*Question E1C12:
[97.305(c)] In what portion of the 630-meter band are phone emissions permitted?*  

*Correct Answer is  D: The entire band*  

### AI Response: (may contain errors)  

In the 630-meter band, phone emissions are permitted throughout the entire band. Here's a breakdown of why the correct answer is "The entire band" and why the other choices are incorrect.

### Correct Answer: The entire band
- **Regulatory Rule**: According to FCC regulations, phone emissions (voice communications) are allowed across the entire 630-meter band (472-479 kHz). This means operators can use voice modes anywhere within this frequency range.

### Why the Other Choices are Incorrect:
- **Choice A: None**
  - This is incorrect because it suggests that no phone emissions are allowed, which contradicts the regulations that permit phone emissions throughout the band.

- **Choice B: Only the top 3 kHz**
  - This is incorrect because it implies that only a small portion of the band is available for phone emissions. In reality, phone emissions can be used across the entire band, not just the top 3 kHz.

- **Choice C: Only the bottom 3 kHz**
  - Similar to choice B, this is incorrect as it restricts phone emissions to a very limited part of the band. The regulations do not limit phone emissions to just the bottom 3 kHz.

### Summary
- Phone emissions are allowed throughout the entire 630-meter band, making the correct answer "The entire band." Understanding the regulations governing frequency use is crucial for operating within legal limits and for exam preparation.