• Antenna TV Professional: This indicates that the amplifier is intended for use with antenna TV signals, which often include over-the-air broadcasts.
• Digital Signal System: This suggests that the amplifier is designed to work with digital TV signals, which are commonly used for high-definition television.
• Outdoor Case: The inclusion of “outdoor case” specifies that the amplifier is designed for outdoor use and is likely weatherproof or protected against environmental elements.
• CATV Signal Amplifier: This signifies that the device amplifies CATV (Cable TV) signals, allowing it to work with cable TV systems.
• Cable TV: This specifies that the amplifier is compatible with cable TV signals, making it suitable for cable TV distribution.

Such outdoor CATV signal amplifiers are commonly used in scenarios where signals need to be distributed to multiple endpoints outdoors, such as in commercial settings, apartment complexes, or outdoor installations. The outdoor case is essential to protect the amplifier and its components from exposure to the elements.