Switzerland and the Principality of Liechtenstein
Radio Interface Regulation

784.101.21 / RIR01011)
Aeronautical communications

RIR0101-04
Aeronautical communications
117.975 - 137.000 MHz
VDL Mode 4
Edition 4.1 / 01.04.2019

Nr Parameter2)DescriptionComments
1Radiocommunication serviceAeronautical mobile-
2ApplicationAeronautical communicationsVHF digital link, VDL Mode 4
3Frequency band117.975 - 137.000 MHzOnly 136.925 MHz according ICAO EUR Doc 011.
4Channelling25 kHz-
5Modulation / Occupied bandwidthGFSK19.2 kbps (Gaussian Filtered Frequency Shift Keying)
6Direction / Separation--
7Transmit power / Power densityMax. 250 W-
8Channel access and occupation rulesSTDMA(Self-organising Time Division Multiple Access)
9Authorisation regimeSwitzerland: License required.
Liechtenstein: Individual assignment required.
-
10Additional essential requirements--
11Frequency planning assumptionsICAO Annex 10, Volume V, ICAO EUR Doc 011 (under development).-
12Planned changes--
13ReferenceEN 301 842-5 /-/-.Effective use of spectrum / ECC Decisions / ECC Recommendations.
14Notification numberG/TBT/N/CHE/102
2008/9503/CH
-
15RemarksEN 301 489-22, ICAO Annex 10, Volume III, Volume V, ICAO EUR Doc 011.-

Normative part: 1 to 11
Informative part: Nr 12 to 15

1) RIR for similar and/or other applications are available under: https://www.bakom.admin.ch/bakom/en/home/frequenzen-antennen/nationaler-frequenzzuweisungsplan/schnittstellen-anforderungen.html
2) For explanations and legal status, please refer to basis document 784.101.21 / RIR0000