SUNFORD ELECTRONICS APlusBoost Home MultiRoom, Installation Manual

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6
Point the Outside Antenna toward the nearest cell phone tower. To find
the nearest tower, use an app such as 'Open Signal'. This is the most
critical step of the installation process because it will determine the
overall performance of the booster system.
The greater the separation between the Inside and Outside
Antennas, the better performance you will get from the booster.
NOTE: The Outside Antenna must be at least 40 feet (12 meters)
Straight line distance
30 feet
(9 meters) horizontal or
20 feet (6 meters) vertical from the Inside Antenna for best
performance. Make sure the Inside Antenna and Outside
Antennas are setup so they are
facing away from each other.