Which type of code is used for sending characters in a PSK31 signal?
The correct answer is A: Varicode. The type of code used for sending characters in a PSK31 signal is Varicode. Varicode is a variable-length code that assigns shorter codes to common characters. For amateur radio operators, this is how PSK31 encodes characters. Understanding this helps when operating PSK31.
Exam Tip
PSK31 character code = Varicode. Think 'P'SK31 = 'V'aricode. Varicode is a variable-length code that assigns shorter codes to common characters. Not Viterbi (error correction), not volumetric, not just binary - just Varicode.
Memory Aid
"PSK31 character code = Varicode. Think 'P'SK31 = 'V'aricode. Varicode is a variable-length code that assigns shorter codes to common characters. Standard PSK31 character encoding."
Real-World Application
PSK31 uses Varicode: Common characters like 'e' and space get short codes, less common characters get longer codes. This makes PSK31 efficient - common text transmits faster. Varicode is specifically designed for PSK31 - it's the character encoding used. This is how PSK31 encodes characters.
Key Concepts
Why Other Options Are Wrong
Option B (Viterbi): Incorrect. Viterbi is an error correction algorithm, not a character code - PSK31 uses Varicode, not Viterbi. Viterbi is different.
Option C (Volumetric): Incorrect. Volumetric isn't a code type - PSK31 uses Varicode. Volumetric isn't a real code.
Option D (Binary): Incorrect. Binary is too general - PSK31 uses Varicode (a specific variable-length binary code), not just binary. Varicode is the specific code.
题目解析
The correct answer is A: Varicode. The type of code used for sending characters in a PSK31 signal is Varicode. Varicode is a variable-length code that assigns shorter codes to common characters. For amateur radio operators, this is how PSK31 encodes characters. Understanding this helps when operating PSK31.
考试技巧
PSK31 character code = Varicode. Think 'P'SK31 = 'V'aricode. Varicode is a variable-length code that assigns shorter codes to common characters. Not Viterbi (error correction), not volumetric, not just binary - just Varicode.
记忆口诀
PSK31 character code = Varicode. Think 'P'SK31 = 'V'aricode. Varicode is a variable-length code that assigns shorter codes to common characters. Standard PSK31 character encoding.
实际应用示例
PSK31 uses Varicode: Common characters like 'e' and space get short codes, less common characters get longer codes. This makes PSK31 efficient - common text transmits faster. Varicode is specifically designed for PSK31 - it's the character encoding used. This is how PSK31 encodes characters.
错误选项分析
Option B (Viterbi): Incorrect. Viterbi is an error correction algorithm, not a character code - PSK31 uses Varicode, not Viterbi. Viterbi is different. Option C (Volumetric): Incorrect. Volumetric isn't a code type - PSK31 uses Varicode. Volumetric isn't a real code. Option D (Binary): Incorrect. Binary is too general - PSK31 uses Varicode (a specific variable-length binary code), not just binary. Varicode is the specific code.
知识点
PSK31, Varicode, Character encoding, Variable-length code
Verified Content
Question from official FCC General Class question pool. Explanation reviewed by licensed amateur radio operators.