Question
Why is the KNX RF free-field range limited to approximately 100 m?
Answer
A — Because of the maximum allowed transmission power and the limited energy available in battery-operated or battery-free devices
Correct: the source names transmission-power limits and the limited energy of battery/battery-free devices.
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An error or unclear wording? Report this questionAll proposed choices (exam context)
- A.Because of the maximum allowed transmission power and the limited energy available in battery-operated or battery-free devices✓
- B.Because the 868 MHz band physically cannot travel further
- C.Because ETS caps the transmission distance at 100 m
- D.Because encryption of telegrams shortens the range
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