clock generator and 6501

[BiedaK]

Dear Sirs,

In my application I need three 8-bit ports.
My boss bought a 6501 USB device and I communicated with it and it works properly.
Now it occurs that I need one clk output to establish 3 clk frequencies: 50Hz, 47Hz and 52Hz.

The problem is that on 6501 there is no clk output.

Is there any Ni Device that covers 3 ports and 1 clk output, or other device eith  clk output only?

Is it possible to echange 6501( I have other packed) for other device in Ni distributor?

Best,

Chris

[SnowMule]

6501 is all software-timed... not a good choice for applications requiring reliable clocks and timing. 

You'll need to step up to the USB-63xx series to get good hardware-timed counters.

[AECmartin]

Hi BiedaK,

SnowMule is right. If you use software timing, you will be limited by USB latency and your operating system timing (on Windows it is 1kHz). My recommendation would be to use e.g. NI USB-6341 ( http://sine.ni.com/nips/cds/view/p/lang/cs/nid/209069 ), there are 24 bidirectional digital I/O. You have also possibility to use 4 counters, it is also good way how to create periodic signal (even more complicated one than 50% duty cycle signal with defined frequency). In addition, there are up to 16 single-ended analog inputs and 2 analog outputs, with STC3 chip on board ( http://www.ni.com/white-paper/9384/en ).

Best regards,

Martin