Synchroniser un signal

Bonjour,
Je réalise l'acquisition d'un signal analogique sur la voie AI0 de ma carte PCI  6040E et je réalise le traitement et l'affichage à l'aide de Labview 6.1.
Cependant mon soucis est de synchroniser ce signal par rapport à un seuil et de l'afficher en continu pour pouvoir le traiter par la suite (FFT).
J'arrive tant bien que mal à réaliser ceci en modifiant les tableaux mais ce n'est pas ce que je désire obtenir.
Ci-joint mon VI. Pouvez-vous me donner un petit coup de pouce pour l'améliorer.
Merci d'avance pour votre aide. 
Attachments:
Acquisition d'un signal Analogique.vi ‏75 KB

Bonjour,
je pense que la réponse à ce problème se trouve au lien suivant :
http://forums.ni.com/ni/board/message?board.id=4170&message.id=10111#M10111
Attention à ne pas dupliquer les threads....
Merci,
Cordialement,
Benjamin M
NIF

Similar Messages

  • Synchronisation PXIe-6361 and PXIe-4492

    Hello,
    I'm trying to measure data with the two above mentioned cards in an PXI-Chassis (PXIe-1073) - the vi is attached.
    Unfortunately I'm not a LabView specialist and the measured signals of both cards have a time offset of app. 5ms.
    Can anybody tell me, how to synchronise the signals?
    Thanks for your help!
    Jürgen
    Attachments:
    2014-12-10 Synchronisierungstest F-a-s_V3.0.vi ‏112 KB

    Hi Jürgen,
    the sigma-delta ADC of the DSA device needs some samples until he has proper data.
    So you have to ignore the first 80 to 100 samples from the device.
    And for the sync, this KB shoul help:
    http://digital.ni.com/public.nsf/allkb/A133ED27DF9BCC5986256F2E004BA342?OpenDocument
    I hope this helps.
    Best wishes
    Dennis
    AE | NI Germany
    There are only two ways to tell somebody thanks: Kudos and Marked Solutions

  • Comment savoir quand les données ont été envoyées sur le port RS232

    Je dois gérer par commande CVI le signal DTR et j'ai besoin de synchroniser ce signal avec la fin de l'envoi des données.
    Merci

    Hi,
    Sorry to hear that you are having the problem with Acrobat.com.
    Would you provide additional information so that we can investigate the problem?
    Do you have multiple Adobe IDs?
    Do you have a Creative Cloud subscription as well?
    Which app did you use to upload or update the files?  Adobe Reader for iOS or something else?
    Can you go to https://cloud.acrobat.com/ in a web browser and see if you find the files?  Please check the "Acrobat.com Files" and "Recent Files" sections.
    Thank you.

  • How can I tell if signals from two devices are truly synchronised?

    Hi there,
    How does one check that signals from two devices (two separate devices in a single X-series chassis) that should be synchronised actually are?   I am using a PXIe6361 and PXIe4331 on a PXIe-1073, with Labview 2001 SP1 64-bit. All devices are using the Sample Clock from the 4331 device, and an AI Start Trigger, so they should be synchronised.
    I thought that writing the signal data to file and checking the time stamp for each column of data would be the most accurate, but I have been told that timestamps are software created and therefore don't reflect the actual time that the signals were acquired by the hardware.  When I do this, the timestamps vary by up to 150ms which is larger than I expected.
    If I set the x-axis of the waveform graphs (on the GUI) to "Time" then it appears that the first data sample is taken at different times for the two plots (one plot per device).
    If I set the x-axis of the waveform graphs (on the GUI) to "Ignore time stamp" (so that the x-axis just starts from 0 rather than a date-time) then the first data point occurs at "0" for both graphs. However, I'm not sure that this reflects the actual alignment of the signal.
    What is the best way to check if signals collected on different devices in the same chassis are actually synchronised?
    Thanks,
    Claire.

