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<< Contents
<< Workbar
<< Setup ToolBar
<< Sample Mode
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Serial buses are defined in the Serial Tab.
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Normal Timing or Transitional Timing modes can capture raw signals from a serial bus. These raw signals can then be converted to parallel format and displayed in the software.
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However, Normal and Transitional Timing modes cannot trigger on formatted serial bus values. Triggering on serial bus values requires special trigger features.
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Serial Bus Trigger mode is basically Transitional Timing with special trigger resources.
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While several different serial buses can be captured together, only one bus can trigger the logic analyzer.
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Choose the best sample rate to capture your serial bus signals.
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Oversample the serial bus signals at least 10X to 50X for best triggering results.
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For example, a 1 MHz clock signal should be oversampled at 10 MHz to 50 MHz.
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No samples are wasted by this large oversampling because Transitional Timing mode is used.
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Higher oversampling rates improve trace resolution, which produces the most accurate triggering and serial bus conversion.
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However, a slower sampling rate may be required if the serial bus signals are noisy or have a relatively slow rise / fall time specification.
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A minimal 5X to 10X oversampling rates can often reject undesirable noise which interferes with triggering and serial conversion.
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Copyright and trademark information
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