Buy Used Oscilloscope (SIMPLE METHOD)

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

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

Look for a rate at least 2.5 to 10 times your bandwidth for accurate waveform representation. This determines the highest frequency signal you can measure