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Application Notes
Introduction
An oscilloscope has an inherent ability to characterize the analog quality of automotive serial buses such as CAN, CAN FD, LIN, SENT, PSI5, CXPI, and FlexRay. That is why engineers often use oscilloscopes to debug and characterize these signals. Performing analog characterization using an oscilloscope is known as taking physical-layer measurements. Serial bus protocol analyzers optimally perform measurements at the application layer. These instruments focus on providing trace flow of data at a higher abstraction level — but with little or no physical-layer measurement capability. A scope is not a replacement for a serial bus protocol analyzer. Engineers working on automotive serial bus applications typically have both. Many oscilloscopes on the market offer automotive-focused options. However, Keysight InfiniiVision Series oscilloscopes offer unique measurement capabilities for debugging and characterizing the physical layer of automotive serial buses.
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