Which of the following statements is true of VOX operation versus PTT operation?
The correct answer is B: It allows 'hands free' operation. An advantage of VOX operation versus PTT operation is that it allows 'hands free' operation. VOX (Voice Operated Transmit) automatically switches to transmit when you speak, so you don't need to press a PTT button. For amateur radio operators, this is convenient for operating while doing other tasks. Understanding this helps when choosing between VOX and PTT operation.
Exam Tip
VOX advantage = hands-free operation. Think 'V'OX = 'V'oice 'O'perated e'X'change (hands-free). Automatically switches to transmit when you speak. Not about audio quality, bandwidth, or power - just convenience.
Memory Aid
"VOX advantage = hands-free operation. Think 'V'OX = 'V'oice 'O'perated e'X'change. Automatically switches to transmit when you speak, allowing hands-free operation. Main advantage over PTT."
Real-World Application
You're operating while working on your antenna. With VOX, you can talk without pressing PTT - the radio automatically switches to transmit when you speak. This hands-free operation is convenient when you need your hands for other tasks. PTT requires you to press a button each time you transmit.
Key Concepts
Why Other Options Are Wrong
Option A: Incorrect. VOX doesn't make received signals sound more natural - received audio quality is the same. VOX affects transmit switching, not receive quality.
Option C: Incorrect. VOX doesn't use less bandwidth - bandwidth is determined by the mode (SSB, FM, etc.), not by VOX vs PTT. Both use the same bandwidth.
Option D: Incorrect. VOX doesn't provide more power output - power is determined by the transmitter, not by VOX vs PTT. Both can use the same power.
题目解析
The correct answer is B: It allows 'hands free' operation. An advantage of VOX operation versus PTT operation is that it allows 'hands free' operation. VOX (Voice Operated Transmit) automatically switches to transmit when you speak, so you don't need to press a PTT button. For amateur radio operators, this is convenient for operating while doing other tasks. Understanding this helps when choosing between VOX and PTT operation.
考试技巧
VOX advantage = hands-free operation. Think 'V'OX = 'V'oice 'O'perated e'X'change (hands-free). Automatically switches to transmit when you speak. Not about audio quality, bandwidth, or power - just convenience.
记忆口诀
VOX advantage = hands-free operation. Think 'V'OX = 'V'oice 'O'perated e'X'change. Automatically switches to transmit when you speak, allowing hands-free operation. Main advantage over PTT.
实际应用示例
You're operating while working on your antenna. With VOX, you can talk without pressing PTT - the radio automatically switches to transmit when you speak. This hands-free operation is convenient when you need your hands for other tasks. PTT requires you to press a button each time you transmit.
错误选项分析
Option A: Incorrect. VOX doesn't make received signals sound more natural - received audio quality is the same. VOX affects transmit switching, not receive quality. Option C: Incorrect. VOX doesn't use less bandwidth - bandwidth is determined by the mode (SSB, FM, etc.), not by VOX vs PTT. Both use the same bandwidth. Option D: Incorrect. VOX doesn't provide more power output - power is determined by the transmitter, not by VOX vs PTT. Both can use the same power.
知识点
VOX operation, Hands-free operation, PTT vs VOX, Operating convenience
Verified Content
Question from official FCC General Class question pool. Explanation reviewed by licensed amateur radio operators.