Hi narutohaba,
You are correct that the USB-5133 acquires samples and saves each data as 8bits on the onboard memory.
Therefore, theoretically, the USB-5133 can acquire 30,000,000 samples with the 32MB/ch option.
However, you also need to consider the time that it takes for the USB-5133 to send the data to the PC, as you plan to acquire this much data at least every 17ms. USB cannot handle that much data in such a short period of time and therefore, you will need to consider different options.
I suggest using a different bus; PCI if you have a desktop PC, or even better; PXI if you plan to use more devices/channels in the future. PXI is a modular platform that allows multiple connections that a PC will not mostly be able to provide and it also includes synchronization features between modules that makes measurement a whole lot more diverse.
National Instruments provides PCI and PXI digitizers that should be able to meet your requirements so I recommend looking at the products listed in the page below:
High-Speed Digitizers/Oscilloscopes
PXI Platform
If you also plan to stream data for an extended period of time, you might also want to look at our RAID products.
I am sure if you contact the sales team in the NI office nearest to you, they should be able to help you out further.
Kind Regards,
Taiki Hoshi
Applications Engineer
National Instruments Japan
