9
RT
Radiotext:
This is a 64-character block of plain text that the
listener can select for visual display on the faceplate of the radio.
This function is generally not available on automobile receivers
for safety considerations, which has precipitated the frowned-upon
practice of scrolling the PS field instead. Most radios have limited
alphanumeric display capability, so the 64 characters march
across the front panel, much akin those annoying LED advertising
signs found in airport buses or fast food emporia. Like the
scrolling PS implementation, Radiotext can announce song titles
and performers, run special promotions or contests, or broadcast
sponsors messages.
TA
Traffic Announcement:
This is a
temporary
flag added to the RDS
data stream
only
as a traffic bulletin is being aired. Some RDS car
radios can be set to search for traffic bulletins among various TP
stations (see
TP
below) while tuned to a listener s preferred
program, or even while playing a tape or CD. As soon as any TP
station broadcasts a traffic bulletin, the receiver
temporarily
switches-over to receive it. When the bulletin is finished, the
receiver switches back to the original program, tape or CD.
TP
Traffic Program Identification:
The TP flag identifies the station as
one that routinely broadcasts traffic bulletins for motorists as part
of its normal, everyday programming. When the TP flag is
displayed on the receiver faceplate, the radio is searching for
traffic announcements. The radio keeps track of TP stations
offering this service to speed up the search-and-switch process.
