What type of electrical interference can be caused by computer network equipment?
The correct answer is C: The appearance of unstable modulated or unmodulated signals at specific frequencies. What type of electrical interference can be caused by computer network equipment is the appearance of unstable modulated or unmodulated signals at specific frequencies. Computer network equipment generates RF interference at specific frequencies. For amateur radio operators, this is important for troubleshooting interference. Understanding this helps when identifying interference sources.
Exam Tip
Computer network interference = appearance of unstable modulated or unmodulated signals at specific frequencies. Think 'C'omputer 'N'etwork = 'C'reates 'N'arrowband signals. Computer network equipment generates RF interference at specific frequencies. Not AC hum, not clicking, not whining - just unstable signals at specific frequencies.
Memory Aid
"Computer network interference = appearance of unstable modulated or unmodulated signals at specific frequencies. Think 'C'omputer 'N'etwork = 'S'ignals at 'F'requencies. Computer network equipment generates RF interference at specific frequencies. Important for troubleshooting interference."
Real-World Application
Computer network equipment: It can cause electrical interference appearing as unstable modulated or unmodulated signals at specific frequencies. For example, Ethernet switches, routers, and Wi-Fi equipment can generate RF signals that interfere with amateur radio. This is the interference type - unstable signals at specific frequencies.
Key Concepts
Why Other Options Are Wrong
Option A: Incorrect. Loud AC hum in audio output isn't from computer network equipment - computer equipment causes RF signals at specific frequencies. AC hum isn't the interference.
Option B: Incorrect. Clicking noise at intervals isn't from computer network equipment - computer equipment causes RF signals at specific frequencies. Clicking noise isn't the interference.
Option D: Incorrect. Whining-type noise that pulses isn't from computer network equipment - computer equipment causes RF signals at specific frequencies. Whining noise isn't the interference.
题目解析
The correct answer is C: The appearance of unstable modulated or unmodulated signals at specific frequencies. What type of electrical interference can be caused by computer network equipment is the appearance of unstable modulated or unmodulated signals at specific frequencies. Computer network equipment generates RF interference at specific frequencies. For amateur radio operators, this is important for troubleshooting interference. Understanding this helps when identifying interference sources.
考试技巧
Computer network interference = appearance of unstable modulated or unmodulated signals at specific frequencies. Think 'C'omputer 'N'etwork = 'C'reates 'N'arrowband signals. Computer network equipment generates RF interference at specific frequencies. Not AC hum, not clicking, not whining - just unstable signals at specific frequencies.
记忆口诀
Computer network interference = appearance of unstable modulated or unmodulated signals at specific frequencies. Think 'C'omputer 'N'etwork = 'S'ignals at 'F'requencies. Computer network equipment generates RF interference at specific frequencies. Important for troubleshooting interference.
实际应用示例
Computer network equipment: It can cause electrical interference appearing as unstable modulated or unmodulated signals at specific frequencies. For example, Ethernet switches, routers, and Wi-Fi equipment can generate RF signals that interfere with amateur radio. This is the interference type - unstable signals at specific frequencies.
错误选项分析
Option A: Incorrect. Loud AC hum in audio output isn't from computer network equipment - computer equipment causes RF signals at specific frequencies. AC hum isn't the interference. Option B: Incorrect. Clicking noise at intervals isn't from computer network equipment - computer equipment causes RF signals at specific frequencies. Clicking noise isn't the interference. Option D: Incorrect. Whining-type noise that pulses isn't from computer network equipment - computer equipment causes RF signals at specific frequencies. Whining noise isn't the interference.
知识点
Electrical interference, Computer network equipment, Unstable modulated or unmodulated signals, Specific frequencies
Verified Content
Question from official FCC Extra Class question pool. Explanation reviewed by licensed amateur radio operators.