Why a 50 MHz Oscilloscope Misses CAN Bus Glitches (and What a 100 MHz Scope Reveals)
In March, a North American commercial vehicle ECU supplier sent us a 42-second capture. The bus ran 500 kbit/s J1939, twelve nodes, 8.2 meters of twisted pair, with 120 Ω termination at both ends. By the time we saw it, the customer had already replaced two transceivers and rewritten the driver. The 50 MHz oscilloscope […]