How to Find Intermittent Errors on Automotive Serial Buses

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Essential Benchtop Oscilloscope
+ Essential Benchtop Oscilloscope
Essential Benchtop Oscilloscope
+ Essential Benchtop Oscilloscope

Capture Rare Bus Errors Faster

Finding intermittent errors on automotive serial buses requires capturing events that may occur only occasionally within otherwise normal bus traffic. The test setup needs an oscilloscope with a fast waveform update rate and hardware-based decoding so CAN, CAN FD, or LIN activity can be monitored without slowing acquisition enough to miss rare communication errors.

Engineers use the oscilloscope to capture and decode bus activity while looking for events such as error frames, form errors, acknowledge errors, cyclic redundancy check (CRC) errors, and bit-stuffing errors. Segmented memory can selectively capture consecutive error occurrences with precise time tagging, allowing engineers to review decoded frames individually and measure the timing between intermittent events.

Intermittent Serial Bus Error Debug Solution

Finding intermittent automotive serial bus errors requires an oscilloscope that can maintain fast acquisition while decoding protocol activity and selectively capture rare events for review. A Keysight Essential benchtop oscilloscope provides fast waveform updates and deep acquisition memory, while automotive analysis software provides automotive serial bus decoding and automated analysis. Hardware-based decoding keeps the protocol trace responsive as the oscilloscope captures CAN, CAN FD, and LIN activity. Segmented memory can then collect selected error occurrences with precise time tagging and automatic decoding, helping engineers isolate rare communication errors without searching through long records of normal bus traffic.
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