Buy - Used Oscilloscope

Deeper memory allows you to capture longer time windows while maintaining a high sample rate, which is crucial for finding intermittent glitches.

If buying locally, perform these checks to verify functionality:

Test all knobs and buttons. Rotary encoders (the knobs on DSOs) are common failure points; ensure they don't skip or lag. buy used oscilloscope

This determines the highest frequency signal you can measure. For general hobbyist work, aim for at least 50–100 MHz .

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. Deeper memory allows you to capture longer time

When looking for a used unit, prioritize these specifications based on your needs:

Check for dead pixels on LCDs or "screen burn" on older analog CRT displays. Top Used Models for Hobbyists (2026) Based on current market availability and community favor: This determines the highest frequency signal you can measure

Look for a rate at least 2.5 to 10 times your bandwidth for accurate waveform representation.