[Top][All Lists]
[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
Re: [Discuss-gnuradio] FM SCA
From: |
Magne Mæhre |
Subject: |
Re: [Discuss-gnuradio] FM SCA |
Date: |
Sun, 24 Feb 2002 13:48:40 +0100 |
User-agent: |
Mutt/1.3.27i |
>>>>>>>>>>>> Eric Blossom wrote (2002-02-24 02:23:42):
>
> What's RDS?
RDS is the Radio Data System. It's a data sub-carrier (on 57kHz IIRC)
with a set of services. A couple of these are:
* Telling your radio what station you're listening to (so you can get
the station ID up in your display)
* Telling your radio which other transmitters in the area transmitting
the same program. This is nice if you're in a car, so you don't have
to re-tune. For instance, I can tune in to one national broadcaster,
and drive through the entire country (3000 km) without touching the
radio.
* Information about what type of program you're listening to. Typically
you can then tell your receiver to "get me some jazz station".
* Automatic break-in to whatever you're listening to when there is a
traffic announcement.
* DGPS. In Norway, correction data is transmitted with RDS on every
transmitter that broadcasts one of the national programs.
* Nuclear hazard warnings. In Sweden, there is (was?) a system that
if one of the nuclear power plants had an accident, the neighbours
were alerted by a special RDS message.
....and I'm sure there are several more uses..
RDS is an EBU standard (European Broadcasting Union).
--Magne