What Are the Different Zones for HDTV Antennas?by Selma Leathem
The Consumer Electronics Association has designated seven zones for HDTV Antennas. A zone describes the television reception conditions in a particular geographical location with respect to a particular source. For example, the reception conditions will be much better from a neighboring transmitting system than a station that is broadcasting farther away. Each zone requires a different type of outdoor antenna to pick up broadcasts.
This zone gets the best reception and is found where the broadcasting source is close to the geographical location of the receiving television. Small omni or multi-directional antennas are recommended for this zone. It may even be possible to get good reception with an indoor HDTV antenna.
The green zone requires a medium omni or mult-directional outdoor antenna. In this zone the signal is a bit weaker that that in the yellow zone. However, it may be possible to get a reception with an amplified indoor HDTV antenna.
Light Green Zone
Large omni or multi-directional antennas or small directional antennas are needed to get reception in this zone. However, this type of antenna might fail if there are tall buildings or mountains in the geographical location of the receiving TV, in which case an antenna suitable for the red zone would be needed.
In this zone medium directional antennas are needed. This antenna is the most popular type used, and is also recommended for either the yellow, green or light green zones if there are a lot of tall structures around.
In the blue zone the HDTV signal is weak so a medium directional antenna with a preamplifier or a large directional antenna is required to receive a broadcast in this area. These antennas are installed high on rooftops.
To receive broadcasts in this zone a large directional antenna with a preamplifier is needed. High, rooftop installation is also required.
This zone receives the weakest signal, and it requires a large directional antenna with a more powerful preamplifier than that used in the violet zone. Antennas in the violet and pink zones must be installed by professionals, and they will know which preamplifier is appropriate to use.
- antenna image by Madrider from Fotolia.com