13 FlexRay Triggering and Serial Decode
316 InfiniiVision 7000B Series Oscilloscopes User’s Guide
• NOT Sync Frames
6 Press the Cyc Ct Rep softkey, and use the Entry knob to select the cycle
count repetition factor (2, 4, 8, 16, 32, or 64, or All).
7 Press the Cyc Ct Bas softkey, and use the Entry knob to select the cycle
count base factor from 0 through the Cyc Ct Rep factor minus 1.
For example, with a base factor of 1 and a repetition factor of 16, the
oscilloscope triggers on cycles 1, 17, 33, 49, and 65.
To trigger on a particular cycle, set the Cycle Repetition factor to 64
and use the cycle base factor to choose a cycle.
To trigger all (any) cycles, set the Cycle Repetition factor to All. The
scope will trigger on any and all cycles.
Triggering on FlexRay Errors
1 Press [Trigger]; then, select the FlexRay trigger type.
2 In the Trigger Menu press Trigger; then, select Error.
3 Press the Errors softkey; then, select the error type:
• All Errors
• Header CRC Error — cyclic redundancy check error in the header.
• Frame CRC Error — cyclic redundancy check error in the frame.
Because specific FlexRay frames may occur infrequently, it may be helpful to set the
oscilloscope to Normal trigger mode instead of Auto trigger mode. This prevents the
oscilloscope from Auto triggering while waiting for a particular frame and cycle
combination.
Since FlexRay errors occur infrequently it may be helpful to set the oscilloscope to Normal
trigger mode instead of Auto trigger mode. This prevents the oscilloscope from Auto
triggering while waiting for an error to occur. You may need to adjust trigger holdoff to see a
particular error when multiple errors exist.
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