United States Department of Transportation
i
PTC Radio Desense Mitigation Research Phase 2: Filter Identification and Testing
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2018-03-01
[PDF-6.73 MB]
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Alternative Title:Appendix A. Requirements for Positive Train Control 220 MHz Locomotive Radio Filter;Appendix B. 220 MHz PTC Locomotive Filter Test Plan and Procedures;
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Abstract:The Federal Railroad Administration (FRA) sponsored a project, conducted by the Transportation Technology Center, Inc. (TTCI), to identify and evaluate 220 MHz radio filter technologies that are capable of meeting requirements developed for mitigation of 220 MHz Positive Train Control (PTC) radio desense for locomotives operating on and around the Northeast Corridor (NEC). In collaboration with members of the NEC Communications Team, TTCI developed a set of requirements for the 220 MHz locomotive filters. TTCI executed laboratory baseline tests in house as well as laboratory environmental tests at a facility located in Longmont, CO, and installed a subset of the filter samples on a TTCI locomotive for a period of exposure to operations representative of revenue service. Based on the test results, some railroads are moving forward with purchasing and installing filter technologies like those tested. Special consideration and care was suggested for filter installation location and installation methods, as both can affect filter performance.
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