FMUSER INTERNATIONAL GROUP INC.
广州市汉婷生物技术开发有限公司
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Dynamic PS Text
Standard RDS enabled receiver disposes of 8-character LCD display but we usually need to show pile of information
and commercials. So small display on the one hand and so much demands on the other hand. The RDS-C solves it
by unique system of text messages showing. Although Radiotext service is defined in the RDS standard, this service
is not present some receivers (especially older car radios) and has some other limitations. According to the
broadcasters needs, the PS service - one of the basic RDS services supported by all receivers - can be usually used
to give sequential information. This has become known as ‘Dynamic PS’ or ‘Scrolling PS’.
Note: Using the dynamic PS is restricted in some countries and it's fully prohibited by the RDS standard!
The manufacturer is not responsible for incompetent use of this feature. Some receivers may not display the dynamic
PS properly for reasons that lie entirely on their side. Never provide traffic information inside the Dynamic PS text!
The RDS-C encoder offers advanced implementation of the Dynamic PS service. Basic text message length is
up to 255 characters (mode independent). Two varieties of the Dynamic PS are present: Dynamic PS 1 (DPS1)
and Dynamic PS 2 (DPS2). Both varieties are configurable independently from each other.
Basic configurable parameters are:
Text content/text source
Display mode
Label period or scrolling speed
Number of transmissions
Example of full dynamic PS use:
The number of transmissions is specified for each Dynamic PS text. The Static PS period (delay between text loops)
specifies the time between two repeats of the Dynamic PS text loops. Default PS is displayed during this time.
Four display modes are provided. The mode is switchable ‘on the fly’, without need to re-enter the text message.
Mode 0 - Scrolling by 8 characters
Mode 1 - Scrolling by 1 character
Mode 2 - Word alignment scrolling
Mode 3 - Scrolling by 1 character, text separated by spaces at begin and end
Additional differences exist between Dynamic PS 1 and Dynamic PS 2 (see sections 11.2 and 11.9). In general the
DPS1 should be used if on-line connection is available between your studio and the RDS encoder while the DPS2
should be used if the RDS encoder is placed on a site without on-line connection providing set of fixed messages.
