Technical Reports

Appendix B. 220 MHz PTC Locomotive Filter Test Plan and Procedures

  • 15
  • Mar
  • 2018
AUTHOR: Federal Railroad Administration
OFFICE: RPD
SUBOFFICE: RPD-33
REPORT NUMBER: DOT/FRA/ORD-18/01
KEYWORDS: Advanced Civil Speed Enforcement System, ACSES, Interoperable Train Control, ITC, Positive Train Control, PTC, locomotive radios, radio frequency filter, North American railroads, environmental testing, vibration testing, thermal testing
ABSTRACT: Radio desensing can occur between any combination of two radios, including base stations, wayside, and locomotive onboard radios. Freight railroads using the ITC system will operate on channels in the 220 MHz to 222 MHz band. Most railroads using ACSES will operate between 217 and 219 MHz. As long as adequate frequency separation exists between ITC and ACSES radio frequency (RF) bands, a combination of filtering and antenna separation can be used to mitigate desensing between any two fixed sites. Due to physical constraints and mobility, the problem is significantly more difficult to solve on a locomotive.

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