Maximising/ increasing sample rate of analog input port on NI USB 6289

[stealthsniper]

Hi! I am using a NI DAQ USB 6289 to do photonics IC measurement. The specification said that the maximum aggregated sample rate is 500kS/s, and since there are 24 analog input port, that means i can only utilize up to 125k/s per port (assume that I only use 4 analog input). And I would also need as many ports as I could. So, Is there any way that I can increase the bandwidth? Is it possible to achieve 500kS/s per port?

If i cant, would that means I would have to switch to using an FPGA?

[santo_13]

Unfortunately, no, that is limited by the hardware design.

You need to buy a better hardware with higher sampling rate and switch to PCI or PXI based hardware for higher data bandwidth.

[RIObotics]

Hi there,

Echoing Santo's comment, if you want many analog inputs sampling at 500kS/s per channel, you'll have to upgrade your DAQ hardware.  If channel count is important to you, you can consider simultaneously-sampled DAQ modules.  This way you won't have to split up your sample rate between the number of input channels you want to use.

A good DAQ model to consider is the USB-6346.  It's a 8-ch simultaneously-sampled DAQ that runs at 500kS/s for every channel.  If you need more channels, consider the USB-6349.  Or for a more modular design, you can use a USB cDAQ-9174 with NI-9222 modules.

BR

John

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