Minimum pulse width measured on the digital input port of a NI9401 plugged into cDAQ-9172

I have an NI9401 plugged into a cDAQ-9172.

I have 8 digital inputs on the port.  

I need to measure the high time of these input signals which are aperiodic.

What is the minimum pulse width I can measure?  The NI9401 datasheet says 100nS?

How should I go about measuring high speed pulses on this port?  Can I set the port to change detection then use either available counter in the cDAQ-9172 for pulse width detection?  

I am looking to measure pulses in the sub 10 uS range.

Thanks in advance for any pointers in the right direction.