Q: how do you select bandwidth for an oscilloscope?
A: Check manufacturer's data for either a bandwidth number of a number-of-samples-per second number. The bandwidth indicated the frequency at which a signal appears at half its actual amplitude (the -3 dBpoint). So, if you have a scope with a 200 MHz bandwidth, you can probably use it for accurate amplitude measurements up to about 160 MHz (my guess) or perhaps a bit higher. The signals will still provide good timing information at higher frequencies. If you see a samples-per-second value, say 1 Gsamples/second, I'd use 1/10th of that as the bandwidth. That's my rule of thumb. Watch the specs carefully, though, because sample rates can decrease as you turn on more analog channels. If you have big bucks to spend have a sales rep stop by for a hands-on demo with your signals.
For industrial control applications, or even a simple assembly line, that machine can go almost 24/7 without a break. But what happens when the task is a little more complex? That’s where the “smart” machine would come in. The smart machine is one that has some simple (or complex in some cases) processing capability to be able to adapt to changing conditions. Such machines are suited for a host of applications, including automotive, aerospace, defense, medical, computers and electronics, telecommunications, consumer goods, and so on. This discussion will examine what’s possible with smart machines, and what tradeoffs need to be made to implement such a solution.