What an Oscilloscope Reveals About a Crowded Circuit Board
What an Oscilloscope Reveals About a Crowded Circuit Board
Voltage traces can expose brief faults that a handheld meter averages away.
An oscilloscope draws a signal over time. Engineers use a trigger to hold the trace around an event such as a sudden voltage dip or a rising clock edge.
The measurement setup can distort what appears on screen. A long probe ground lead adds inductance, and a probe with too little bandwidth can hide fast changes.
Start with the expected signal and the event that causes trouble. A capture taken during a failing boot or under load is often more informative than a clean trace from an idle board.
