Practice question

What is the difference between 'presence mode' and 'pulse mode' on a loop detector amplifier?

  1. There is no difference — they are the same mode
  2. Presence holds occupancy; pulse briefly reports entry
  3. Both modes are limited to pedestrian pushbuttons
  4. Presence mode works with video cameras; pulse mode works with inductive loops

Answer: B — Presence holds occupancy; pulse briefly reports entry

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