USB-6218 for PC transfer speed

Hi guys,.

I hope to be able to taste 10 channels 10 Hz for about 1 hour, in Labview 8, on a relatively new core dual desktop PC.

First, I tried an Agilent34970a and concluded that, even if she can continuously scan quickly enough, GPIB in Labview transfer speed was too slow and the PC could not follow.

So I intend to implement a continuous sweep on a USB-6218 and then read it via USB, time-stamped data in Labview.

After reading about OR "sample streaming usb", my question is: approximately how long will be the transfer of data via USB? I'll be able to transfer time-stamped 10 channels at 10 Hz continuously in Labview, and still have cycles left processor above for other duties such as writing to the file .VI and update the screen.

The reason for which I am aiming for USB and no PCI/PXI is because I am concerned about the interference of the computer that affect my signals.  I read only analog voltages in the range of +-10V.

Thank you for your understanding.

You can acquire and store at rates of several orders of magnitude higher than 10 Hz. A good way to make sure you can follow has a producer/consumer architecture so that the file writes are made in a separate loop. Backup to the binary is also much faster than backing up to the text. Thus, the design of the program is important as well as the material you use.

Tags: NI Hardware

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