What is the effect of chordal-hop propagation?
The correct answer is A: The signal experiences less loss compared to multi-hop propagation, which uses Earth as a reflector. What is the effect of chordal-hop propagation is that the signal experiences less loss compared to multi-hop propagation, which uses Earth as a reflector. Chordal-hop skips ground reflections, reducing loss. For amateur radio operators, this is important for understanding propagation efficiency. Understanding this helps when operating HF.
Exam Tip
Chordal-hop effect = signal experiences less loss compared to multi-hop using Earth as reflector. Think 'C'hordal-'H'op = 'C'uts 'H'op losses (skips ground). Chordal-hop skips ground reflections, reducing loss. Not lower MUF, not noise reduction, not faster travel - just less loss.
Memory Aid
"Chordal-hop effect = signal experiences less loss compared to multi-hop using Earth as reflector. Think 'C'hordal-'H'op = 'L'ess 'L'oss. Chordal-hop skips ground reflections, reducing loss. Important for understanding propagation efficiency."
Real-World Application
Chordal-hop propagation: The signal experiences less loss compared to multi-hop propagation that uses Earth as a reflector. In chordal-hop, the signal bounces between ionospheric layers without hitting the ground, avoiding ground losses. This is the effect - less loss compared to multi-hop with ground reflections.
Key Concepts
Why Other Options Are Wrong
Option B: Incorrect. MUF for chordal-hop isn't much lower - chordal-hop has less loss, not lower MUF. Lower MUF isn't the effect.
Option C: Incorrect. Atmospheric noise isn't reduced - chordal-hop has less loss, not noise reduction. Noise reduction isn't the effect.
Option D: Incorrect. Signals don't travel faster - chordal-hop has less loss, not faster travel. Faster travel isn't the effect.
题目解析
The correct answer is A: The signal experiences less loss compared to multi-hop propagation, which uses Earth as a reflector. What is the effect of chordal-hop propagation is that the signal experiences less loss compared to multi-hop propagation, which uses Earth as a reflector. Chordal-hop skips ground reflections, reducing loss. For amateur radio operators, this is important for understanding propagation efficiency. Understanding this helps when operating HF.
考试技巧
Chordal-hop effect = signal experiences less loss compared to multi-hop using Earth as reflector. Think 'C'hordal-'H'op = 'C'uts 'H'op losses (skips ground). Chordal-hop skips ground reflections, reducing loss. Not lower MUF, not noise reduction, not faster travel - just less loss.
记忆口诀
Chordal-hop effect = signal experiences less loss compared to multi-hop using Earth as reflector. Think 'C'hordal-'H'op = 'L'ess 'L'oss. Chordal-hop skips ground reflections, reducing loss. Important for understanding propagation efficiency.
实际应用示例
Chordal-hop propagation: The signal experiences less loss compared to multi-hop propagation that uses Earth as a reflector. In chordal-hop, the signal bounces between ionospheric layers without hitting the ground, avoiding ground losses. This is the effect - less loss compared to multi-hop with ground reflections.
错误选项分析
Option B: Incorrect. MUF for chordal-hop isn't much lower - chordal-hop has less loss, not lower MUF. Lower MUF isn't the effect. Option C: Incorrect. Atmospheric noise isn't reduced - chordal-hop has less loss, not noise reduction. Noise reduction isn't the effect. Option D: Incorrect. Signals don't travel faster - chordal-hop has less loss, not faster travel. Faster travel isn't the effect.
知识点
Chordal-hop propagation, Less loss, Multi-hop propagation, Earth as reflector
Verified Content
Question from official FCC Extra Class question pool. Explanation reviewed by licensed amateur radio operators.