Automated Train Control System (ATCS)
From Signal Identification Wiki
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|---|---|
| Frequencies | 936.9875 MHz,896.8875 MHz |
| Frequency Range | 896.8875 MHz - 936.9875 MHz |
| Mode | NFM |
| Modulation | FSK |
| ACF | — |
| Emission Designator | — |
| Bandwidth | 12.5 kHz |
| Location | United States |
| Short Description | Automated Train Control System (ATCS), specifically ATCS Spec. 200, is a standardized communication system for railroads designed to ensure safety by monitoring locations of trains and locomotives, providing analysis and reporting, and automation of track warrants and similar orders. |
| I/Q Raw Recording | Download file |
| Audio Sample | |
Description[edit]
ATCS Specification 200 is a standardized communication system for railroads designed to ensure safety by monitoring locations of trains and locomotives, providing analysis and reporting, and automation of track warrants and similar orders.
- STRUCTURE: ISO 7 Layer, Synchronous HDLC-LAPB
- MAX BIT RATE: 4800 bpsBits per second (bps)
- FREQ BAND: UHFUltra High Frequency (300-3000 MHz), 900 MHzMegaHertz (MHz) 10^6 Hz duplex
- MODULATION: FSKFrequency-Shift Keying Baseband/Direct FMFrequency Modulation
- RADIO MFGR(s): Safetran, Harris, others.
- COMMS RANGE: LOS
- COMMS BETWEEN: base site, wayside, vehicle,
Samples[edit]
Frequencies[edit]
| CH # | Mobile Control Point (MCP) [MHzMegaHertz (MHz) 10^6 Hz] | Base Control Point (BCP) [MHzMegaHertz (MHz) 10^6 Hz] | Rail Company |
| 1 | 896.8875 | 935.8875 | Union Pacific |
| 2 | 896.9375 | 935.9375 | CSX |
| 3 | 896.9875 | 935.9875 | Shared ATCS Network |
| 4 | 897.8875 | 936.8875 | BNSF |
| 5 | 897.9375 | 936.9375 | Norfolk Southern |
| 6 | 897.9875 | 936.9875 | Southern Pacific |
Decoding Software[edit]
- Hobby Level Software
- ATCS Monitor, ATCS Monitor Group Membership required for ATCS Monitor files, the user will be sent a questionnaire via groups.io nominated email address.
ATCS Monitor Example[edit]
Sample Packet data...
Wayside Device - RFRadio Frequency: 5125013826 (N Wapakoneta)
2016/04/08 06:59:40
CO Datagram (1) Inbound to Ground Network (35)
Frame=34 GFI=2 Group=5 SSeq=77 Rseq=45 Beacon=0 Vital=0 UsrData=6
To Dispatch: 2125385538
Number=2.3.2 CODELINE_INDICATION_MSG
Mnemonics=1NWK,2NWK
Additional Links[edit]
Additional Images[edit]
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