Feature

Not all oscilloscopes are created equal: Why ADC and low noise floor matter

In engineering, precision is paramount. Whether it’s performing quality assurance on cutting-edge electronics or debugging complex systems, the accuracy of measurements can make or break a project.

05/11/2024 10:14:55

This is where the concept of vertical accuracy in oscilloscopes, which refers to how closely the voltage readings match the actual voltage of the signal being measured, becomes crucial. Achieving high vertical accuracy depends on two factors: the number of analogue-to-digital converter (ADC) bits and the noise floor of the oscilloscope.

The role of ADC bits
The horizontal axis of an oscilloscope represents the time base (seconds per division, or s/div), while the vertical axis shows the voltage (volts per division, or V/div). Vertical accuracy is about how accurately the oscilloscope displays the voltage of the signal, which is vital for visual representation and precise measurements. The closer the voltage reading on the oscilloscope screen is to the actual signal voltage, the higher the vertical accuracy.

To achieve the optimal reading, engineers need oscilloscopes with the highest number of ADC bits and the lowest noise floor.

Read the full article in DPA's November 2024 issue

Written By Sophia Bell

Sophia Bell is the Group Editor of DPA, Connectivity, and PBSI. She joined the team in 2020 as Assistant Editor after achieving a First-Class Honours BA in English Literature and Film Studies from the University of East Anglia. In her current role, she leads the editorial strategy, driving digital growth and ensuring each title continues to deliver trusted, relevant insight for engineering and manufacturing professionals.