Positive Train Control (PTC)

Positive Train Control

Frequencies	220 MHz
Frequency Range	220 MHz - 220 MHz
Mode	RAW
Modulation	—
ACF	—
Emission Designator	—
Bandwidth	20 kHz
Location	United States
Short Description	Positive train control (PTC) is a system of functional requirements for monitoring and controlling train movements as an attempt to provide increased safety.
I/Q Raw Recording	Download file
Audio Sample

Positive train control (PTC) is a system of functional requirements for monitoring and controlling train movements as an attempt to provide increased safety. PTC is currently being implemented in the United States on freight, intercity, and commuter rail lines.

PTC can have various implementations, including ACSES and I-ETMS. TDMATime Division Multiple Access is used in this particular sample recorded.

Frequencies

PTC is designated to use the 220MHz frequency band.

Additional Links

• FRA Report to Congress on Positive Train Control, 2012
• Wikipedia PTC

Additional Images

Diagram of PTC operation Diagram of PTC operation ACSES Track Transponder Analysis of PTC signal, 11ms burst Analysis of PTC signal, 12ms burst