Deep Dive: E7F08
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.
Why Other Answers 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.
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 Example
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.
Source & Coverage
Question Pool: 2024-2028 Question Pool
Subelement: E7F
Reference: 2024-2028 Question Pool · E7 - Practical Circuits
Key Concepts
Verified Content
Question from the official FCC Extra Class pool. Explanation reviewed by licensed amateur radio operators and mapped to the E7F topic.