End of Train Device (EOTD)

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End of Train Device (EOTD)
EOTthmb.jpg
Frequencies 427.9375 MHzMegaHertz (MHz) 10^6 Hz427,937,500 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz).
427,937.5 kHzKiloHertz (kHz) 10^3 Hz
427,937.5 kHzKiloHertz (kHz) 10^3 Hz
427.938 MHzMegaHertz (MHz) 10^6 Hz
427,937.5 kHzKiloHertz (kHz) 10^3 Hz
427.938 MHzMegaHertz (MHz) 10^6 Hz
Frequency Range 427.938 MHzMegaHertz (MHz) 10^6 Hz427,937,500 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz).
427,937.5 kHzKiloHertz (kHz) 10^3 Hz
- 427.938 MHzMegaHertz (MHz) 10^6 Hz427,937,500 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz).
427,937.5 kHzKiloHertz (kHz) 10^3 Hz
Mode NFMNarrowband Frequency Modulation
Modulation
ACFAutoCorrelation Function
Bandwidth 8kHz8,000 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz).
0.008 MHzMegaHertz (MHz) 10^6 Hz
kHzKiloHertz (kHz) 10^3 Hz
0.008 MHzMegaHertz (MHz) 10^6 Hz
kHzKiloHertz (kHz) 10^3 Hz
0.008 MHzMegaHertz (MHz) 10^6 Hz
Location Worldwide
Short Description Transmits train telemetry such as brake status and accidental seperation information to the head locomotive.
I/Q Raw Recording
Audio Sample

Transmits train telemetry such as brake status and accidental seperation information to the head locomotive.

ETD devices monitor functions such as brake line pressure and accidental separation of the train using a motion sensor, functions that were previously monitored by a crew in the caboose. The ETD transmits the data via a telemetry link to the Head-of-Train Device (HTD) in the locomotive.

Frequencies[edit]

ETD's in North America operate on the 452.9375/457.9375 MHzMegaHertz (MHz) 10^6 Hz frequency pair, with the EOT Device on the higher frequency and the locomotive engine on the lower.

Decoding Software[edit]

Hobby Level Software

SoftEOT (Note requires that you have a Yahoo! account)

Video Examples[edit]

Additional Links[edit]