Question
Which modulation process is used in the KNX RF system?
Answer
C — Frequency Shift Keying (FSK), a form of frequency modulation
Correct: KNX RF uses FSK; the '0' and '1' states are generated by a slight deviation in the carrier (middle) frequency.
Source
KNX Basic Course Documentation — 3.1 — p. 142
All proposed choices (exam context)
- A.Pulse-width modulation
- B.Amplitude Shift Keying (amplitude modulation)
- C.Frequency Shift Keying (FSK), a form of frequency modulation✓
- D.Phase Shift Keying (phase modulation)
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