Froggit WH3900, Быстрый старт

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Wireless communication is susceptible to interference, distance, walls and
metal barriers. We recommend the following best practices for trouble free
wireless communication.
Electro-Magnetic Interference (EMI)
. Keep the console several feet away
from computer monitors and TVs.
Radio Frequency Interference (RFI).
If you have other devices operating on
the same frequency band as your indoor and/or outdoor sensors and experience
intermittent communication between sensor and console, try turning off these
other devices for troubleshooting purposes. You may need to relocate the
transmitters or receivers to avoid the interference and establish reliable
communication. The frequencies used by the sensors are one of (depending on
your location): 433, 868, or 915 MHz (915 MHz for United States).
1. 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.
2.
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%
Table 5: RF Signal Strength reduction
5.6 Display console
The front and back of the display console is shown in Figure13.