Digital Oscilloscopes

Digital oscilloscopes in this range are benchtop instruments from entry-level two-channel units through to mixed-signal scopes with protocol decoding and deep memory.

Keysight, Tektronix, Teledyne LeCroy, RIGOL, Siglent and Instek cover the range. Bandwidth is the specification everyone quotes, but it is a rule of thumb rather than a limit: to capture an edge without visible rounding you generally want bandwidth around five times the fastest significant frequency in the signal, not merely equal to it. Sample rate and record length together set how long a window you can capture at full resolution, which is what matters when hunting an intermittent fault. Channel count, and whether you need digital channels alongside the analog ones, usually decides between otherwise similar models. Remember that the probe is part of the measurement, so a scope specified at 200 MHz fitted with a 100 MHz probe is a 100 MHz instrument. Tell us the signal and the fastest edge you need to resolve.