High speed digitisers are instruments designed to capture rapidly changing electrical signals using analogue-to-digital converters (ADCs), storing the digitised waveform data in high-speed memory. These instruments are typically multi-channel, allowing users to compare multiple signals at once. While similar in function to digital oscilloscopes, digitisers often focus on narrower measurement ranges or feature adjustable amplifiers to accommodate a wider variety of signal levels.

They are equipped with high-speed communications interfaces—such as TekHSI—for fast data transfer to an external computer for analysis.

High speed digitisers are frequently used in combination to build larger systems. They come in rack-mounted formats as well as PXI, AXI, or other modular mainframe acquisition platforms.

Common applications include automated testing and scientific research, particularly in high energy physics, where signal integrity and dependable performance are essential.

These low profile digitizers are essentially full-featured oscilloscopes in a compact 2U “rack ready” form factor. They offer the same graphical user interface and performance as bench instruments but in a much smaller package.