What are some of the differences between the Baudot digital code and ASCII?
The correct answer is B: Baudot uses 5 data bits per character, ASCII uses 7 or 8; Baudot uses 2 characters as letters/figures shift codes, ASCII has no letters/figures shift code. Key differences between Baudot and ASCII are: Baudot uses 5 data bits per character (allowing 32 possible characters), while ASCII uses 7 or 8 bits (allowing 128 or 256 characters). Baudot uses 2 characters as letters/figures shift codes to switch between letter and figure modes, while ASCII has no letters/figures shift code - it can represent both letters and figures simultaneously.
Baudot is an older 5-bit code that requires shift codes to access the full character set (letters vs figures). ASCII is a more modern code that can represent all characters (letters, numbers, symbols) without shift codes. ASCII is more flexible but requires more bits per character. Baudot's 5-bit structure makes it more bandwidth-efficient but less capable than ASCII.
Exam Tip
Baudot vs ASCII = 5 bits vs 7/8 bits, shift codes vs no shift codes. Remember: Baudot uses 5 bits with 2 shift codes; ASCII uses 7/8 bits with no shift codes.
Memory Aid
"**B**audot = **5** bits + **2** shift codes; **A**SCII = **7**/**8** bits, **0** shift codes (think 'B = 5+2, A = 7/8+0')"
Real-World Application
You're using Baudot code (5 bits per character) for RTTY. To send 'A1', you send a letters shift code, then 'A', then a figures shift code, then '1'. With ASCII (7 or 8 bits), you can send 'A' and '1' directly without shift codes because ASCII can represent both letters and numbers simultaneously.
FCC Part 97.3Key Concepts
Why Other Options Are Wrong
Option A: Incorrect. Baudot uses 5 bits, not 4 bits. And Baudot uses 2 shift codes (letters and figures), not 1.
Option C: Incorrect. Baudot uses 5 bits, not 6 bits. And Baudot does use letters/figures shift codes - ASCII doesn't.
Option D: Incorrect. Baudot uses 5 bits, not 7 bits. And Baudot does use shift codes, while ASCII doesn't.
题目解析
The correct answer is B: Baudot uses 5 data bits per character, ASCII uses 7 or 8; Baudot uses 2 characters as letters/figures shift codes, ASCII has no letters/figures shift code. Key differences between Baudot and ASCII are: Baudot uses 5 data bits per character (allowing 32 possible characters), while ASCII uses 7 or 8 bits (allowing 128 or 256 characters). Baudot uses 2 characters as letters/figures shift codes to switch between letter and figure modes, while ASCII has no letters/figures shift code - it can represent both letters and figures simultaneously. Baudot is an older 5-bit code that requires shift codes to access the full character set (letters vs figures). ASCII is a more modern code that can represent all characters (letters, numbers, symbols) without shift codes. ASCII is more flexible but requires more bits per character. Baudot's 5-bit structure makes it more bandwidth-efficient but less capable than ASCII.
考试技巧
Baudot vs ASCII = 5 bits vs 7/8 bits, shift codes vs no shift codes. Remember: Baudot uses 5 bits with 2 shift codes; ASCII uses 7/8 bits with no shift codes.
记忆口诀
**B**audot = **5** bits + **2** shift codes; **A**SCII = **7**/**8** bits, **0** shift codes (think 'B = 5+2, A = 7/8+0')
实际应用示例
You're using Baudot code (5 bits per character) for RTTY. To send 'A1', you send a letters shift code, then 'A', then a figures shift code, then '1'. With ASCII (7 or 8 bits), you can send 'A' and '1' directly without shift codes because ASCII can represent both letters and numbers simultaneously.
错误选项分析
Option A: Incorrect. Baudot uses 5 bits, not 4 bits. And Baudot uses 2 shift codes (letters and figures), not 1. Option C: Incorrect. Baudot uses 5 bits, not 6 bits. And Baudot does use letters/figures shift codes - ASCII doesn't. Option D: Incorrect. Baudot uses 5 bits, not 7 bits. And Baudot does use shift codes, while ASCII doesn't.
知识点
Baudot code, ASCII, Digital codes, Shift codes
Verified Content
Question from official FCC Extra Class question pool. Explanation reviewed by licensed amateur radio operators.