy of how Matti Haveri (iMovie Guru) sets up analoge to DV:
My Analog to DV passthrough settings memo:
1. Take the tape out of the camcorder
2. Connect the analog device's audio and video to the camcorder's minijack, use the S-Video jack for video if the output device supports S-Video
3. Put the camcorder into VTR-mode
4. Select A/V->DV out: ON, in VTR mode's menu choices
5. Disable the info display on the the camcorder by toggling its DISPLAY button
6. Put iMovie (or other DV application) to the Camera Mode
The analog image should now appear on the camcorder's screen as well as on the iMovie's screen.
Note that if you have a tape in the camcorder, you have to put the camcorder's VTR into REC mode (you may pause the tape) but this is not advisable because it produces wear to the tape.
* Note that the SCART which comes with the European nEUtered TRV320E camcorder is Out-only.
Sue

Scb-68 and PCI-8331 what is converting my analog sgnal into digital%3F

Long ago, around 7 years ago, I worked on a project in which I interface photodetector to my computer through SCB-68 kit. The SCB-68 kit was connected to computer using PCI-8331 card.
Now, my input was analog signal from photodetector but at programming interface I was getting digital values for computation. Now my confusion about the conversion task done by which part of this connection?
SCB-68 was converting the input signal and supplying digital output? or PCI-8331 was doing digitization before delivering information to computer? or labview itself was doing it after getting signal from PCI-8331?
can anyone please clear me?
Thanks!
Solved!
Go to Solution.

The scb-68 is just a dumb terminal block. The pci-8331 is http://sine.ni.com/nips/cds/view/p/lang/en/nid/13179 and does not connect to photodetectors so your memory is flawed about the part number. An actual DAQ card would have done the conversion.

How DAQmx Create Channel for Accelerometer will convert the voltaage signal into g

HI all,
I want to know about DAQmx Create Channel for Accelerometer hoe it will do the convertion any one reply me
Regards,
Santhosh M

Most of the accelerometers that i have used till now are ICP devices.
They need about 5mA current to power them selves up. Other wise they give inaccurate output.
I guess you are measuring a raw time domain vibration signal.So you just need to
I have attached my own code of how i acquires a vibration signal usin PXI-4462 and 4461 modules. Keep it secret till i do my thesis .
You have to specify channel name ,device name, and remember to create the channel using the AI-accelerometer -accelerometer VI ,if you use any other form of this polymorphic vi then ICP source options will not be there and your sensors will not have the current to work properly.
Attachments:
New Microsoft Office Word Document.pdf ‏126 KB