    Hi Lynn,
    Thanks for your help and for sending the demo.
    I understand the concept of how the signals will look if they're not synchronised and your demo shows that nicely. I guess I have been perplexed by someone else telling me that the timestamps in the output file (and following from that I assume timestamps on a waveform graph) do not give an indication of whether signals are synchronised. The reason they gave for this was that the timestamps are manufactured by the software, not the DAQ hardware.  They suggested that I put the setting "ignore waveform timestamps" on my waveform graphs, and then check that both signals come in at the same time (i.e. both start at zero), but I'm not convinced about this. 
    When I use an analog trigger, neither the timestamps in my output file or on the two waveform graphs are synchronised. If I don't use the trigger, then there is far less disparity in the timestamps in the output file. I've attached two output files here, and my VI.
    This is my first attempt to synchronise a voltage module and a strain gauge module on an X-series chassis, so I want to make sure that I'm achieving the best synchronisation that I can, and the difference in behaviour with and without the trigger worries me.
    Thanks,
    Claire.
    Attachments:
    without trigger.txt ‏5 KB
    with trigger.txt ‏6 KB
    Multi-Device Synch-Analog Input-Finite Acq-Analog Start_Claire_wDigitalin_12June2012 PTbridge.vi ‏196 KB

  • Synchronisation with a slower external signal

    Hello,
    I would synchronize 1 KHz continuous acquisition with an slower external clock. For example, I have a 100 or 200 Hz external clock and on each clock signal, I would read the acquisition buffer.
    On which pin of the DAQ board could I connect the external code ?
    Which function could I use on LabVIEW to synchronise the application with the external clock ?
    Thanks for your input
    Hubert Robitaille

    Hello;
    I don't know if I got your application need correctly by your description. By my understanding you want to have multiple external signals clocking each channel of the DAQ board.
    If that is the case, it's not possible, since the DAQ board accepts only one Scan clock pulse train. One thing you can do is to use the fastest clock as the external scan clock, and then skip some points on the other channels so you can collect the datapoints that match each scan clock needed.
    Hope this helps.
    Filipe A.
    Applications Engineer
    National Instruments

  • Synchronise digital pattern output(6533) with a external signal

    I use a PCI-DIO32HS and i want to synchronise an output pattern with an external signal(TTL;T=1.7ms).
    ie :every time external signal become high(every 1.7ms)
    my dio32HS output a define pattern on a line.
    How can i do this?Thanks

    Thanks for your answer but see attached file to see what i want to do.
    I want to control delay between trigger(input signal T=1.7ms) and ouput and control the width of the ouput pulse
    Best regards
    Attachments:
    signal.txt ‏1 KB

  • Synchronise NI 9239 & NI USB 8473 with Signal express

    Hello, I have a Cdaq 9174 chassis with an NI 9239 module (analogue input at 50Khz/ch) with Signal Express.
    And I wanted to know if we could acquire this four inputs synchronised with datas from CAN connection by using a NI USB 8473 ?
    Many thanks.
    Patrick.

    For me you can't use the driver NI-CAN is not compatible with Signal Express. The Only way you could use it with SE, is to pass through LabVIEW VI.
    You'll find in the below link the way to do it.
    http://digital.ni.com/public.nsf/allkb/359D14941D6936E98625729D008387D5
    I advise you to stay in LabVIEW this kind of program. It's easier.
    Best regards.
    Sabri JATLAOUI - Certified LabVIEW Developer

  • Synchronisation signal compteur

    Bonjour,
    Actuellement en stage, je dois faire un programme permettant la synchronisation
    de deux signaux distincts.
    Je travaille avec un Cristal liquide et une caméra. J'utilise la version 2012
    de labview ainsi qu'un boîtier NIDAQ9184 contenant les modules suivants: NI
    9401 ( qui sert de compteur) et NI 9263 ( qui sert à générer les signaux).
    Je voudrais que le signal généré pour trigger la caméra se déclenche à un
    moment bien précis et qu'il soit synchronisé avec la génération du signal
    envoyé au cristal liquide (CL). Le signal envoyé au CL est un signal carré
    (avec plusieurs paliers de tension) et modulé à 2kHz.
    L'objectif est d'envoyer un signal de front montant à la caméra afin d'acquérir
    des images. Lorsqu'on choisit un nombre d'image égal à 1, cela signifie que
    pour chaque palier de tension du signal CL, un pic de tension est envoyé à la
    caméra. Ces pics de tension (ou front montant) doivent être synchronisés avec
    le signal CL d'après une horloge commune.
    Dans un premier temps, on a tenté de visualiser les signaux: signal CL et
    signal CAMERA en sortie du module 9401 sur un oscilloscope: (référencé comme
    "génération des signaux CL et camera ok" dans le VI) et ça marche (l'horloge
    est présente (référencée comme "configuration de l'horloge" dans le VI))
    Puis nous avons tenté de rajouter un compteur (référencé comme "voie qui permet
    la communication avec la caméra" dans le VI) qui permet d'envoyer le signal à
    la caméra. cependant nous ne visualisons que le signal CL sur l'oscilloscope et
    nous n'arrivons pas à établir une communication efficace avec la caméra.
    L'erreur -201133 nous indique que la voie est déjà utilisée.
    Il me semble donc que le problème réside dans la façon dont je communique avec
    la caméra. Pourriez-vous m'indiquer si une erreur est présente dans le VI que
    j'utilise?
    Ci-joint les photos du boîtier nidaq ainsi que notre VI complet et un schéma de
    la synchronisation souhaitée.
    En vous remerciant d'avance
    cordialement
    Justine LETIEN 

