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Group RDS : 2 version B
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PI code group type program type

 

This 2B group allows to transmit data of radiotext, with a maximum of 32 characters .

If this group is used, at least 6 groups 2B must be transmitted every 2 seconds.

Radio Text :

The last 5 data bits of block 2 are used for the radiotext data.

b4

A/B Flag

 b3 b2 b1 b0

A change of state (0-> 1 or conversely) of the bit b4 A/B Flag, allows to clear the current display to begin a new line of text.

The bits b3, b2, b1 and b0 allow to select the transmitted characters by determining the address of the characters contained in segments:

b3 b2 b1 b0 RadioText segment
0
0
0
0
1 2
0
0
0
1
3 4
0
0
1
0
5 6
0
0
1
1
7 8
0
1
0
0
9 10
0
1
0
1
11 12
0
1
1
0
13 14
0
1
1
1
15 16
1
0
0
0
17 18
1
0
0
1
19 20
1
0
1
0
21 22
1
0
1
1
23 24
1
1
0
0
25 26
1
1
0
1
27 28
1
1
1
0
29 30
1
1
1
1
31 32

Each line of text has to begin with the first character of address " 0000 ", up to the last segment used by the highest address sequentialy without character missing. Every message must be ended by the character " carriage return " 0D ( Hex) if the length of the message is lower than 64 characters.

A line feed " line feed " 0A ( Hex) can be used to indicate to the receiver a change of line.

The use of the group 2A is exclusive with the group 2A , the simultaneous use of these 2 groups is forbidden.

It is advised to transmit twice a message to avoid any problem of reception.

The address of the characters increments from the left to the right of the display.

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