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Agenda - 01-28-2014 - 2
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Agenda - 01-28-2014 - 2
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6/3/2015 8:43:30 AM
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1/24/2014 3:54:22 PM
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BOCC
Date
1/28/2014
Meeting Type
Work Session
Document Type
Agenda
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3
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Orange County NC <br />Radio Communication Tower and System Infrastructure Upgrade <br />RF Coverage and Sites /Towers <br />Address: 4900 NC 54 W, Chapel Hill, NC <br />Coordinates: 35 -56 -01.4, 79 -12 -55.4 <br />Tower Type: Monopole <br />Tower Height: 199 ft. <br />Proposed VIPER antenna heights: <br />• 1 -800 MHz Tx antenna — DB809 (max 12.2 ft.), 130 ft. centerline <br />• 1 -800 MHz Tx transmission line — 1 '/4 inch <br />• 1 -800 MHz Rx antenna — DB809 (max 12.2 ft.), 150 ft. centerline <br />• 1 -800 MHz TTA — 16 "H x 12 "W x 7.5 "D, 39 #, 150 ft. or close to bottom of Rx <br />antenna <br />• 1 -800 MHz Rx transmission line — 7/8 inch <br />• 1- Microwave dish - Comscope WHP6- 65- P1A/K, 6 ft., 141 or 138 ft., [Chatham, <br />Cane] <br />• 1- Microwave transmission line — EWP63S jacketed, approx.1" x 2" elliptical <br />waveguide <br />Site Contact: SBA, Elaine Tarkington, 919 - 868 -0426, etarkingtonpsbasite.com <br />This site could provide 800 MHz VIPER coverage in the southeast portion of the <br />County. <br />This site is owned by VilComm Interactive Media and is used by WCHL AM. <br />Investigations have shown that this is an AM broadcast location, and that the towers <br />themselves are the antenna. This is referred to as a "hot" tower. There are two towers <br />at this location, as the WCHL uses two different radiation patterns, one for daylight <br />hours, and one for nighttime hours. Since the towers are very close to each other, <br />either tower would provide the coverage desired. <br />Since these are "hot" towers, isolation equipment is required between the radio <br />equipment and the transmission lines and antennas that are mounted on the towers. <br />Detailed engineering will be required to use this site, and will include designing the <br />insolation equipment based on specific frequencies to be used, as well as ensuring that <br />the AM broadcast pattern is not affected. <br />August 30, 2013 Page 8 of 51 <br />B <br />9 <br />
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