Can NI PCI-6562 stream data out at high rates?

[ryanm]

Hi filmil,
 
I will be happy to help with your steaming question.  In order to better assist you, could you provide more information.
 
1) Are you trying to perform an acquisition, generation, or both?  If generation, is the pattern repeating?
2) How many channels are you using?
3) What rate will you be acquiring/generating?
 
Thanks,
 
Ryan

[ryanm]

Since your first post mentioned 400Mb/s, I will assume you are trying to generate at 200 MHz in DDR mode. If this is the case, channels 0-7 will be used for generation. Each generated sample will be 1 byte.  Since we are running at 200 MHz DDR, the rate of the generation is 400 MB/s (200 MHz x 2 x 1 byte).

 

Please note that 32 bit 33 MHz PCI's maximum theoretical bandwidth is 132 MB/s.  If the required data cannot be stored on the HSDIO card's onboard memory, it will not be possible to continuously stream data across the PCI bus at the needed rate, 400MB/s.  The fastest rate I have obtained, is ~120 MB/s using a Conduant Streamstor.  Working back from this rate, the maximum rate I would expect to continuously generate would be ~60 MHz (120Mb/s) in DDR mode.

 

Please let me know if you have any questions.

 

RyanMessage Edited by ryanm on 01-29-2007 11:30 AM