*Question E8C06:
What is the bandwidth of an FT8 signal?*  

*Correct Answer is  B: 50 Hz*  

### AI Response: (may contain errors)  

The bandwidth of an FT8 signal is 50 Hz. Here's why this is the correct answer and why the other choices are incorrect:

1. **Correct Answer (50 Hz)**:
   - FT8 is a digital mode used in amateur radio that transmits data in short bursts. Each FT8 transmission occupies a bandwidth of approximately 50 Hz. This is due to the modulation scheme used, which is designed for efficient use of the available spectrum while allowing for robust communication under poor conditions.

2. **Incorrect Choices**:
   - **A: 10 Hz**: This bandwidth is too narrow for FT8. While some narrowband modes may operate around this bandwidth, FT8 requires more space to accommodate its data transmission.
   - **C: 600 Hz**: This bandwidth is too wide for FT8. While some digital modes may use this bandwidth, FT8 is specifically designed to be more efficient and compact.
   - **D: 2.4 kHz**: This is much wider than FT8's bandwidth. A bandwidth of 2.4 kHz is typical for wider modes like SSB (Single Sideband) or some other digital modes, but FT8 is much more efficient and operates within a narrower range.

3. **Useful Rules of Thumb**:
   - Digital modes like FT8 are designed to maximize efficiency and minimize bandwidth usage. 
   - When studying digital modes, remember that the bandwidth is often specified in the mode's documentation or can be found in amateur radio resources.

In summary, FT8's bandwidth of 50 Hz allows for effective communication while minimizing interference with other signals.