Which of the following is an advantage of a digital signal processing (DSP) filter compared to an analog filter?
The correct answer is A: A wide range of filter bandwidths and shapes can be created. An advantage of a digital signal processing (DSP) filter compared to an analog filter is that a wide range of filter bandwidths and shapes can be created. DSP filters are software-programmable, allowing flexible filter design. For amateur radio operators, this provides great flexibility. Understanding this helps when using modern receivers.
Exam Tip
DSP filter advantage = wide range of filter bandwidths and shapes can be created. Think 'D'SP 'F'ilter = 'D'esignable 'F'ilters. DSP filters are software-programmable, allowing flexible filter design. Not fewer components, not reduced mixing products, not VHF-specific - just flexible filter design.
Memory Aid
"DSP filter advantage = wide range of filter bandwidths and shapes can be created. Think 'D'SP 'F'ilter = 'D'esignable 'F'ilters. DSP filters are software-programmable, allowing flexible filter design. Great flexibility advantage."
Real-World Application
A DSP filter in a modern receiver: You can select different filter bandwidths (e.g., 2.4 kHz, 1.8 kHz, 500 Hz) and shapes (e.g., sharp, gentle, notch) via software. Analog filters are fixed - you'd need different hardware for each filter. DSP provides great flexibility - wide range of bandwidths and shapes.
Key Concepts
Why Other Options Are Wrong
Option B: Incorrect. DSP filters don't require fewer digital components - DSP requires significant digital processing, not fewer components. Fewer components isn't an advantage.
Option C: Incorrect. DSP filters don't greatly reduce mixing products - mixing products come from non-linear operation, not filter type. Mixing products aren't reduced by DSP.
Option D: Incorrect. DSP filters aren't much more effective at VHF frequencies - DSP works at various frequencies, not specifically VHF. VHF effectiveness isn't the advantage.
题目解析
The correct answer is A: A wide range of filter bandwidths and shapes can be created. An advantage of a digital signal processing (DSP) filter compared to an analog filter is that a wide range of filter bandwidths and shapes can be created. DSP filters are software-programmable, allowing flexible filter design. For amateur radio operators, this provides great flexibility. Understanding this helps when using modern receivers.
考试技巧
DSP filter advantage = wide range of filter bandwidths and shapes can be created. Think 'D'SP 'F'ilter = 'D'esignable 'F'ilters. DSP filters are software-programmable, allowing flexible filter design. Not fewer components, not reduced mixing products, not VHF-specific - just flexible filter design.
记忆口诀
DSP filter advantage = wide range of filter bandwidths and shapes can be created. Think 'D'SP 'F'ilter = 'D'esignable 'F'ilters. DSP filters are software-programmable, allowing flexible filter design. Great flexibility advantage.
实际应用示例
A DSP filter in a modern receiver: You can select different filter bandwidths (e.g., 2.4 kHz, 1.8 kHz, 500 Hz) and shapes (e.g., sharp, gentle, notch) via software. Analog filters are fixed - you'd need different hardware for each filter. DSP provides great flexibility - wide range of bandwidths and shapes.
错误选项分析
Option B: Incorrect. DSP filters don't require fewer digital components - DSP requires significant digital processing, not fewer components. Fewer components isn't an advantage. Option C: Incorrect. DSP filters don't greatly reduce mixing products - mixing products come from non-linear operation, not filter type. Mixing products aren't reduced by DSP. Option D: Incorrect. DSP filters aren't much more effective at VHF frequencies - DSP works at various frequencies, not specifically VHF. VHF effectiveness isn't the advantage.
知识点
DSP filter, Wide range bandwidths, Filter shapes, Digital signal processing
Verified Content
Question from official FCC General Class question pool. Explanation reviewed by licensed amateur radio operators.