Deeper memory allows you to capture longer time windows while maintaining a high sample rate, which is crucial for finding intermittent glitches.
Buying a used oscilloscope can save you hundreds of dollars, but it requires careful testing to ensure you aren't inheriting someone else's "blown front end" or calibration nightmare. buy used oscilloscope
Most modern digital oscilloscopes (DSOs) run a self-test on startup; ensure it passes without error codes. Deeper memory allows you to capture longer time
Connect a probe to every channel and attach it to the built-in probe compensation output (usually a small metal tab on the front). You should see a clean, steady square wave. steady square wave. If buying locally
If buying locally, perform these checks to verify functionality: