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City of Decatur, IL Radio Path �Survey <br /> Overview <br /> The City of Decatur presently utilizes a combination of radio and telephone as their <br /> communication medium for telemetry throughout their water system. <br /> A study will be performed to analyze the feasibility of using radio telemetry as a means of <br />� data transmission to monitor the City's sources of water supply, and water distribution. <br /> This study will establish the groundwork for the system and ensures a complete working <br /> system at startup. <br /> These front-end efforts will save numerous hours of trial and error and eliminate <br /> interference and regulatory issues before the system is installed. <br /> The study is divided into three major parts; a frequency search, a computerized path study <br /> (Desk-top Survey) and a field site path survey (On-site Survey). The results will be <br /> presented in a meeting with city personnel and consulting engineer. <br /> I. Frequency Search <br /> A. Search <br /> A search will be conducted for existing frequencies in use in the vicinity of the proposed <br /> monitoring sites. The preferred frequency is 450 MHz,with 900 MHZ spread spectrum as <br /> an alternate frequency. <br /> B. Frequency Analysis Summary: , <br /> A complete summary will be provided detailing the approach utilized to determine the <br /> available frequencies and the results. <br /> II. Desk-top SurveX <br /> A. Computerized Path Profile Study: <br /> A computerized path study is performed utilizing a digitized USGS topographical <br /> database for terrain analysis and obstruction modeling. This study allows the engineer to <br /> study the terrain profile and how it affects the proposed signal transrnission paths. Using <br /> this information, the engineer is able to analyze the best radio paths based upon terrain, <br />