What is the function of decimation?
The correct answer is B: Reducing the effective sample rate by removing samples. What is the function of decimation is reducing the effective sample rate by removing samples. Decimation reduces sample rate by discarding samples. For amateur radio operators, this is important for digital signal processing. Understanding this helps when working with DSP.
Exam Tip
Decimation function = reducing effective sample rate by removing samples. Think 'D'ecimation = 'D'ecimates samples (removes samples). Decimation reduces sample rate by discarding samples. Not BCD conversion, not attenuation, not removing digits - just reducing sample rate by removing samples.
Memory Aid
"Decimation function = reducing effective sample rate by removing samples. Think 'D'ecimation = 'R'emoves samples. Decimation reduces sample rate by discarding samples. Important for digital signal processing."
Real-World Application
Decimation: Its function is reducing the effective sample rate by removing samples. For example, decimation by 2 removes every other sample, halving the sample rate. This is the function - reducing sample rate by removing samples.
Key Concepts
Why Other Options Are Wrong
Option A: Incorrect. Converting data to binary-coded decimal isn't decimation - decimation reduces sample rate by removing samples. BCD conversion isn't decimation.
Option C: Incorrect. Attenuating the signal isn't decimation - decimation reduces sample rate by removing samples. Attenuation isn't decimation.
Option D: Incorrect. Removing unnecessary significant digits isn't decimation - decimation reduces sample rate by removing samples. Removing digits isn't decimation.
题目解析
The correct answer is B: Reducing the effective sample rate by removing samples. What is the function of decimation is reducing the effective sample rate by removing samples. Decimation reduces sample rate by discarding samples. For amateur radio operators, this is important for digital signal processing. Understanding this helps when working with DSP.
考试技巧
Decimation function = reducing effective sample rate by removing samples. Think 'D'ecimation = 'D'ecimates samples (removes samples). Decimation reduces sample rate by discarding samples. Not BCD conversion, not attenuation, not removing digits - just reducing sample rate by removing samples.
记忆口诀
Decimation function = reducing effective sample rate by removing samples. Think 'D'ecimation = 'R'emoves samples. Decimation reduces sample rate by discarding samples. Important for digital signal processing.
实际应用示例
Decimation: Its function is reducing the effective sample rate by removing samples. For example, decimation by 2 removes every other sample, halving the sample rate. This is the function - reducing sample rate by removing samples.
错误选项分析
Option A: Incorrect. Converting data to binary-coded decimal isn't decimation - decimation reduces sample rate by removing samples. BCD conversion isn't decimation. Option C: Incorrect. Attenuating the signal isn't decimation - decimation reduces sample rate by removing samples. Attenuation isn't decimation. Option D: Incorrect. Removing unnecessary significant digits isn't decimation - decimation reduces sample rate by removing samples. Removing digits isn't decimation.
知识点
Function, Decimation, Reducing effective sample rate, Removing samples
Verified Content
Question from official FCC Extra Class question pool. Explanation reviewed by licensed amateur radio operators.