What is a crystal lattice filter?
The correct answer is D: A filter for low-level signals made using quartz crystals. What is a crystal lattice filter is a filter for low-level signals made using quartz crystals. Crystal lattice filters use quartz crystals for filtering. For amateur radio operators, this is important for filter design. Understanding this helps when working with crystal filters.
Exam Tip
Crystal lattice filter = filter for low-level signals made using quartz crystals. Think 'C'rystal 'L'attice = 'C'rystal 'L'ow-level filter. Crystal lattice filters use quartz crystals for filtering. Not power supply, not audio, not just lattice-shaped - just filter for low-level signals using crystals.
Memory Aid
"Crystal lattice filter = filter for low-level signals made using quartz crystals. Think 'C'rystal 'L'attice = 'L'ow-level 'C'rystal filter. Crystal lattice filters use quartz crystals for filtering. Important for filter design."
Real-World Application
A crystal lattice filter: It's a filter for low-level signals made using quartz crystals. Multiple crystals are arranged in a lattice configuration to create the filter. This is what it is - filter for low-level signals using crystals.
Key Concepts
Why Other Options Are Wrong
Option A: Incorrect. Power supply filter made with interlaced quartz crystals isn't crystal lattice - crystal lattice is for low-level signals. Power supply filter isn't crystal lattice.
Option B: Incorrect. Audio filter made with four crystals at 1 kHz intervals isn't crystal lattice - crystal lattice is for low-level signals using crystals. Audio filter isn't crystal lattice.
Option C: Incorrect. Filter using lattice-shaped crystals for high-Q isn't specific enough - crystal lattice is for low-level signals using crystals. Lattice-shaped isn't specific.
题目解析
The correct answer is D: A filter for low-level signals made using quartz crystals. What is a crystal lattice filter is a filter for low-level signals made using quartz crystals. Crystal lattice filters use quartz crystals for filtering. For amateur radio operators, this is important for filter design. Understanding this helps when working with crystal filters.
考试技巧
Crystal lattice filter = filter for low-level signals made using quartz crystals. Think 'C'rystal 'L'attice = 'C'rystal 'L'ow-level filter. Crystal lattice filters use quartz crystals for filtering. Not power supply, not audio, not just lattice-shaped - just filter for low-level signals using crystals.
记忆口诀
Crystal lattice filter = filter for low-level signals made using quartz crystals. Think 'C'rystal 'L'attice = 'L'ow-level 'C'rystal filter. Crystal lattice filters use quartz crystals for filtering. Important for filter design.
实际应用示例
A crystal lattice filter: It's a filter for low-level signals made using quartz crystals. Multiple crystals are arranged in a lattice configuration to create the filter. This is what it is - filter for low-level signals using crystals.
错误选项分析
Option A: Incorrect. Power supply filter made with interlaced quartz crystals isn't crystal lattice - crystal lattice is for low-level signals. Power supply filter isn't crystal lattice. Option B: Incorrect. Audio filter made with four crystals at 1 kHz intervals isn't crystal lattice - crystal lattice is for low-level signals using crystals. Audio filter isn't crystal lattice. Option C: Incorrect. Filter using lattice-shaped crystals for high-Q isn't specific enough - crystal lattice is for low-level signals using crystals. Lattice-shaped isn't specific.
知识点
Crystal lattice filter, Filter for low-level signals, Made using quartz crystals
Verified Content
Question from official FCC Extra Class question pool. Explanation reviewed by licensed amateur radio operators.