Oscilloscopes measure and display signal voltage over time, enabling engineers to observe waveform behavior, verify signal integrity, analyze timing relationships, and troubleshoot electrical issues. They are essential tools for validating the performance of electronic components, detecting anomalies such as noise or distortion, and ensuring compliance with design specifications.

Digitizers and oscilloscopes both convert analog signals to digital data, but their roles and features differ: Digitizers focus on high-speed, high-resolution data acquisition, often with deeper memory and software integration for automated test systems. Digitizers are ideal for capturing long-duration signals and processing data offline or in custom software environments such as LabVIEW. 

Modern software-defined oscilloscopes and digitizers can be evaluated across many parameters, including bandwidth, sampling rate, sampling modes, resolution and dynamic range, triggering, onboard memory, channel density, multiple instrument synchronization abilities, mixed signal capability, software, analysis options, and customizability. Understanding what will be tested and measured is critical to finding the right oscilloscope or digitizer.

NI PXI-based oscilloscopes and digitizers are modular instruments, making it easy to add them to existing test system architectures for applications requiring a high-channel count. Fast data transfer speeds, tight synchronization, integration with NI software such as LabVIEW, and robust support and technical resources are advantages of including NI oscilloscopes and digitizers within automated test systems.