*Question E2B08:
What technique allows commercial analog TV receivers to be used for fast-scan TV operations on the 70-centimeter band?*  

*Correct Answer is  A: Transmitting on channels shared with cable TV*  

### AI Response: (may contain errors)  

The correct answer to the question about using commercial analog TV receivers for fast-scan TV operations on the 70-centimeter band is:

**Correct Answer: A: Transmitting on channels shared with cable TV**

### Explanation of the Correct Answer:
- **Commercial analog TV receivers** can be adapted for fast-scan TV (also known as SSTV) operations by utilizing channels that are shared with cable TV. This is because many cable TV systems use frequencies that overlap with the 70-centimeter amateur band (420-450 MHz). 
- By transmitting on these shared channels, operators can effectively use existing analog TV receivers to receive SSTV signals without needing specialized equipment.

### Why the Other Choices are Incorrect:
- **B: Using converted satellite TV dishes**  
  - While satellite dishes can be used for receiving signals, they are not specifically designed for the 70-centimeter band and would require significant modification to work with fast-scan TV. This option does not directly relate to the use of commercial analog TV receivers.

- **C: Transmitting on the abandoned TV channel 2**  
  - Channel 2 operates at a frequency of 54-60 MHz, which is well below the 70-centimeter band. Therefore, this option is not applicable for fast-scan TV operations on the 70-centimeter band.

- **D: Using USB and demodulating the signal with a computer sound card**  
  - While using USB (Upper Sideband) and demodulating with a computer sound card is a valid technique for digital modes, it does not pertain to the use of commercial analog TV receivers. This method is more relevant for digital communications rather than analog TV.

### Summary:
- The key to using commercial analog TV receivers for fast-scan TV on the 70-centimeter band lies in the ability to transmit on channels that are shared with cable TV, allowing for compatibility with existing equipment. 

This understanding is crucial for the Extra Class exam, as it highlights the intersection of amateur radio operations and existing commercial technologies.