Rohde & Schwarz scopes analyze automotive CXPI interfaces
Munich, Germany. Rohde & Schwarz has expanded the functionality of its R&S RTE and R&S RTO digital oscilloscopes to include a triggering and decoding option for the new clock extension peripheral interface (CXPI) protocol. This newly developed automotive bus is a cost-effective alternative to the LIN protocol.
The company said its new R&S RTx-K76 CXPI serial triggering and decoding option allows users to analyze the communications bus with R&S RTE and R&S RTO oscilloscopes. Users can decode all protocol details and isolate anomalies by triggering on the corresponding details.
CXPI was standardized in 2015 under SAE J3076 as a communications bus for diverse automotive applications. The bus uses pulse-width modulation to transmit data over a single wire at 20 kb/s. The characters used are based on UART.
When debugging CXPI interfaces during development, users can trigger on conditions such as start of frame, frame ID, data values, and various error conditions. The instrument’s search and navigation functions make it easy to detect relevant events in the CXPI data stream. The oscilloscope displays decoded telegrams as color-coded bus signals in a waveform diagram or as a table. As a result, developers can verify the quality of their products early during development.
The R&S RTE and R&S RTO let users simultaneously decode up to four serial buses from analog or logic signals. The oscilloscopes also deliver fast eye-diagram mask tests using the standard mask test functionality.
