*Question E1B08:
[97.121] What limitations may the FCC place on an amateur station if its signal causes interference to domestic broadcast reception, assuming that the receivers involved are of good engineering design?*  

*Correct Answer is  D: The amateur station must avoid transmitting during certain hours on frequencies that cause the interference*  

### AI Response: (may contain errors)  

To understand the limitations the FCC may place on an amateur station causing interference to domestic broadcast reception, let's analyze the correct answer and the other options.

### Correct Answer: 
**D: The amateur station must avoid transmitting during certain hours on frequencies that cause the interference.**

- **Explanation**: The FCC recognizes that amateur radio operators have the right to use their frequencies, but they must also ensure that their operations do not cause harmful interference to licensed services, such as broadcast stations. If interference occurs, the FCC may require the amateur operator to avoid transmitting during specific times or on certain frequencies to mitigate the issue. This is a common practice to balance the rights of amateur operators with the need to protect established services.

### Why the Other Choices are Incorrect:

- **A: The amateur station must cease operation.**
  - **Explanation**: This option is too extreme. The FCC does not typically require an amateur station to completely cease operation unless the interference is severe and persistent. Instead, they often seek a compromise that allows continued operation with certain restrictions.

- **B: The amateur station must cease operation on all frequencies below 30 MHz.**
  - **Explanation**: This choice is also too broad. The FCC does not impose a blanket ban on all frequencies below 30 MHz unless the interference is specifically linked to those frequencies. Operators may still use other frequencies that do not cause interference.

- **C: The amateur station must cease operation on all frequencies above 30 MHz.**
  - **Explanation**: Similar to option B, this is an overly broad restriction. The FCC would not require cessation on all frequencies above 30 MHz unless there is clear evidence that those frequencies are causing interference. 

### Summary:
- The FCC aims to balance amateur operations with the protection of licensed services.
- Operators may need to adjust their transmission times or frequencies to avoid interference, rather than completely ceasing operations.

### Useful Rule of Thumb:
- Always be aware of your operating environment and the potential for interference, especially when transmitting near broadcast frequencies. If interference is reported, be prepared to adjust your operating schedule or frequency to resolve the issue amicably.