Which is the code used for SITOR-A and -B...

Question 1 / 27070gg8FcwDyl8svS53CghSr

Question 1 of 27070gg8FcwDyl8svS53CghSr

Which is the code used for SITOR-A and -B transmissions?

Question 1 of 27070

Which is the code used for SITOR-A and -B transmissions?

🔍 Key Concepts

• SITOR (Simplex Teletype Over Radio) character structure • Difference between Baudot code and error‑detecting / error‑correcting codes • How many bits are used in typical ARQ (Automatic Repeat reQuest) systems for redundancy

💭 Think About

• First, recall what kind of service SITOR-A and SITOR-B provide and why error detection is important there. • Think about whether SITOR uses an older teleprinter code directly, or whether it modifies the characters to help the receiver detect errors. • Compare the answer choices: which ones describe a fixed pattern of zeros and ones per character, and which one just describes raw data bits plus extra bits?

✅ Before You Answer

• Check whether SITOR characters are designed so every character has the same number of “ones” and “zeros”. • Verify if SITOR uses a constant-weight, 7-bit code derived from but not identical to standard Baudot. • Confirm whether SITOR’s error detection is achieved by the pattern of bits in each character rather than by adding extra separate parity bits.

Question 1 of 27070

Which is the code used for SITOR-A and -B transmissions?

The 5 bit baudot telex code.

Each character consists of 7 bits with 3 “zeros” and 4 “ones”.

Each character consists of 7 bits with 4 “zeros” and 3 “ones”.

Each character has 7 bits of data and 3 bits for error correction.

Question 1 / 27070gg8FcwDyl8svS53CghSr

Question 1 of 27070gg8FcwDyl8svS53CghSr

Which is the code used for SITOR-A and -B transmissions?

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Question 1 of 27070

Which is the code used for SITOR-A and -B transmissions?