NI 6509 sampling clock

[Graziano]

Hi everybody!
   Can anyone tell me about the sampling clock of NI 6509 DI/DO card?  In NI DI/O help, in digital signals there's an hint about a clock with 100 ns as clock cycle..... but can I take it for granted? Thanks!

[ambu]

 

Hi,

to understand better you request, please could you explain me what do you want to do with the 6509?

Thanks, regards

AmbuA

[Graziano]

Hi,
   with this card I'd like to simulate an old PC bus, with a slow bitrate.  So, I need to know the sampling rate of this card, to fit the rate of the bus.

   I have to comunicate with an old instrument, that is meant to "talk" with a PC-architecture no longer on this planet....

graziano

[ambu]

Hi

The 6509 board has an internal sampling clock that deals with change detection. This clock is not available to the user, it is strictly an internal signal that gives to the board a minimum pulse width for change detection of 100 ns. This board is a "static" digital board. The only function where the sampling clock comes into play is for change detection. These boards cannot do hardware-timed DIO. So I suggest you to constact a National Instruments sales that can suggest you the best board with clock hardware that fit your application.

Best regards

AmbuA

[Graziano]

Hi and thanks!


   The problem is in the price   ..... actually, I need my board to sample at 9600 Hz, so it is quite low as sampling rate, and I wish I can do the task with my 6509 board...

   I developed a simple acquisition application, in which I acquire a 1kHz square wave signal (the one delivered from a scope....), and, with simple computation, I deduced that my card acquire at about 600 kS/s, but.... is it hardware dependent??????? Does this rate depend upon the motherboard speed??????? Thanks!

graziano