Analog Signal to Digital a Primer

Many users have analog material sitting around, and they would like to get it into digital form, so that it can be edited. As this material is below SD (Standard Definition) quality, I will address the methods for digitizing it, so that it can be best edited in a DV Project. The output can be a DVD-Video, or other format, depending on what one wishes.
The process of getting this analog material into a digital form, is referred to as Capturing, and it is digitizing the analog material and writing it to a file, that can be edited.
One will need some method of getting the analog signals into digital form, and for connecting the analog output from their analog playback device to the computer. Though the analog signal could come from all sorts of devices, I’ll use a VHS tape deck in this example.
Since a VHS tape deck does not have an A-D (Analog to Digital) processor, and also does not have a a digital signal Out, one needs something in between it, and the computer. That “something” serves two needs: mechanical connection of cables and the ability to convert the analog to digital for use in an NLE (Non Linear Editor). That “something” can be a digital video camera with pass-through capabilities, a device, called a “bridge,” or a capture card inserted into a bus slot in the computer. All three have pluses and minuses.
The first two methods rely on one having a FireWire connection on the computer and will use the Capture module in the NLE software.
The digital video camera route is good, as one already owns it. Having one with pass-through capabilities is getting more difficult. The camera also has to have FireWire (FW, IEEE-1394a, or iLink) output, and the computer must have a matching connection.
An A-D bridge will do the same thing: allow one to connect the analog cables to one end/side, process the analog signals to digital and then output via FW to the computer. There are various such bridges available and two of the most often recommended makes/models are: the ADS-Pryo, and theCanopus/Grass Valley ADVC-110. Products, like the Dazzle lineup, just do not seem to work, or work well. I would avoid such.
A dedicated capture card performs the same task, with one exception. The card will mount into an empty PCI slot on the MoBo, and have inputs for the analog cables. The card will have chips on it, to digitize the analog signals and feed these to the computer via the PCI slot. These do not connect via FW, but have one drawback: they must, in virtually every instance, use additional software to do the actual Capture, as most NLE’s cannot directly see and work with them. Some of the included software Capture programs are better, than others. One common issue with many of these cards is a loss of sync, between the Audio and the Video. This is usually static OOS (Out Of Sync), in that it is usually off by a fixed number of frames, and does not drift over time. This can be fixed in the NLE, but is extra work. This ARTICLE will give you tips on correcting OOS.
Now, we are ready to begin the Capture, as our equipment and cables are all ready to go. We have a big decision in front of us - what format/CODEC do we use to Capture our digital files? Since we are doing an SD Project with non-HD (High Def) material, there is one fine choice: DV-AVI Type II w/ 48KHz 16-bit PCM/WAV Audio, using the DV/DVC CODEC. These files will be approximately 13GB / hour of Duration. Storage will need to be considered. These files are also I-frame, meaning that each “Frame” is rendered and available, so that frame-accurate editing is possible. The NLE will not need to do any processing, or conversion of these files, as even the Audio is ready for DVD-Video. Note: there will still be Conforming and the generation of PEK (Waveform Display) files, but the NLE will be able to do this quickly and efficiently.
Using AVI Uncompressed will get you nothing that you can see, other than larger files. Do NOT use any compressed format/CODEC, like MPEG-2, WMV, MOV, etc., as these will loose data from an already inferior source, and will then need conversion to be used, either with a stand-alone conversion program, or internally by the NLE. You loose quality and then have more work to be done. Do not let the temptation of smaller files lure you into using anything but DV-AVI Type II, and just accommodate the larger file sizes.
With the file format/CODEC decision made, the cables and devices hooked up, we’re ready to start the Capture. The exact operation will depend on what our equipment choice has been. See above for talk about additional Capture software, if one uses a capture card. Otherwise, we should be able to use the Capture module of our NLE. The first issue is that we will NOT have Device Control, as we would with a Capture from a miniDV tape-based digital camera, where we can control the mechanical aspects of the camera, during this process. As our VHS deck is hooked up to the A-D bridge, or digital camera w/ pass-through, via analog cables, our control signals cannot be sent to it. One would cue up the tape in the VHS deck, and then choose Record/Capture in the NLE’s Capture module, starting the Capture. Instantly, they would hit Play on the VHS deck, or via that deck’s remote control. This is easier the second time that one does it. I sit with the mouse in my right hand, poised over the Record/Capture button, and the VHS deck’s remote in my left hand, finger hovering over Play. It’s then a 1 - 2 push, and all starts. One can stop the Capture, if an unwanted section of tape comes up. The Capture module of the NLE will direct us on how to proceed from there, should more Captures be wanted. Some will just start up at a later point, and write an additional file for that portion of the tape, but some might require that one basically sets up a new Capture session One should investigate just what their NLE will require for doing multiple Capture sessions from one VHS tape.
When done, one closes the Capture module, and then navigates to the location that these DV-AVI Type II files have been stored in, and Imports them into the Project. This differs slightly from doing the Capture from a miniDV tape camera, as those Captured files are already in the Project.
Edit away, and Export/Share to the necessary output settings, file type and CODEC.
What about those VHS - DVD decks, the ones that will burn a DVD directly from the VHS tape? They seem so simple to use, and for the most part are. However, those DVD-Video discs, contain pretty heavily-compressed MPEG-2 AV streams. These MPEG-2's, besides being compressed, are in aGOP structure and are muxed (Multiplexed into one file with both a Video & Audio stream), plus there is often some Menus and navigation in the first VOB, the main container components of a DVD-Video. Many NLE’s can Import the VOB’s, and basically rip the MPEG-2 out of them, but that first VOB can be highly problematic, due to the way that most of those decks do the Menus and navigation. It is seldom 100% DVD-compliant by the DVD-specs. This can be a major problem. This ARTICLE will give you some background and tips on DVD VOB's.
Those dual-decks are good for doing one thing, regarding the DVD’s that they produce - provide one with an archival DVD-Video of the VHS tape, and not to be edited. However, the VHS side of these works well with an A-D bridge, just like a pure VHS deck does. I would strongly recommend that one does NOT use the DVD-Video portion of these, if editing will be desired. They cause many more problems, than they solve - just use them for an “archive” copy of the tape to a DVD-Video, for playback on a computer via DVD software or a set-top player, hooked to a TV.
What about film? Well, film is obviously analog, and one needs to digitize this to edit on the computer. The process of this digitizing is referred to as telecineing the film. While one can buy equipment to do this, it is expensive, and involves a lot of setup and testing to get the job done. There are many service bureaus, that offer telecining. Some are better than others. The main considerations are: care in handling of fragile film, how the telecining is done, i.e. frame by frame w/ a liquid gate, or just by straight projection, and then output format for the digitized files. Some of these services will offer a DVD-Video disc. Do not be tempted to do this. See above. Others will offer to write these digitized files to a miniDV tape, and this is just fine. One does then need a miniDV camera, or miniDV tape deck, to then do the Capture from, but the quality and editability will be preserved. The final delivery format would be to put these DV-AVI Type II files onto an external HDD. This saves one from having to do the Capture from miniDV tape, having to have a miniDV camera, or miniDV deck, and only Importing of those files would be required to get them into the Project. Many of these service bureaus will either sell you the external, or use one provided to them. Check out specifications for things like format of the external. FAT-32 will limit the file sizes to ~ 4GB max, and NTSF will have no such limitations. However, if the service bureau is on Mac, and you’re on the PC, their Mac’s can ONLY see FAT-32 HDD’s. Talk this over with the service bureau first, so that there are no surprises later on.
Hope that this helps,
Hunt
PS - also see this FAQ Entry for more detail.

