Switzerland and the Principality of Liechtenstein
Radio Interface Regulation

784.101.21 / RIR10091)
Radio microphones and ALD

169.4875-169.5875 MHz
500 mW e.r.p.
Edition 4.0 / 01.01.2024

Nr Parameter2)DescriptionComments
1Radiocommunication service--
2ApplicationALDAssistive Listening Devices (ALD). Also referred to as aids for the hearing impaired. See also ECC/DEC/(05)02.
3Frequency band169.4875 - 169.5875 MHzAssistive Listening Devices may suffer from interference in Switzerland and in the Principality of Liechtenstein. They have to accept interference from Paging services. (The channel 169.4875- 169.5125 MHz is used for wide area paging in the north-east part of Switzerland).
5Modulation / Occupied bandwidth--
6Direction / Separation--
7Transmit power / Power densityMax. 500 mW e.r.p.-
8Channel access and occupation rules--
9Authorisation regimeSwitzerland: License exempt.
Liechtenstein: General authorisation.
Operation on NIB / NPB. (Non interference basis / non protection basis).
10Additional essential requirements--
11Frequency planning assumptionsEN 300 422-4.-
12Planned changes--
13ReferenceEN 300 422-4 / ECC/DEC(05)02 / ERC/REC 70-03, Annex 10.Effective use of spectrum / ECC Decisions / ECC Recommendations.
14Notification numberG/TBT/N/CHE/280
15RemarksEN 301 489-9-

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