KB0010: Creating a Summary Event Channel in AcqKnowledge

This solution describes how to combine several individual digital event channels into a summary event channel in AcqKnowledge for use in the MindWare analysis applications.

  1. Create a duplicate channel of one of the existing digital event channels and name it “Summary”
  2. Divide each existing digital event channel by 500 to reduce the pulse range to 0v – 0.1v
    • Select the channel
    • Go to Transform >> Waveform Math
    • Set Operand to “/”, Source 2 to “K”, and Constant to “500”
    • Press OK
    • Repeat for all remaining digital event channels
  3. For each digital event channel after the first digital event channel multiply by increasing powers of 2 (2, 4, 8, etc.)
    • Select the channel
    • Go to Transform >> Waveform Math
    • Set Operand to “*”, Source 2 to “K”, and Constant to “2^n” where n = the current digital channel
    • Press OK
    • Repeat for all remaining digital event channels
  4. Go to the newly created Summary event channel and add each of the original event channels to it
    • Select the Summary digital event channel
    • Go to Transform >> Waveform MathOther
    • Set Operand to “+”, Source 2 to the 1st digital event channel, and ensure that Destination is set to the Summary digital event channel
    • Press OK
    • Repeat for all remaining digital event channels
  5. Save your AcqKnowledge file
  6. In the MindWare analysis application map the Summary channel as “Event” for use in event-based analysis

To save time with future data acquisition, this channel can be created automatically by adding a summing equation to the data acquisition template.

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