the_wine_snob wrote:
Products, like the Dazzle lineup, just do not seem to work, or work well. I would avoid such.
Although I now have a Canopus ADVC300 I previously used a Magix 'Movies on DVD' USB device. I found the results from this to be particularly good and, to my ageing eyes, I see very little quality difference.
I think this is because Magix use their proprietary high quality codec (from their Pro products) to capture the footage. Like DV-AVI it runs around 10GB+ per hour. This can then, very simply, be exported to DV-AVI Type 2 for use in PRE. Note that there are some sound synchronisation issues with the 'out of the box' settings - but the fix is quick and I posted details to the Magix forum.
Would I revert if I could return my ADVC300 bridge? Probably not - the firewire connection and the PC seeing the box as a camcorder adds to ease of use. In fact I am pleased to have both. There are some things Magix does better than PRE7 (batch exporting each scene as an individual DV-AVI file being just one) and it has smart-rendering which is handy for quick clip splitting/exporting.
Cheers,
Neale
Insanity is hereditary, you get it from your children

Counting number of 1's present in digital waveform obtained by converting the pulse signals.

Hello,
I am using Analogtodigital.Vi for converting the pulse sequences into digital.signals.I am able to get the digital waveform representaion of the pulses.
But how to count the number of 1's present in the converted digital waveform.I want to count the number of 1's present in the converted digital waveform.
Thanks in Advance.
Solved!
Go to Solution.

Did you try opening the block diagram of Analog to Digital.vi?
It creates an uncompressed 2D array of 1s and 0s which represents the 16-bit binary A/D conversion of each element in the Y array of the input waveform. You can use the DWDT Digital to Boolean Array.vi to convert to a 2D array of booleans. Then convert the booleans to 1,0 and sum the array of integers. The sum should be the count of 1s in the digital waveform.
Lynn
Note: The attached VI is saved back to version 8.6. When I saved it for Previous Version a warning was generated about possible differences in versions. Let me know if it does not work, and what version of LV you are using.
Attachments:
Count bits.vi ‏25 KB

I have a 27" iMac with a broken hard drive. Is there a way to convert the existing hardware into a display monitor without too much technical work?

I have a 27" iMac with a broken hard drive. Is there a way to convert the existing hardware into a display monitor without too much technical work?

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How to convert the text field into currency field

Hi,
I have an requirement to converting the text field into currency.
If I convert directly it gives dump.
If I convert this to Numeric means it takes the decimals also as whole value.
Is there any FM to convert the text field into Currency field.
Please advice me.
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Hi,
I am on an SRM sytem, which unfortunately does not have th FM: PSSV_TEXT_INTO_FIELD_CURRENCY.
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Can i Do that manually, or is there another FM?
I have already checked code with write to or pack/unpack.
But without success yet.
Something like this:
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WRITE '12,99' TO g_str CURRENCY 'EUR'.
is no use for me. Finally I need to move g_str to my curr-field, which causes st22.
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How can i change analog waves into digital waves?

we had labview lab last week.. were doing fine if we have instructions unfortunately the professor will give us an exercise regarding baseband signals spectra.. were trying to download a trial software but we dont have any luck. the question asks for us to change analog waves into digital waves, measure the amplitude of the 5-th harmonic using spectrum analyzer.. i hope you can help me thnx..

After you are successful getting LabVIEW on your computer, put together something to at least show us you're up for learning. Then we can guide you to a solution that you've developed (mostly) on your own.
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(Mid-Level minion.)
My support system ensures that I don't look totally incompetent.
Proud to say that I've progressed beyond knowing just enough to be dangerous. I now know enough to know that I have no clue about anything at all.

I can't find this anywhere... how to convert mp3 (not music) into text without spending much $$$.

i can't find this anywhere... how to convert mp3 (not music) into text without spending much $$$.

function(){return A.apply(null,[this].concat($A(arguments)))}
hope1hope2 wrote:
i can't find this anywhere... how to convert mp3 (not music) into text without spending much $$$.
It's very unlikely that you'l
l find any help here; this forum is used only
for testing purposes. Unfortunately, I cannot suggest
another forum
Extra line breaks kindly supplied by the software.

Can we acquire the Analog input and Digital Input at

Can we acquire the Analog input and Digital Input at
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Hi Chenchen,
It usually simplifies things greatly if you use analog inputs to monitor both the analog signals AND the digital signals.
If you abosulutely HAVE to use digital lines, then the answer is, DEPENDS....
With the correct hardware and depending on how fast you want to collect data and how closely the measurements have to be syncronized in time, it can be done.
But first, concider using analog inputs to monitor all signals.
If you need to move forward with both analog and digital acquisitions, then post a new quesion and give us details on the hardware you are using and the other details we will need to advise you.
Trying to help,
Ben
Ben Rayner
Certified LabVIEW Developer
www.DSAutomation.com
Ben Rayner
I am currently active on.. MainStream Preppers
Rayner's Ridge is under construction

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Hi Shahid syed,
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Directly convert the analog signals into digital without passing through FPGA

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