How can I generate a digital pulse with a specific width? I haven't been able to find any examples online. Thank you!

With the USB-6000 -- essentially none. It has only software timed digital I/O. Depending on your system you may be able to generate pulses at rates up to a few hundred Hertz but there will be a considerable amount of timing jitter. Tens of milliseconds may be common and even longer variations may occur occasionally. Please indicate what the timing requirements are for your pulses so someone may be able to provide a specific recommendation to meet your needs. Lynn