Which of the following is true of SITOR...

Question 1 / 2707066YwnkOS15gsBaNIuHFx

Question 1 of 2707066YwnkOS15gsBaNIuHFx

Which of the following is true of SITOR (NBDP) Mode B (FEC), in the presence of static crashes.

Question 1 of 27070

Which of the following is true of SITOR (NBDP) Mode B (FEC), in the presence of static crashes.

🔍 Key Concepts

• SITOR / NBDP operating modes (difference between ARQ Mode A and FEC Mode B) • What Forward Error Correction (FEC) is designed to do in a noisy HF radio environment • Effect of static crashes and noise on character reception and how redundancy helps

💭 Think About

• Ask yourself: in FEC mode, does the receiver need to talk back to the transmitter, or does the transmitter add protection in another way? • Think about how sending information more than once can help when some characters are distorted by static crashes. • Consider which option actually describes an error-correction feature, and which are unrelated side effects or limitations.

✅ Before You Answer

• Verify which SITOR mode uses repeat transmission of characters to combat errors without needing acknowledgements (ARQ). • Check if FEC is intended to reduce the error rate or if it affects things like flow rate, synchronization, or idle characters instead. • Make sure the statement you choose directly relates to how FEC works in noise/static, not just a general radio behavior.

Question 1 of 27070

Which of the following is true of SITOR (NBDP) Mode B (FEC), in the presence of static crashes.

Data flow rate depends on signal propagation.

Idle characters are sent upon request.

Transmitter and receiver cannot synchronize.

FEC reduces the error rate by transmitting each character twice .

Question 1 / 2707066YwnkOS15gsBaNIuHFx

Question 1 of 2707066YwnkOS15gsBaNIuHFx

Which of the following is true of SITOR (NBDP) Mode B (FEC), in the presence of static crashes.

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Question 1 of 27070

Which of the following is true of SITOR (NBDP) Mode B (FEC), in the presence of static crashes.