*Question G1B10:
[97.203(c)] What is the power limit for beacon stations?*  

*Correct Answer is  C: 100 watts PEP output*  

### AI Response: (may contain errors)  

In the context of amateur radio, beacon stations are used to transmit signals for the purpose of propagation studies. The FCC regulates the power output of these stations to ensure they do not interfere with other communications.

1. **Correct Answer: 100 watts PEP output**

   - The correct answer is **C: 100 watts PEP output**. According to FCC regulations, specifically 97.203(c), the maximum power limit for beacon stations is 100 watts peak envelope power (PEP). This limit is set to balance the need for effective signal propagation with the need to minimize interference with other radio services.

2. **Why the Other Choices are Incorrect:**

   - **A: 10 watts PEP output**  
     This is incorrect because the power limit for beacon stations is higher than 10 watts. While lower power levels can be used, the maximum allowed is 100 watts PEP.

   - **B: 20 watts PEP output**  
     This is also incorrect. Although 20 watts is a common power level for various amateur operations, it is not the maximum limit for beacon stations, which is 100 watts PEP.

   - **D: 200 watts PEP output**  
     This is incorrect because it exceeds the maximum power limit set by the FCC for beacon stations. The limit is 100 watts PEP, not 200 watts.

3. **Useful Information:**

   - **PEP (Peak Envelope Power):**  
     PEP is the average power supplied to the antenna transmission line by a transmitter during one RF cycle at the crest of the modulation envelope, under normal operating conditions.

   - **Regulatory Reference:**  
     The specific regulation governing this is 97.203(c), which clearly states the power limit for beacon stations.

Understanding these regulations is crucial for ensuring compliance with FCC rules and for successful operation of amateur radio stations.