What is the output impedance of the NI-9401?

[T2004]

I've looked high and low for this and can't seem to find it anywhere.

[Marshall_B]

Hi T2004

I too have been unable to find any answer to this question in the documentation we provide.  I am sure you will have noticed that the specifications manual for the 9401 does not give either input or output impedance and I am looking into where we can obtain this information.

In the mean time, are you able to measure the output impedance where you are? Something around 0.07 Ohms is typical for this sort of device.

Kind Regards

[Marshall_B]

Hi T2004

Following on from my last post, the device uses the TTL standard but the output impedance will largely depend on the mode in which you are using the device.  What sort of system set-up are you using with the NI 9401 and what is your application trying to achieve?

I may have understated the input impedance in my last post as I was basing this estimate on another device.

Were you able to measure the impedance at your end?

Kind Regards