Question
How does a bidirectional KNX RF device access the bus?
Answer
D — It checks whether the channel is free; if it is occupied it waits until free, then transmits
Correct: bidirectional devices listen first and only send once the channel is free.
Start 10 free questions
Free · No account · No payment card
An error or unclear wording? Report this questionAll proposed choices (exam context)
- A.It transmits immediately regardless of channel state
- B.It transmits continuously until an acknowledgement arrives
- C.It can only receive and never transmits
- D.It checks whether the channel is free; if it is occupied it waits until free, then transmits✓
Full bank
Keep going with the full KNX Basic bank
Keep going with the full KNX Basic bank: unlimited timed mock exams, detailed answers, history. From €9 (one-time payment).
See pricing — from €9 →Want more?
Continue KNX Basic practice
Related questions
- In the KNX RF system, 868.30 MHz is used as the middle (centre) frequency.KNX RF (Radio)
- What bit rate does the KNX RF description give for the information to be transferred?KNX RF (Radio)
- What is the stated advantage of the Manchester coding used in KNX RF?KNX RF (Radio)
- What is the maximum transmission power in the KNX RF (single-channel) system?KNX RF (Radio)
- The KNX RF duty cycle limits how long a device may transmit. What is that limit?KNX RF (Radio)