TM80 Telemetry Monitor Service Manual 3-61
Barrier
Degree of
attenuation
Example
Metal net in
Medium Door and partition wall
Metal colored
Low Colored window
Damp wood, glass jar and organism
Damp wood, glass jar and organism
Interior wall, outer wall and ground
Ceramic tile, ceiling and ground
Ground, outer wall and load-bearing beam
Bullet-proof
High Safety shed
Metal Very high
Office table, office partition wall, concrete,
elevator, file cabinet and ventilating device
1. The maximum indoor transmission distance of wifi is about 50m. In
practice, the distance of distinct vision is recommended to be 25m to
guarantee coverage. If a brick wall blocks the way, the recommended
distance should be divided by 2; if two brick walls block the way, the
recommended distance should be divided by 2 again. If a load bearing wall
blocks the way, the transmission distance would be greatly reduced. For
one load bearing wall, the transmission distance would be divided by 4.
2. After completing cabling construction, draw the AP cabling diagram to
facilitate system operation and maintenance in the future.
3. Initially select locations of APs according to the actual scenario and
requirements and then make adjustment through field measurement.
Follow the rules: Ensure that all areas can be covered and try to reduce the
number of needed APs.
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