Which of the following is used to reduce or eliminate intermodulation interference in a repeater caused by a nearby transmitter?
The correct answer is B: A properly terminated circulator at the output of the repeater's transmitter. Which of the following is used to reduce or eliminate intermodulation interference in a repeater caused by a nearby transmitter is a properly terminated circulator at the output of the repeater's transmitter. Circulators provide isolation to prevent IMD. For amateur radio operators, this is important for repeater operation. Understanding this helps when reducing repeater interference.
Exam Tip
Reduce IMD in repeater = properly terminated circulator at output of repeater's transmitter. Think 'R'educe 'I'MD = 'C'irculator 'I'solation. Circulators provide isolation to prevent IMD. Not band-pass filter, not Class C, not Class D - just circulator at transmitter output.
Memory Aid
"Reduce IMD in repeater = properly terminated circulator at output of repeater's transmitter. Think 'R'educe 'I'MD = 'C'irculator. Circulators provide isolation to prevent IMD. Important for repeater operation."
Real-World Application
Reducing intermodulation interference in a repeater caused by a nearby transmitter: A properly terminated circulator at the output of the repeater's transmitter can be used. The circulator provides isolation, preventing nearby signals from entering the transmitter and causing IMD. This is the solution - circulator at transmitter output.
Key Concepts
Why Other Options Are Wrong
Option A: Incorrect. Band-pass filter in feed line between transmitter and receiver isn't the solution - circulator at transmitter output is. Band-pass filter isn't the solution.
Option C: Incorrect. Utilizing Class C final amplifier isn't the solution - circulator at transmitter output is. Class C amplifier isn't the solution.
Option D: Incorrect. Utilizing Class D final amplifier isn't the solution - circulator at transmitter output is. Class D amplifier isn't the solution.
题目解析
The correct answer is B: A properly terminated circulator at the output of the repeater's transmitter. Which of the following is used to reduce or eliminate intermodulation interference in a repeater caused by a nearby transmitter is a properly terminated circulator at the output of the repeater's transmitter. Circulators provide isolation to prevent IMD. For amateur radio operators, this is important for repeater operation. Understanding this helps when reducing repeater interference.
考试技巧
Reduce IMD in repeater = properly terminated circulator at output of repeater's transmitter. Think 'R'educe 'I'MD = 'C'irculator 'I'solation. Circulators provide isolation to prevent IMD. Not band-pass filter, not Class C, not Class D - just circulator at transmitter output.
记忆口诀
Reduce IMD in repeater = properly terminated circulator at output of repeater's transmitter. Think 'R'educe 'I'MD = 'C'irculator. Circulators provide isolation to prevent IMD. Important for repeater operation.
实际应用示例
Reducing intermodulation interference in a repeater caused by a nearby transmitter: A properly terminated circulator at the output of the repeater's transmitter can be used. The circulator provides isolation, preventing nearby signals from entering the transmitter and causing IMD. This is the solution - circulator at transmitter output.
错误选项分析
Option A: Incorrect. Band-pass filter in feed line between transmitter and receiver isn't the solution - circulator at transmitter output is. Band-pass filter isn't the solution. Option C: Incorrect. Utilizing Class C final amplifier isn't the solution - circulator at transmitter output is. Class C amplifier isn't the solution. Option D: Incorrect. Utilizing Class D final amplifier isn't the solution - circulator at transmitter output is. Class D amplifier isn't the solution.
知识点
Intermodulation interference, Repeater, Nearby transmitter, Properly terminated circulator, Output of repeater's transmitter
Verified Content
Question from official FCC Extra Class question pool. Explanation reviewed by licensed amateur radio operators.