wherein a site could be located to fill the coverage gap.See Att.13: Search Ring. The engineers <br />took the following objectives into consideration when identifying the search ring: <br />1.Coverage. The antenna site must be located in an area where the radio frequency <br />broadcasts will provide adequate coverage within the significant gap in coverage. The RF <br />engineer must take into consideration the coverage objectives for the site as well as the <br />terrain in and around the area to be covered. Since radio frequency broadcasts travel in <br />a straight line and diminish as they travel further away from the antennas, it is generally <br />best to place an antenna site near the center of the desired coverage area. However, in <br />certain cases, the search ring may be located away from the center of the desired <br />coverage area due to the existing coverage, the surrounding terrain, or other features <br />which might affect the radio frequency broadcasts like buildings or sources of electrical <br />interference. <br />2.Clutter. AT&T’s antennas must “clear the clutter” in the area. The radio frequencies used <br />in AT&T’s systems are adversely affected by trees, buildings, and other natural and man- <br />made obstacles. AT&T’s radio frequencies do not penetrate mountains, hills, rocks or <br />metal, and its radio frequencies are diminished by trees, brick and wood walls, and other <br />structures. Therefore, AT&T’s antennas must be installed above or close to the “clutter” <br />in order to provide high quality communications services in the desired coverage areas. <br />In addition, if the local code requires us to accommodate additional carriers on the <br />structure, the structure must be even higher in order to allow the other carriers’ antennas <br />to clear the clutter as well. <br />3.Call Handoff. The antenna site must be located in an area where the radio broadcasts <br />from this site will allow seamless call handoff with adjacent sites. “Call handoff” is a <br />feature of a wireless communications system which allows an ongoing telephone <br />conversation to continue uninterrupted as the user travels from the coverage area of one <br />antenna site into the coverage area of an adjacent antenna site. This requires coverage <br />overlap for a sufficient distance and/or period of time to support the mechanism of the <br />handoff. <br />4.Quality of Service. Users of wireless communications services want to use their services <br />where they live, work, commute and play, including when they are indoors. AT&T’s <br />coverage objectives include the ability to provide indoor coverage in areas where there <br />are residences, businesses and indoor recreational facilities. <br />5.Radio Frequencies used by System. The designs of telecommunications systems will vary <br />greatly based upon the radio frequencies that are used by the carrier. If the carrier uses <br />radio frequencies that are in the 850 MHz to 950 MHz range, the radio signals will travel <br />further and will penetrate buildings better than radio frequencies in the 1900 MHz band. <br />6.Land Use Classifications. AT&T’s ability to construct a cell site on any particular property <br />is affected by Oregonstate law and Eugene city code. <br />Site ID: EG46 Fox Hollow & Amazon RoadPage 3of 22 <br />