2003 Cadillac CTS Owner's Manual - Page 238

Using RDS Your audio system is equipped with Radio Data Systems (RDS). RDS features are available for use only on FM stations that broadcast RDS information. Using this system, the radio can: 1. receive announcements concerning local and national emergencies, 2. seek to stations with traffic announcements, 3. display messages from radio stations and 4. search for a stronger station when a station is too weak for listening. If you are tuned to a station broadcasting RDS information, the station's call letters and program service name will replace the station's frequency on the display. The program type and program type name may be the same or different. If the radio is tuned to a station that is not broadcasting RDS information, the station's frequency will remain on the display. With RDS the radio can search for a stronger station in the network when a station gets too weak for listening if alternate frequency is on. RDS Messages ALERT: Alert warns of local and national emergencies. When an alert announcement comes on the current radio station or a related network station, ALERT will appear on the display. You will hear the announcement, even if the volume is muted or a cassette tape or compact disc is playing. If the cassette tape or compact disc player was being used, the tape or compact disc will stay in the player and resume play at the point where it stopped when the announcement has ended. You will not be able to turn off alert announcements. If the radio tunes to a related network station for the announcement, it will return to the original station when the announcement is finished. The radio uses TA volume for alert announcements. To increase or to decrease volume, turn the VOL knob. The volume can not be turned completely down or off. 3-17