[EAS] RDS...was Message Flooding

[Mike McCarthy]

Otto,

I know that route...I lived in Quincy for a spell...  different story...

You're mixing apples and oranges. You're also citing an extreme exmaple 
of RDS (or any RF) system limitations on any given station.  I 
apprecaite the main audio channel as being the primary delivery method.  
But it need not be the only method of delivery or relay.

My point presumes three things.

1) EAS has migrated in part to such a background methodology; and
2) FCC has made that aspect legal with both industry and consumer buying 
in to the concept; and
3) AM's will have a different embedded system.  Such as a slow/low baud 
system below the audio passband of stations not sending IBOC. 10 baud is 
plenty to send the header and eom three times in a minute.  even in the 
nastiest of conditions.

With the large number of stations, LPFM's and translators, it would seem 
prudent to utilize the total infrastructure already built up in such a 
manner.

I'm not saying it's ideal or viable given the industy's midnset. Rather, 
a talking point to start a dialog on possibilities.

MM

On 9/28/2013 4:38 PM, Otto, Ken wrote:
> R D S only works on R D S equipped radios. And it only works within a certain distance from the transmitter since this subcarrier is not sent at the same amplitude as the primary modulation of the fm transmission (the L+R mono signal).
>
> If I am driving from Saint Louis, MO after renting a car from the airport listening to my favorite station I am loosing the RDS signal before I lose the stereo signal from that station. Then I would lose Emergency Alerts if we discontinued the very reliable existing EAS system which works in the main audio.
>
> Experience based on a trip from St. Louis, MO to Quincy, IL.
>