Which of the following types of noise can often be reduced by a digital noise reduction?
The correct answer is D: All these choices are correct. Which of the following types of noise can often be reduced by a digital noise reduction includes: broadband white noise, ignition noise, and power line noise. All three can be reduced by digital noise reduction. For amateur radio operators, this is important for receiver operation. Understanding this helps when using noise reduction.
Exam Tip
All three can be reduced by digital noise reduction: broadband white noise, ignition noise, power line noise. When all listed noise types can be reduced by digital noise reduction, 'all of the above' is usually the answer. All are valid noise reduction targets.
Memory Aid
"All three can be reduced by digital noise reduction: Broadband white noise, Ignition noise, Power line noise. Think 'A'll 'N'oise 'R'eduction. All three are valid noise reduction targets. Important for receiver operation."
Real-World Application
Digital noise reduction: It can often reduce broadband white noise, ignition noise, and power line noise. Digital noise reduction algorithms can identify and reduce various types of noise. This is what can be reduced - all these noise types.
Key Concepts
Why Other Options Are Wrong
Option A: While correct, this is incomplete. Ignition noise and power line noise can also be reduced.
Option B: While correct, this is incomplete. Broadband white noise and power line noise can also be reduced.
Option C: While correct, this is incomplete. Broadband white noise and ignition noise can also be reduced.
题目解析
The correct answer is D: All these choices are correct. Which of the following types of noise can often be reduced by a digital noise reduction includes: broadband white noise, ignition noise, and power line noise. All three can be reduced by digital noise reduction. For amateur radio operators, this is important for receiver operation. Understanding this helps when using noise reduction.
考试技巧
All three can be reduced by digital noise reduction: broadband white noise, ignition noise, power line noise. When all listed noise types can be reduced by digital noise reduction, 'all of the above' is usually the answer. All are valid noise reduction targets.
记忆口诀
All three can be reduced by digital noise reduction: Broadband white noise, Ignition noise, Power line noise. Think 'A'll 'N'oise 'R'eduction. All three are valid noise reduction targets. Important for receiver operation.
实际应用示例
Digital noise reduction: It can often reduce broadband white noise, ignition noise, and power line noise. Digital noise reduction algorithms can identify and reduce various types of noise. This is what can be reduced - all these noise types.
错误选项分析
Option A: While correct, this is incomplete. Ignition noise and power line noise can also be reduced. Option B: While correct, this is incomplete. Broadband white noise and power line noise can also be reduced. Option C: While correct, this is incomplete. Broadband white noise and ignition noise can also be reduced.
知识点
Digital noise reduction, Broadband white noise, Ignition noise, Power line noise
Verified Content
Question from official FCC Extra Class question pool. Explanation reviewed by licensed amateur radio operators.