hardware triggered AI with USB-6259

[shoneill]

I have an application (see here) on a PCI-6251 (M-Series).

I need to know if this will work on a USB-6259.  Both are M-Series with very similar specs (1.25 MHz 16-bit, Correlated DIO and so on).

My question is this:

Can I use the hardware-triggered AI (at up to 1MHz) with the USB-6259?

I assume so, since the main chip is the same, but I'd like clarification.

The other question is, if it can, why did I buy a PCI version? (No Answer required 😉 )

Shane.

[Christian Mergl]

Hi shoneill,

Yes it's possible, you can also search examples for triggering, retriggering analog input!

Regards, Christian

[shoneill]

Yesterday, I transferred a system (direct CMOS linear sensor read-out) to a customer's PC which was using a USB-6259 versus my PCI-6251.

I had some synchronisation problems, and after investigating the signal quality with an ascilloscope, the counter output (1MHz) had lots more ringing than on my card.

We also saw some cross-talk between channels, but this may be a cable problem.... This cross-talk was causing the EOS to be interpreted too early due to a (20%) cross-talk from the base clock.

Are there any significant electrical quality differences to be expected between the different versions of this card?

We were using the same cables and same sensors with the same power supply for both comparison measurements......

Shane.