Which of the following provide digital voice modes?
The correct answer is D: DMR, D-STAR, and SystemFusion. Digital voice modes include: DMR, D-STAR, and SystemFusion. These are the three main digital voice modes used in amateur radio. For amateur radio operators, this is important for digital voice operation. Understanding this helps when selecting digital voice equipment.
Exam Tip
Digital voice modes = DMR, D-STAR, SystemFusion. Think 'D'igital 'V'oice = 'D'MR, 'D'-STAR, 'S'ystemFusion. These are the three main digital voice modes. Not WSPR/MFSK16/EasyPAL (beacon/data/TV), not FT8/FT4/FST4 (data), not Winlink/PACTOR (data) - just DMR, D-STAR, SystemFusion.
Memory Aid
"Digital voice modes = DMR, D-STAR, SystemFusion. Think 'D'igital 'V'oice = 'D'MR, 'D'-STAR, 'S'ystemFusion. These are the three main digital voice modes used in amateur radio. Standard digital voice modes."
Real-World Application
Digital voice modes: DMR (Digital Mobile Radio), D-STAR (Digital Smart Technologies for Amateur Radio), and SystemFusion (Yaesu's digital voice mode). These are the three main digital voice modes used in amateur radio. They provide digital voice communication with features like error correction and digital features.
Key Concepts
Why Other Options Are Wrong
Option A: Incorrect. WSPR, MFSK16, and EasyPAL are not digital voice modes - WSPR is a beacon, MFSK16 is data, EasyPAL is slow-scan TV. Not voice modes.
Option B: Incorrect. FT8, FT4, and FST4 are data modes, not digital voice - they're weak-signal data modes. Not voice modes.
Option C: Incorrect. Winlink, PACTOR II, and PACTOR III are data modes, not digital voice - they're packet/data modes. Not voice modes.
题目解析
The correct answer is D: DMR, D-STAR, and SystemFusion. Digital voice modes include: DMR, D-STAR, and SystemFusion. These are the three main digital voice modes used in amateur radio. For amateur radio operators, this is important for digital voice operation. Understanding this helps when selecting digital voice equipment.
考试技巧
Digital voice modes = DMR, D-STAR, SystemFusion. Think 'D'igital 'V'oice = 'D'MR, 'D'-STAR, 'S'ystemFusion. These are the three main digital voice modes. Not WSPR/MFSK16/EasyPAL (beacon/data/TV), not FT8/FT4/FST4 (data), not Winlink/PACTOR (data) - just DMR, D-STAR, SystemFusion.
记忆口诀
Digital voice modes = DMR, D-STAR, SystemFusion. Think 'D'igital 'V'oice = 'D'MR, 'D'-STAR, 'S'ystemFusion. These are the three main digital voice modes used in amateur radio. Standard digital voice modes.
实际应用示例
Digital voice modes: DMR (Digital Mobile Radio), D-STAR (Digital Smart Technologies for Amateur Radio), and SystemFusion (Yaesu's digital voice mode). These are the three main digital voice modes used in amateur radio. They provide digital voice communication with features like error correction and digital features.
错误选项分析
Option A: Incorrect. WSPR, MFSK16, and EasyPAL are not digital voice modes - WSPR is a beacon, MFSK16 is data, EasyPAL is slow-scan TV. Not voice modes. Option B: Incorrect. FT8, FT4, and FST4 are data modes, not digital voice - they're weak-signal data modes. Not voice modes. Option C: Incorrect. Winlink, PACTOR II, and PACTOR III are data modes, not digital voice - they're packet/data modes. Not voice modes.
知识点
Digital voice modes, DMR, D-STAR, SystemFusion
Verified Content
Question from official FCC General Class question pool. Explanation reviewed by licensed amateur radio operators.