Rise & Fall Time, Pulse width, Duty Cycle Oscilloscope Tests

[walters]

What circuits or When have you guys measured

1.) Rise & Fall Time of a circuit
2.) Pulse width of a circuit
3.) Duty Cycle of a circuit

When you did do these types of Rise & Fall time, pulse width, Duty Cycle measurements on the Oscilloscope what were u looking for that was errors in the circuit?

How would I know viewing on an oscilloscope what is BAD or something wrong with the circuit when looking at the Rise & Fall Time, Pulse width, Duty Cycle of a circuit?

 

[godfreyl]

How would I know viewing on an oscilloscope what is BAD or something wrong with the circuit when looking at the Rise & Fall Time, Pulse width, Duty Cycle of a circuit?

That depends on the circuit and what you expect it to do.

The oscilloscope can tell you what the circuit is really doing. If that is different to what it's supposed to be doing, then there is a problem.

e.g. If the rise time is supposed to be 1uS but the oscilloscope shows a rise time of 4uS, then there is a problem.