Froggit WH4000, Руководство пользователя

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intermittent communication.
3. Line of Sight Rating. This device is rated at 300 feet line of
sight (no interference, barriers or walls) but typically you will get
100 feet maximum under most real-world installations, which
include passing through barriers or walls.
4. Metal Barriers. Radio frequency will not pass through metal
barriers such as aluminum siding. If you have metal siding, align
the remote and console through a window to get a clear line of
sight.
The following is a table of reception loss vs. the transmission
medium. Each “wall” or obstruction decreases the transmission
range by the factor shown below.
Medium RF Signal Strength Reduction
Glass (untreated) 5-15%
Plastics 10-15%
Wood 10-40%
Brick 10-40%
Concrete 40-80%
Metal 90-100%