USB 9162 VS cDAQ 9174

Bonjour,
J'ai déjà crée deux autres post sur mon problème mais cette fois je m'attaque au produit lui même!!!
http://forums.ni.com/t5/Discussions-de-produit-de-NI/Probl%C3%A8me-DAQmx-buffer-convertion/td-p/1187...
http://forums.ni.com/t5/Discussions-de-produit-de-NI/cDAQ-rapidit%C3%A9/m-p/1184553#M35939
Mon application met 250 ms à faire un traitement du signal lorsqu'elle fonctionne avec le NI USB 9162, et lorsqu'elle fonctionne avec le cDAQ 9174, elle met 750ms!!! Avec exactement les mêmes paramètres d'acquisition, de traitement et d'affichage.
Vous voyez le problème??
D'où ma question: le transfert de données par le hi-speed USB 9162 est-il plus rapide que celui sur le cDAQ 9174??
Si c'est le cas, comment ça se fait? Et y a t-il un moyen d'overclocker le cDAQ?
Je souligne le problème, car si celui-ci s'avère exacte, l'utilité de mon matériel serait remis en cause et cela m'amènerait à revoir mon jugement sur NI !!!
Merci
Arnaud

En faite cela concerne simplement le temps d'acquisition, car j'ai essayé sans le traitement du signal et le problème est toujours le même.
En faite, au départ je suis parti d'un vi express!! Ensuite j'ai généré le code pour comprendre comment cela fonctionné et pour avoir accès au paramètres style sensibilité!!
En générant le code, un sous-vi se crée (voir mon autre post 1er lien) ou on retrouve tout les bloc DAQmx (créer,..., supprimer), et avec les différents essais je m'aperçois que c'est se vi qui est plus lent ou du moins c'est se qui se passe qui est plus lent en fonction du USB-9162 ou du cDAQ 9174!!!
D'ou la question sur la rapidité d'echange des données entre les deux USB!!!!

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Tom W. wrote:
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John Weeks
WaveMetrics, Inc.
Phone (503) 620-3001
Fax (503) 620-6754
www.wavemetrics.com

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Defested wrote:
I am trying to communicate to an mpu6050 on a g-521 breakout board. I have a cDAQ 9174 with a 9205, 9211, and a 9401 c series modules. I am trying to talk to it using I2c protocol. I am just getting started here and havnt found much information on this. Can anybody give me somewhere to start?
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Attachments:
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Hi,
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REMOVED! NI USB-9162 and NI 9234 - drivers needed

Sorry...
Wrong board. I moved this to Dasylab forum.
Regards,
Teppo
Message Edited by WWD_test on 01-14-2010 02:10 AM
Message Edited by WWD_test on 01-14-2010 02:14 AM

I don't know that I understand the question. You need the drivers installed that came with the hardware, including NI-DAQmx and the NI Measurement and Automation World.
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- cj
Measurement Computing (MCC) has free technical support. Visit www.mccdaq.com and click on the "Support" tab for all support options, including DASYLab.

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Attachments:
USB 6501 error.docx ‏24 KB
USB 6501 period measurement.vi ‏26 KB

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USB 9162 VS cDAQ 9174

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