ANNEX 4: RAILWAY APPLICATIONS

Scope of annex
This annex covers frequency bands and regulatory as well as informative parameters recommended for applications specifically intended for use on railways. The sub-bands below are intended for the following applications: Band a) Balise up-link (ground to train) systems including Eurobalise; Band b) Loop up-link (ground to train) systems including Euroloop; Band c) Balise tele-powering and down-link (train to ground) systems including Eurobalise and activation of the Loop / Euroloop; Band d) Obstruction/Vehicle detection via radar sensor at railway level crossings.

Frequency Band		Power / Magnetic Field	Spectrum access and mitigation requirements	Modulation /occupied bandwidth	ECC/ERC Deliverable	Notes
a	984kHz  -  7484kHz	9 dBµA/m at 10 m	≤ 1% duty cycle	Not specified		Transmitting only on receipt of a Balise/Eurobalise tele-powering signal from a train. Note: Centre frequency is 4234 kHz
b	7300kHz  -  23000kHz	-7 dBµA/m at 10 m	No requirement	Not specified		Maximum field strength specified in a bandwidth of 10 kHz, spatially averaged over any 200 m length of the loop. Transmitting only in presence of trains. Spread Spectrum Signal, Code Length: 472 Chips. Note: Centre frequency is 13.547 MHz
c	27090kHz  -  27100kHz	42 dBµA/m at 10 m	No requirement	Not specified		Tele-powering and Down-link signal for Balise/Eurobalise. May also be optionally used for the activation of the Loop/Euroloop. Note: Centre frequency is 27.095 MHz
d	76GHz  -  77GHz	55 dBm peak e.i.r.p.	No requirement	Not specified		Obstruction/Vehicle detection via radar Sensor at railway level crossings. 50 dBm average power or 23.5 dBm average power for pulse radar. The frequency band is also included in Annex 5

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