What is an SMA connector?
The correct answer is B: A small threaded connector suitable for signals up to several GHz. What an SMA connector is a small threaded connector suitable for signals up to several GHz. SMA (SubMiniature version A) connectors are small, threaded connectors that work well into the GHz range. For amateur radio operators, this is important for high-frequency applications. Understanding this helps when selecting connectors.
Exam Tip
SMA connector = small threaded connector suitable for several GHz. Think 'S'MA = 'S'mall 'M'iniature 'A' connector. Small, threaded connectors that work well into the GHz range. Not S-to-M adapter, not serial access, not push-on high-voltage - just small threaded GHz connector.
Memory Aid
"SMA connector = small threaded connector suitable for several GHz. Think 'S'MA = 'S'mall 'M'iniature. Small, threaded connectors that work well into the GHz range. Ideal for high-frequency applications."
Real-World Application
You need a connector for a 2.4 GHz antenna. You use an SMA connector - it's small, threaded, and works well at GHz frequencies. SMA connectors are commonly used in modern RF equipment for high-frequency applications. They're ideal for GHz operation.
Key Concepts
Why Other Options Are Wrong
Option A: Incorrect. SMA doesn't stand for type-S to type-M adapter - SMA is SubMiniature version A, not an adapter. It's a connector type, not an adapter.
Option C: Incorrect. SMA doesn't stand for serial multiple access signals - that's not what SMA means. SMA is a connector type, not a signal protocol.
Option D: Incorrect. SMA connectors aren't push-on connectors for high-voltage - they're threaded connectors for RF, not push-on or high-voltage.
题目解析
The correct answer is B: A small threaded connector suitable for signals up to several GHz. What an SMA connector is a small threaded connector suitable for signals up to several GHz. SMA (SubMiniature version A) connectors are small, threaded connectors that work well into the GHz range. For amateur radio operators, this is important for high-frequency applications. Understanding this helps when selecting connectors.
考试技巧
SMA connector = small threaded connector suitable for several GHz. Think 'S'MA = 'S'mall 'M'iniature 'A' connector. Small, threaded connectors that work well into the GHz range. Not S-to-M adapter, not serial access, not push-on high-voltage - just small threaded GHz connector.
记忆口诀
SMA connector = small threaded connector suitable for several GHz. Think 'S'MA = 'S'mall 'M'iniature. Small, threaded connectors that work well into the GHz range. Ideal for high-frequency applications.
实际应用示例
You need a connector for a 2.4 GHz antenna. You use an SMA connector - it's small, threaded, and works well at GHz frequencies. SMA connectors are commonly used in modern RF equipment for high-frequency applications. They're ideal for GHz operation.
错误选项分析
Option A: Incorrect. SMA doesn't stand for type-S to type-M adapter - SMA is SubMiniature version A, not an adapter. It's a connector type, not an adapter. Option C: Incorrect. SMA doesn't stand for serial multiple access signals - that's not what SMA means. SMA is a connector type, not a signal protocol. Option D: Incorrect. SMA connectors aren't push-on connectors for high-voltage - they're threaded connectors for RF, not push-on or high-voltage.
知识点
SMA connector, Small threaded connector, Several GHz, RF connector
Verified Content
Question from official FCC General Class question pool. Explanation reviewed by licensed amateur radio operators.