[A-DX] RDS wurde 30, RDS 2.0, Hybrides Radio, Brasil: Extensão da Faixa da FM ==> "eFM"

Fr Dez 26 00:10:12 CET 2014

Der RDS-Versuchsbetrieb wurde ab 1984 aufgenommen, offizielle Einführung 
war der 1. April 1988

The RDS 2.0 project

The system, RDS 2.0 that RDS Forum member Attila Ladanyi presented would 
make use of multiple RDS carriers using the ODA concept. He observed 
that the implementation of RDS 2.0 would not be very expensive for 

It was agreed to set up a specialist group to meet at Budapest on 10 to 
12 November 2014 and their agreed mandate is:

     Identify existing unused functions within RDS 1.0;
     Ensure complete compatibility with RDS 1.0;
     Establish a consensus on a set of high level customer requirements, 
PS names with up to 16 characters for example;
     Define the technical and upgradable architecture based on agreed 
standards and regulations;
     Identify the work items and expertise needed.

The first deliverable will be the outcome of this feasibility study, to 
be ready before March 2015 and to be studied by the full Forum for 
discussion and approval during the next Forum meeting and then define 
the next steps

It was observed that the increased data transmission capacity would help 
future TTI and Hybrid Radio projects.

Other topics considered during the RDS Forum 2014 meeting

ITU: The ITU expert report from 2013, “Trends in broadcasting” confirms 
the long future of FM radio. The conclusions read “FM will remain an 
important means of delivery of audio broadcasting. In general switch-off 
of FM stations lies far ahead, but a few countries may have switched-off 
analogue radio.”

Question about FM Band extension in Brazil and elsewhere: On a question 
raised by one of the Forum members, the Brazilian regulator ANATEL was 
contacted, who confirmed the planned extension of the FM band down to 76 
MHz. This was in fact agreed already. It was remarked that there will be 
a problem with RDS then in the range 76-87.5 MHz, with no AF codes being 
defined for that range. With RDS 2.0 this problem could be solved 
however. It was also remarked that China plans to use FM radio down to 
64 MHz, a matter also to be followed up for RDS 2.0


RDS2.0  soll voll  abwärtskompatibel zum alten RDS sein,  bei 
Frequenzerweiterungen ab 64 MHz  gibt es ja schon etliche Kinesengeräte, 
die auch diesen Bereich schon meistern....
Bei SDR -Empfangskonzepten dürfte auch die Spiegelfrequenzproblematik 

Die Erweiterung des FM-Bandes in Brasilien um den Bereich der TV-Kanäle 
5 und 6 soll aber vorerst nur Gemeinden betreffe, in denen der 
UKW-Bereich überlastet ist:
O executivo explicou os detalhes do Decreto que permite a migração 
afirmando que neste momento a SET/Abert estão estudando a extensão da 
Faixa de FM, ela ira de 76 a 88 MHz (nos canais 5 e 6 de TV) que será 
“feita para todo o Brasil, mas será necessária apenas para os municípios 
em que o espectro esteja congestionado”.

Kleinstsender für diesen Bereich gibt es schon:

oder als 7-watt-Platine:

Hier noch ein interessantes Dokument zur Migration MW/OM ==> erweitertes 
FM    "eFM"        (Extensão da Faixa da FM e a Migração da Faixa de OM)

Seite  36,   Einteilung der MW-Sender in Abhängigkeit von Sendeleistung 
und Frequenz  in die neuen FM-Klassen. (Reichweiten-ident)
Es sind auch die Reichweiten in km angegeben.
So z.B für einen   1kW-Sender auf  550 kHz  45 km Reichweite,   auf 1550 
kHz nur noch 15 km  Reichweite    (zunehmende Dämpfung der Bodenwelle zu 
höheren Frequenzen)
===>  Map-Grafik auf Seite 29

Kurze Version:

eFM Kanaleinteilung:


Boa Noite!