Test equipment
How to Choose an Oscilloscope: Bandwidth, Sample Rate and Channels
A practical oscilloscope and test equipment guide for makers, drone builders and electronics engineers.
· 3 min read
Key takeaways
- Bandwidth should be about 5× the fastest signal you measure.
- Sample rate should be several times the bandwidth.
- 4 channels help when debugging motor drivers and buses.
- A logic analyzer is better for many digital lines.
Bandwidth and sample rate
Bandwidth limits the frequencies the scope can show accurately. For microcontroller and drone electronics, 100–200MHz covers most work.
All-in-one benches
Compact 3-in-1 instruments combine a scope and multimeter — perfect for a small workbench.
Logic analyzers for digital buses
Debugging SPI, I2C, UART or ESC protocols across many lines is easier with a logic analyzer.
Signal generators
A function generator injects test signals so you can check filters, sensors and amplifiers.
Frequently asked questions
Products mentioned in this article
Test equipment
FNIRSI® DPOF1204 Analog 4CH 200MHz 1GSa/s Digital Phosphor Oscilloscope (US Plug)$623.75
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