Bandwidth, Sample rate and number of card

[Clint1000]

I've looked for a number of discussions that dealt w bandwidth and sample rate but none that I could understand.  If I have a PXI chassis w a bandwidth of 132 mb/s will that chassis support a DAQ (6229) w a sample rate of 250 Ks/s?  16 bits of resolution.  I also have a PXI DMM, a bunch of relay cards, a 8101 controller and a 3rd party amp card.  If yes or no can someone explain in laymen's terms how they came to this conclusion? Do I assume only one card will be talking over the back plain at a time?  if so the backplane is 500x's faster than the daq.  Am I understanding this right?

Thanks

[BrinkHombre · Accepted solution]

Hello Clint1000,

The PXI chassis with a 132 Mb/s bandwidth will support the PXI-6229 (which can sample up to 250 kS/s). Ultimately, when using the PXI platform, you can distribute the 10 MHz and/or 100 MHz system reference clock, or a clock divided-down from those oscillators, to any of the devices connected to the PXI backplane. The PXI chassis bandwidth typically only becomes an issue when using an external timebase.

• What Sample Rates Is my DAQ Board Actually Capable of Achieving?

Regardless, if you want to share any timebase or clock across multiple modules to synchronize the data acquisition, that can be done via the PXI backplane. Based on your description of your system thus far, the PXI chassis' bandwidth is not a concern.