I just had a mysterious problem with 10MHz Digital IO card PCIe 6535.
Some background:
I typically use it for generating simple waveforms like: (X,0,...,0,Y,0,0,0,...) ; where X is a sum of two bits (e.g. bit 6 + bit 0 = 64 + 1 = 65), and Y is a single bit or zero. Sometimes, I keep it generating waveforms overnight.
Problem:
It omits some of the bits. For example, when I tell it to pulse (66,0,0,0,...) , it gives me (64,0,0,0,...); if I say (4,0,...), it gives me (0,0,...). Looks like it does an "X AND 65" before accepting the command (well, I pulse (65,0,0,0,..) most frequently). So, I quit the executable (compiled from a VI), and check the VI for software bugs. It couldn't find any, so I run the VI, it worked! Then, I run the exe again, it worked fine! So, in essense, what I did was restarting the exe.
Currently, it is working, but I would like to know what caused this (I suspect the card is already aging?) and whether I can avoid it in the future. Any ideas?
