tt usb flexcomp infiniti combine with labview

[orchid]

Hi all,

I am doing EEG signal acquisition. Now, I am using flexcomp infiniti with TT-USB interface. I am wonder if I can extract the EEG signal to Labview.  I mean, it is possible that the data acquisition from the signal to talk with Labview? I am using Labview 7.1 with vista. Hope that you guys can give me the idea.

Thanks,

Orchid

[Mathan]

Search will help better

[orchid]

I am using USB 6009. How am I gonna acquire the signal from the EEG. I connect TT-USB to USB port on my PC. Can I import the signal from the USB port of TT-USB directly to the VI? If I want to connect the EEG signal to the analog input on USB 6009, how am I gonna do so?

[Captain_Kirby]

Hi Orchid,

Your question is a bit open ended. I don't have personal experience with the instrument your talking about, or the interface (TT-USB,) but I can tell you that either method of importing the signal from the device may work. If you have an instrument driver for the device that works with LabVIEW, this may be the easiest solution. You can then use the VIs for the driver to simply read the signal and then process it in LabVIEW.

However, if you do not have an instrument driver, or cannot make one, you may be able to use the USB-6009, depending on the requirements of the signal. The things to keep in mind are the limits of your USB-6009. The device take a 14 bit sample at 48 kS/s. If your input signal is more then 25 kHz in frequency (and that is the absolute maximum) the device will not be able to read the proper frequency for the signal. We usually recommend that the input signal be at least 10x smaller then the sampling rate in order to capture the waveform shape as well as the frequency of the signal. The USB 6009 also requres that the signal be within +/- 10V. So you need to ensure that the signal does not exceed these limits. If your signal matches these requirements, or you can create a circuit to coerce your signal to these requrements, you can use the analog inputs of the device to measure a voltage signal and process it in LabVIEW.