IEC 62106-9:2021 pdf download

IEC 62106-9:2021 pdf download.Radio data system (RDS) –VHF/FM sound broadcasting in the frequency range from 64,0 MHz to 108,0 MHz
1 Scope
This part of IEC 62106 specifies the Radio Broadcast Data System (RBDS), which is an RDS- compatible variant used in countries of North America. RBDS was first standardized by the U.S. National Radio Systems Committee (NRSC) in 1993 and subsequently revised in 1998, 2004, 2005 and 2011 2 . With the publication of this edition of IEC 62106, the RDS and RBDS standards are now harmonized into a single document. The frequency range of operation (64,0 MHz to 108,0 MHz as indicated by the title of this document) varies according to regional regulatory authority. The U.S. range is 88 MHz to 108 MHz, as set by the U.S. Federal Communications Commission. [8]
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content constitutes requirements of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. IEC 62106 (all parts), Radio Data System (RDS) – VHF/FM sound broadcasting in the frequency range from 64,0 MHz to 108,0 MHz IEC 62106-2:2021, Radio data system (RDS) – VHF/FM sound broadcasting in the frequency range from 64,0 MHz to 108,0 MHz – Part 2: Message format: coding and definition of RDS features
3 Terms, definitions and abbreviated terms
3.1 Terms and definitions  For the purposes of this document, the terms and definitions given in IEC 62106-1 apply. ISO and IEC maintain terminological databases for use in standardization at the following addresses: • • IEC Electropedia: available at http://www.electropedia.org/ ISO Online browsing platform: available at http://www.iso.org/obp
4 Coding of information
4.1 General The RBDS standard uses the same data modulation as in IEC 62106-1. It also uses the same RDS features and group type coding as in IEC 62106-2. Open Data Applications coding and registration for application identification are specified in IEC 62106-2 and IEC 62106-3, respectively. Any exceptions for RBDS to these specifications are described in 4.2. 4.2 Exceptions PI coding 4.2.1 The PI code nibbles are composed differently. The methods used are described in Annex A. 4.2.2 PTY coding The 5-bit PTY codes are defined with a different meaning in RBDS. The code definitions given in Annex B shall be used for RBDS. 4.2.3 PS For RBDS, there is no prohibition on using PS for displaying sequential information and there is no requirement that PS be static. For RBDS, there are no restrictions on the content or update rate of the PS field.
PI codes in North America are issued and used differently than in the rest of the world. In areas licensed by the U.S. Federal Communications Commission (except Guam), PI codes are calculated by the station’s call letters. 3 Stations in Canada and Mexico use PI codes starting with 0xC and 0xF, respectively (except for certain CBC FM stations in Canada as indicated in Table A.2). This gives each station a unique PI code without the need for any outside coordination. These PI codes do not make use of coverage area codes (IEC 62106-2). Coverage area codes are only valid for PI codes with nibble 1 being “B” or “E”. (PI codes with nibble 1 being “D” were repurposed for AM and HD multicast on FM translators in 2017; see Table A.2 through Table A.4). Broadcasters and receiver manufacturers shall take note of this subtle, yet significant, difference of RBDS. An optional method for forming PI codes is given in Clause A.4, which can be useful for broadcasters that are providing traffic information using RDS. Because of this optional method, broadcasters should be aware that PI codes cannot be used in receivers for decoding call letters for display. The PS (program service) data field or the RT+ field STATIONNAME.SHORT may be transmitted instead.