    Bonjour,
    Voici un lien relatif à l'erreur que vous obtenez
    http://digital.ni.com/public.nsf/allkb/0495B7D5E2345DF386257730007EFD17?OpenDocument
     

  • Synchronisation de l'acquisition de signaux analogique par un codeur incrémental

    Bonjour,
    Pour mon stage, je dois réaliser un VI par le biais de LabVIEW. Ce VI sera utilisé dans de le cadre de la caractérisation de moteur électrique.
    J'ai à ma disposition un cDAQ-9174 avec 2 modules qui sont : 9215 pour les signaux analogiques et 9411 pour les signaux numériques.
    On me demande de faire l'acquisition de signaux analogique comme un capteur de couple, une sonde à effet hall, ... en fonction de la position angulaire du moteur. Pour déterminer cette dernière, j'ai un codeur incrémental avec une résolution de 5000 point sachant qu'il possède une voie A, B et un index de position.
    Pour le moment, je suis parvenu à réaliser un projet permettant de mettre la position angulaire et la valeur de la tension du capteur dans un tableau pour chaque position différente. Je rencontre un problème qui est que je n'ai aucun contrôle sur l'échantillonnage. En effet, je n'ai pas un pas angulaire constant. Si l'utilisateur fait tourner le moteur très lentement, on arrive à avoir un échantillon tous les 0.018°, mais s'il tourne à une vitesse d'environ 15s/tour, il se peut que l'on ait des échantillons tous les degrés.
    J'aimerai faire une acquisition de mes signaux analogiques à chaque nouveaux angles avec une résolution angulaire choisit par l'utilisateur.
    J'ai mis une pièce jointe montant mon VI réalisé.
    En vous remerciant par avance
    Cordialement
    Pièces jointes :
    VI.jpg ‏135 KB

    Je n'ai pas beaucoup de temps en ce moment pour entrer dans tous les détails mais le principe consiste à utiliser le codeur pour déclencher les acquisitions de manière matérielle.
    Cela revient à dire qu'un échantillon de chaque signal AI et un échantillon de position est lu à chaque changement d'état de ce signal de déclenchement.
    Dans les exemples s'installant avec LabVIEW, vous trouverez des VIs montrant comment procéder pour une acquisition déclenchée par un signal externe.
    Si la résolution de 5000 impulsions/tour du codeur est suffisante, il vous suffit d'utiliser le signal A (ou B) du codeur en l'adaptant si nécessaire pour les niveaux TTL de la NI-9215. En utilisant un LS7184 configuré en mode X4, cette résolution pourrait être facilement multipliée par 4 en ajoutant de plus un filtrage hardware pour éliminer les éventuels parasites sur les signaux.
    C'est un principe que j'applique fréquemment avec les cartes DAQ multifonctions PCI. Il faudrait toutefois encore vérifier que le déclenchement externe est supporté par les deux modules que vous utilisez; vérification que je n'ai pas le temps de faire.

  • How to input/output a digital signal and acquire an analog signal at the same time?

