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BUILDING CONSTRUCTION
CONSIDERATIONS
Although the 40.68 MHz band is relatively immune to most small
metal objects in the home or installation site, some house have
building materials that must be taken into consideration. Often, it
is a
combination of several of these factors that cause problems.
Some problems to watch out for.
.
Concrete and brick with metal reinforcement
Large amounts of concrete and brick can be
troublesome, particularly in
"L"
-
shaped homes where
the signal must pass through several outer walls.
Wire lath in plaster walls
.
Insulation
.
Foil-backed insulation placed in inner walls may reflect
RF transmissions
.
Foil-backed wallpaper or large mirrors
.
Stuccowalls
Stucco is applied to a wire mesh base that may cause
problems,
especially
in
"L"
-
shaped homes.
How to avoid these problems:
.
Don’t mount the Central Controller on a wall that
contains metal, lath, or stucco mesh.
Remember, it’s critical that you identify sources of possible RF
interference and potential blocks to RF waves.
AT&T
Proprietary
Information
2-16