Many different things can impact antenna's performance. Distance from towers, signal blockage by terrain and even some types of building structures can impede performance. Generally, the higher the antenna is above the ground, the better it performs.
The amount and quality of the channels you receive will depend on the following:
Channels being broadcast in your area
Broadcast tower locations
Strength of the broadcast signals
Terrain obstructions such as hills, mountain, trees, buildings, etc.
Read the instruction carefully to decide what antenna will work best for you, we will help you with any troubleshooting issues.