The immunity to RF interference of a CAN system

A Rover 820Si equipped with a controller area network (CAN) was tested for radio frequency susceptibilities in the EMC chamber at Rover Gaydon Test Centre. The car was configured in turn with two different types of twisted pair wire and a flat pair for the CAN data bus. Each type of wire was tested in the chamber at a range of frequencies and with various antenna positions. The CAN data was collected and stored on a commercially available PC based network analyzer for later analysis. The author describes the method of preparation and testing of this vehicle, with an overview of the results of this test which are very encouraging for the future of CAN.<
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