7
Things that block transmission
Steel, or anything with steel in it such as reinforced concrete (rebar) or metal window
screens, or a tool-room cage. Aluminum siding, and energy-saving foil on the
insulation in the walls are sneaky killers for radio waves. Some metallic paints or
metallic wallpapers also block signals.
Mirrors block transmission, because the “mirror” consists of a metallic backing on the
glass.
Windows that contain lead can kill radio transmission; also windows that are UV
coated may have thin metal energy-saving film.
High Voltage transmission lines (physically they look small, but for video
transmission purposes, they might as well be 6-foot diameter metal sewer pipes.
Other materials like brick, drywall or wood, will also cut down on the signal,
depending on water content.
VIDEO & AUDIO CABLE TERMINATION
Do not use video or audio cable that is less than ¼” in diameter, as this may not
allow a proper seal when the cable gland is tightened. If a tight seal is not made
between the cable gland and the video cable, there is a chance of water leaking
into the enclosure, causing serious damage and voiding the warranty.
Loosen the desired cable gland.
Feed the video and audio coax cable starting from the outside of the
IP-67 enclosure through the cable gland hole.
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Technologies
recommends the use of RG-59 or higher grade coaxial cable for video
and audio terminations. At this time, attach your BNC-Male connector to
your Coax Cable and terminate inside.
Tighten the cable gland to ensure a water tight seal.
