How to Characterize Automotive Serial Buses

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Mixed Signal Oscilloscope
+ Mixed Signal Oscilloscope
Mixed Signal Oscilloscope
+ Mixed Signal Oscilloscope

Analyzing automotive serial buses with an oscilloscope

Analyzing automotive serial buses requires triggering and decoding on serial protocols, analyzing long time spans of signals, and capturing waveforms with elusive glitches. Test engineers need to analyze the captured data and decode it into meaningful symbols such as start and stop bits, addresses, data bytes, and acknowledged bits. This requires the use of an oscilloscope with serial protocol analysis, deep and segmented memory, and a fast waveform update rate. Serial protocol analysis with symbolic decoding is used so the oscilloscope can decode the captured data into meaningful symbols.

Automobiles use multiple buses for control and monitoring, including CAN, CAN FD, and LIN. Engineers need a time-interleaved lister to display multiple serial buses and correlate the data transfers from one to another. When analyzing the physical layer of the automotive serial buses, engineers do not want to miss out on the infrequent errors that could cause serious defects. Engineers need a fast waveform update rate to increase the probability of finding these glitches and deep and segmented memory to capture long time spans of signal data.

Automotive serial bus characterization solution

Characterizing automotive serial buses requires debugging buses to find infrequent signal glitches and correlate data transfers with other mixed-signal interactions. The Keysight InfiniiVision HD3 Series oscilloscope, paired with automotive analysis software, automatically triggers and decodes automotive serial buses, including CAN, CAN FD, CAN XL, and LIN. Use the 1.3 M waveforms per second update rate to quickly isolate signal glitches and 100 Mpts of memory to capture longer time spans of automotive serial data.
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