    Dasylab, version: 8.0.04
    Acquirement Card: PCI1002L
    When I use DasyLab to acquire the analog signals is no problem without digital inputs and outputs,
    and when I use DasyLab to input or output a digital signal is no problem also, but when I do that at the
     same time, DasyLab tell me the rate is too high and stop.
    so, I searched the manual book1 (user guide) for that, it showed me :
    To internally equalize measurement time and system time in the analog input, digital input and counter
    hardware modules, use the following settings:
       Synchronization: PC Clock
       Sampling rate: <= 5Hz
       Block size: =1
    the problem is, if I set the Sampling rate to 5Hz, the speed of the acquirement datas is not enough for my
    application.
    so, how to improve it? who can give me a example programm for me. thanks!
    by the way, I come from China, my English isn't good, I'm sorry.
    Allen, China.

    Hi,
    Have things changed over the years?
    I need to syncronise a digital output (Modul NI9474) and an analoge input (AI-Modul NI9203) module. I need to measure time intervals from a flank in signal A to a flank in signal B. I would like accuracies of the order of 1 ms. Currently, the signals are not synchronised, with errors of the order of 2 times the block length (block size x sample rate), sometimes much higher. The best I got so far was a block size of around 20 with a sample rate of 1 kHz.
    If I use the master and slave settings on the RTSL settings, my program doesn't run properly.
    If I use digital signals for input and output, I can syncronise them with RTSL settings and everything is good, but I can't always do that.
    Also, if I do anything in the GUI (such as scrollowing something or going to another window), my output gets screwed up properly.
    1. What can be done to synchronise AI with DO?
    2. Is there something that can be done to avoid messing up the output when something happens in the user interface? (I know that I am messing up the outputs as they make some valves switch and that is loud).
    Thanks in advance!

  • How to acquire analog signal and send a TTL pulse at the same time based on PXI 6123

    Hi,
    I am using a PXI-6123 data acquisition card, as the picture show in the attachment ,I want to acquire the analog signal of ai0 through reference analog window and at the same time send a TTL signal to trigger my camera. I have tried two methods, one is using the DAQmx Export signal.vi another is using DAQmx connect terminals, but when the data acquisition card acquire the analog signal, the DAQmx Export signal.vi and the DAQmx connect terminals sometime can send an TTL pulse ,sometime can not.
    I don’t know why?  or some other method that can achieve my arm is appreciated.
    Regards
    chunlei
    Attachments:
    method export signal.vi ‏21 KB
    method connect terminal.vi ‏36 KB
    Send a TTL pulse.JPG ‏288 KB

    Hi,
    Have things changed over the years?
    I need to syncronise a digital output (Modul NI9474) and an analoge input (AI-Modul NI9203) module. I need to measure time intervals from a flank in signal A to a flank in signal B. I would like accuracies of the order of 1 ms. Currently, the signals are not synchronised, with errors of the order of 2 times the block length (block size x sample rate), sometimes much higher. The best I got so far was a block size of around 20 with a sample rate of 1 kHz.
    If I use the master and slave settings on the RTSL settings, my program doesn't run properly.
    If I use digital signals for input and output, I can syncronise them with RTSL settings and everything is good, but I can't always do that.
    Also, if I do anything in the GUI (such as scrollowing something or going to another window), my output gets screwed up properly.
    1. What can be done to synchronise AI with DO?
    2. Is there something that can be done to avoid messing up the output when something happens in the user interface? (I know that I am messing up the outputs as they make some valves switch and that is loud).
    Thanks in advance!

  • 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

  • Input and output task synchronisation

    Hello,
    I need to generate finite digital and analog signals with the same rate and I want to measure analog inputs 10 times faster at the same time
    Now it looks like that:
    Analog output clock is used to generate digital output at the same rate, I use analog output StartTriger to start Digital output and to start analog inputs.
    is this synchronised correctly? What do I need to write in rate for digital output signal?
    My another approach is to do finite acquisition:
    Now I  am generating nalog output lets say at 10Hz, signal has 100 elements so it will take 10s to generate. In the same time I will acquire at 100Hz for 10s so I will get 1000 samples. I am thinking correctly? 
    As far as I understand aoSample clock is created from 20MHz timebase. ant that is my 10Hz, so I can't acquire at faster rate using that clock? 

