*Question T7B09:
What should be the first step to resolve non-fiber optic cable TV interference caused by your amateur radio transmission?*  

*Correct Answer is  D: Be sure all TV feed line coaxial connectors are installed properly*  

### AI Response: (may contain errors)  

To resolve non-fiber optic cable TV interference caused by your amateur radio transmission, the first step should be to ensure that all TV feed line coaxial connectors are installed properly. Here's why this is the correct answer and why the other options are not suitable:

### Correct Answer: D - Be sure all TV feed line coaxial connectors are installed properly

- **Explanation**: Poorly installed or loose connectors can lead to signal leakage and increased susceptibility to interference. Ensuring that all connectors are tight and properly seated helps minimize the potential for interference from your amateur radio transmissions. This is a fundamental step in troubleshooting any interference issue.

### Why the Other Choices are Incorrect:

- **A: Add a low-pass filter to the TV antenna input**  
  - **Explanation**: A low-pass filter allows low-frequency signals to pass while attenuating higher frequencies. However, amateur radio transmissions often operate at higher frequencies, and a low-pass filter may not effectively reduce interference from these signals. It could also degrade the quality of the TV signal.

- **B: Add a high-pass filter to the TV antenna input**  
  - **Explanation**: A high-pass filter allows high-frequency signals to pass while blocking lower frequencies. This would not be effective for reducing interference from amateur radio transmissions, which may fall within the frequency range of the TV signals. It could also block desired TV signals.

- **C: Add a preamplifier to the TV antenna input**  
  - **Explanation**: While a preamplifier can boost weak TV signals, it can also amplify any interference present. If the interference from your amateur radio is strong, adding a preamplifier could worsen the problem by increasing the overall noise level, making it harder to receive clear TV signals.

### Summary

- The first step in resolving interference is to check the integrity of the connectors (Choice D).
- Filters (Choices A and B) may not effectively address the interference issue.
- A preamplifier (Choice C) could exacerbate the problem rather than solve it.

By ensuring proper installation of connectors, you can significantly reduce the risk of interference and improve the overall performance of your TV system.