*Question E1A02:
[97.301, 97.305] When using a transceiver that displays the carrier frequency of phone signals, which of the following displayed frequencies represents the lowest frequency at which a properly adjusted LSB emission will be totally within the band?*  

*Correct Answer is  D: 3 kHz above the lower band edge*  

### AI Response: (may contain errors)  

To determine the lowest frequency at which a properly adjusted Lower Sideband (LSB) emission will be totally within the band, we need to understand how LSB emissions work and the band edge definitions.

### Explanation of the Correct Answer (D: 3 kHz above the lower band edge)

- **LSB Emission**: When transmitting in LSB mode, the carrier frequency is set above the actual frequency of the signal. The LSB signal occupies frequencies below the carrier frequency.
- **Bandwidth of LSB**: For phone emissions, the typical bandwidth is about 3 kHz. This means that if you set your carrier frequency at the lower band edge, the LSB signal will extend downwards into the band, potentially going below the lower edge.

Thus, to ensure that the entire LSB signal is within the band, you need to set the carrier frequency at least 3 kHz above the lower band edge. This ensures that the lowest frequency of the LSB emission does not fall below the band edge.

### Why the Other Choices are Incorrect

- **A: The exact lower band edge**: 
  - If the carrier frequency is set at the lower band edge, the LSB signal will extend below this edge, violating band limits.

- **B: 300 Hz above the lower band edge**: 
  - Setting the carrier frequency only 300 Hz above the lower band edge means the LSB signal will still extend below the lower edge, which is not compliant.

- **C: 1 kHz above the lower band edge**: 
  - Similar to option B, a carrier frequency of 1 kHz above the lower edge will still allow the LSB signal to extend below the band edge, making it non-compliant.

### Summary

To ensure compliance with band limits for LSB emissions:
- Set the carrier frequency at least 3 kHz above the lower band edge.
- This keeps the entire LSB signal within the allocated frequency band.

This understanding is crucial for operating within legal limits and ensuring proper communication on amateur radio frequencies.