    Dear Pawel,
    in DAQmx, there are fundamentally two ways of synchronizing tasks. One is to share a Sample Clock between each task, thereby ensurning that each sample is generated/read at the same time. This only works when the sample rae is the same for all tasks, so in your case DO and AO can be synced like this.
    The other method is to share a Timebase and a Start Trigger between tasks. This allows for different speeds for each task, and thus is the suggested method for syncing AO and AI in your application.
    The exact way of doing the synchronization depends on he device(s) you have. Let me know if you need any further help.
    Regards:
    Andrew Valko
    National Instruments Hungary

  • How can change or control tempo in Logic8 with incoming MTC signal

    Hi Logic users!
    I need help about MTC synchronisation. How can I change tempo /follow tempo/ with incoming MTC signal in Logic 8.
    Many musician and producer use Cubase and we need frequently use their tempo map. We use Soundscape HDR /there is our main equipment for audio recording – working very stable and reliably/ as MTC master because of I simply open in HDR any midi file exported from Cubase as „tempo map“ and Soundscape can read time information included in midifile and read and change tempo /so midifile i sused as tempo map./. In Cubase is very easy read incoming tempo information. You can switch in transport bar either „fixed“ tempo or „track“ for change tempo with tempo map or incoming MTC signal with tempo information but in Logic 8 I did not find any solution.
    Our setup is: 2 SSL Soundscape HDR, Logic8, Yamaha DM2000 mixing console – Soundscape is MTC master. From SS I send MTC to all other gear/ to Mac with Logic8 and to Yamaha DM 2000 for mix automation etc./. Logic is sync very well to incoming MTC signal from SS so it is OK but don´t read incoming tempo information.
    Please help

    MTC (MIDI Time Code) is time based, not tempo based.
    The tempo map will need to be recreated in Logic.
    MIDI Clockb is tempo based but as of version 8, Logic no longer reads MIDI clock. Doubt if that would've worked anyway.
    pancenter-

  • Using a SCC counter pulse train to control a SCC digital out signal

    I am trying to send a digital high signal on a SCC-Digital ouput module for a certain number of pulses generated by a SCC-Counter/timer pulse train. I have found examples of how to route such signals through PFI12 etc on an M-series board but I am trying to achieve this without referring to the card, just the SCC modules themselves.
    I cannot find a way to use the sample clock from the counter generated pulse train to synchronise the digital output.
    Is there any way I can do this without referring to the connected M-series DAQ card channels?
    Thanks in advance for your assistance.
    Cheers.

    Hi Phil,
    The SCC carrier is only conditioning your signals (i.e. if your signals are not in optimal ranges, bandwidth or need external excitation). The actual counters and all digital lines are controlled directly by the M-series board. This means you will never be able to refer to a counter in the SCC module.
    If you route the signals of the M-Series board, is as if you had done so externally from the SCC. Look at this example and might give you more insight to how to implement it (This is software timing). The hardware timing would be doing correlation DIO. Here is an example that needs to be modified to adapt to your timing: http://zone.ni.com/devzone/cda/epd/p/id/4414
    Hope this helps,
    Yardov
    Gerardo O.
    RF Systems Engineering
    National Instruments
    Attachments:
    Finite Dig Output High.vi ‏31 KB

Maybe you are looking for

  • Saving a PDF file to a Word Document

    Can someone please tell me how to save a PDF file as a word document?  When I do a "save as" with the doc extension, a window pops up that says, "Save as failed to process this document.  No file was created."  Any help would be appreciated.  Thank y

  • Find a class under Jar file

    Hi all, If I want to find out a class resides under what jar file, under Linux, I use this command: for i in $(find -name \*.jar) ; do if jar tf $i | grep �q className.class ; then echo $i ; fi ; done Does anybody know how can I do this under Windows

  • N80 - Bluetooth light not switching off

    Hi Just got my new N80. I paired it with my laptop. It works fine. However, the Bluetooth light keeps blinking although I have turned off Bluetooth and also made the phone "Hidden". I would like to turn the light off completely since, possibly, it wo

  • Unable to install FCS2 on a new mac that has better spec's than min. req,

    I got 2 new MacPro's with 2x 3.2Ghz Quads, 16gigs RAM, Nvidia 8800GT's, Snow Leapord fully updated, Each has the OS on VelociRaptor Drives and a extra 3TB of space...... My problem is when I try and install Final Cut Studio 2 on them...It says I dont

  • External Backup Disk Suddenly Won't Mount...

    Tried to shut down, restart and repair the disk with Disk Utility...but it won't mount. Any suggestions? It's a WD 500GB external backup disk...I use it for Time Machine. Thanks!