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DSOX4CXPI Datasheet(PDF) 3 Page - Keysight Technologies |
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DSOX4CXPI Datasheet(HTML) 3 Page - Keysight Technologies |
3 / 26 page 03 | Keysight | Serial Bus Options for InfiniiVision X-Series Oscilloscopes - Data Sheet Figure 1. Hardware-based decoding quickly reveals serial communication errors. Figure 3. Automatic “Search & Navigation” quickly finds user- specified serial bus frames/bytes of interest. Figure 2. Symbolically decoding the CAN bus. Hardware-Based Decoding Keysight’s InfiniiVision Series oscilloscopes are the industry’s only Keysight’s InfiniiVision Series oscilloscopes are the industry’s only scopes to use hardware-based decoding. Most other vendor’s scopes with serial bus triggering and protocol decode, use software post-processing techniques to decode serial packets/ frames. With these software techniques, waveform- and decode- update rates tend to be slow (sometimes seconds per update.) That’s especially true when using deep memory, which is often required to capture multiple packetized serial bus signals. And when analyzing multiple serial buses simultaneously, software techniques can make decode update rates even slower. Faster decoding with hardware-based technology enhances scope usability, and more importantly, the probability of capturing infrequent serial communication errors. Figure 1 shows an example of a Keysight InfiniiVision X-Series scope capturing a random and infrequent CAN error frame. The upper half of the scope’s display shows the decoded data in a “Lister” format, along with a time-correlated decode trace shown below the waveform. Symbolic Trigger and Decode With the DSOXT3AUTO, DSOX4AUTO or DSOX6AUTO option licensed on a 3000T, 4000 or 6000 X-Series oscilloscope, you can import a .dbc file that defines your multi-node CAN network. The oscilloscope can then trigger on and decode the CAN bus symbolically as shown in Figure 2. LIN symbolic trigger and decode is also supported on the 3000T, 4000, and 6000 X-Series oscilloscopes by importing an industry-standard .ldf file. Automatic Search and Navigation After capturing a long record of serial bus communication using the InfiniiVision scope’s MegaZoom deep memory, you can easily perform a search operation based on specific criteria that you enter. Then, you can quickly navigate to bytes/frames of serial data that satisfy the entered search criteria. Figure 3 shows an example of searching on captured I2C data to find all occurrences of Read or Write operations with “No Ack.” In this case, the scope found five occurrences of data transfers with “No Ack,” and marked each occurrence with a white triangle to show where in time they happened relative to the captured waveform. Navigating and zooming-in on each marked byte/frame is quick and easy using the scope’s front panel navigation keys. Search and Navigation not available for DSOXT3CXPI/DSOX4CXPI. |
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