*Question G6B11:
What is an SMA connector?*  

*Correct Answer is  B: A small threaded connector suitable for signals up to several GHz*  

### AI Response: (may contain errors)  

The correct answer is **B: A small threaded connector suitable for signals up to several GHz**. 

### Explanation of the Correct Answer:
- **SMA Connector**: The SMA (SubMiniature version A) connector is a small, threaded RF connector that is commonly used in microwave and RF applications. It is designed to handle frequencies up to about 18 GHz, making it suitable for many high-frequency applications in amateur radio and other fields.

### Why the Other Choices are Incorrect:
- **A: A type-S to type-M adaptor**: 
  - This is incorrect because an SMA connector is not specifically an adaptor; it is a distinct type of connector used for RF signals.

- **C: A connector designed for serial multiple access signals**: 
  - This is incorrect as SMA connectors are not specifically designed for serial multiple access (SMA) signals. They are primarily used for RF applications, not for data communication protocols.

- **D: A type of push-on connector intended for high-voltage applications**: 
  - This is incorrect because SMA connectors are not push-on connectors; they are threaded for secure connections. Additionally, they are not specifically designed for high-voltage applications but rather for RF signals.

### Summary:
- The SMA connector is a reliable choice for high-frequency applications due to its design and construction. It is important to understand the characteristics and applications of different connectors in amateur radio to ensure proper equipment setup and performance.