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PROCEDURE <br />Sional Insertion <br />Determine exact channel and time for testing, based on client's request. Use a <br />negative offset modulated carrier in the aeronautical NAV band between 108 and <br />117.9 MHz, or in the aeronautical COM band between 118 and 136 MHz. <br />Test frequency must be offset from aeronautical frequency allocations by 25 kHz <br />in the NAV band and 12.5 kHz in the COM band. Normally the test frequency is <br />chosen based on the video carrier of the channel taken off line. <br />Insert modulated carrier to cable head -end: <br />a. Turn off video modulator for channel being used for aerial CLI. <br />b. Insert signal generator to the combining network at 133.2375 MHz. <br />c. Measure signal level at 133.2375 MHz with spectrum analyzer and/or <br />signal level meter. Then adjust signal generator output level so test <br />frequency reads 1 dB above adjacent channels. <br />d. Leave test signal on during aerial CLI. <br />System Flyover <br />Perform system flyover at 1476 feet in a road or grid pattern (all plant covered <br />within '/ mile of pattern). Data from the GPS and Sleuth signal level readings <br />are simultaneously combined using customized software. The software collects <br />data from the CLI hardware which creates several thousand sample points which <br />are temporarily stored on the CLI laptop computer onboard the aircraft. <br />Upon completion of the flyover, the cable channel is restored and TFC equipment <br />is retrieved from the head -end. <br />The survey pilots send CLI data via internet to TFC engineering office in <br />Kalamazoo, MI for post test analysis and creation of this report. <br />En4ineerina Process <br />Use calibration factor to adjust sample points recorded for hardware level loss. <br />This factor was obtained during aerial calibration using the FSL to measure 10 <br />uV/m leak at 1476 feet. <br />Filter all data points outside of system boundary polygon. <br />Develop a frequency distribution graph, probability graph and a listing of all <br />relative high readings. <br />Plot all leak levels on digitized map showing the general locations of all relative <br />high readings along with the flight pattern. <br />Create final report to be sent to the cable company. <br />The Flyover Company, LLC -4- <br />