An oscilloscope is an instrument that displays how a voltage changes over time, plotted as a waveform on a screen. Instead of a single number the way a multimeter gives you, it shows the shape of a signal: its amplitude, its timing, its noise, its glitches, and how it interacts with other signals captured on additional channels. It is the instrument most electronics engineers say they cannot work without.
Key specifications to consider
- Bandwidth: the highest frequency the oscilloscope can faithfully capture. Set it too low, and fast edges get rounded off.
- Sample rate: how many data points per second the oscilloscope digitises. Higher rates reconstruct fast transients more accurately.
- Memory depth: how long a capture can be recorded at full sample rate before the oscilloscope has to slow down.
- Number of channels: two or four analog channels cover most bench work, more for complex power or digital debugging.
- Triggering and decoding: the ability to isolate a single event or serial bus transaction out of a continuous signal.
Typical applications
Oscilloscopes show up everywhere a signal needs to be understood visually: power supply ripple and switching transients, digital bus signal integrity, automotive sensor debugging, RF envelope analysis, and general electronics troubleshooting in R&D, production test, and education.
Oscilloscopes from ALLdata
Rigol's oscilloscope range covers everything from entry-level bench work to high-bandwidth «signal integrity» analysis: the compact Rigol DHO900, the flagship Rigol MHO900 mixed-domain series, and the high-bandwidth Rigol DS9000 series for the most demanding signal integrity work.
Not sure which bandwidth or memory depth your application actually needs? Talk to an ALLdata engineer.