Editing Radio Data System (section)

==== Group type 2 – Radio text ====
{| class="wikitable"
|-
|RadioText Version A 
| colspan="2" |Block 1 : 26bits
| colspan="10" |Block 2 : 26bits
| colspan="3" |Block 3 : 26bits
| colspan="3" |Block 4 : 26bits
|-
|Block Internal
|PI Code
|Check + Offset A
|GTYPE
|B0
|TP
|PTY
|A/B
|C3
|C2
|C1
|C0
|Check + Offset B
|Character A
|Character B
|Check + Offset C
|Character C
|Character D
|Check + Offset D
|-
|Bit Value
|16 bits
|
|0010
|0
|X
|XXXXX
|X
|X
|X
|X
|X
|
|8 bits char
|8 bits char
|
|8 bits char
|8 bits char
|
|}
{| class="wikitable"
|-
|RadioText Version B 
| colspan="2" |Block 1 : 26bits
| colspan="10" |Block 2 : 26bits
| colspan="2" |Block 3 : 26bits
| colspan="3" |Block 4 : 26bits
|-
|Block Internal
|PI Code
|Check + Offset A
|GTYPE
|B0
|TP
|PTY
|A/B
|C3
|C2
|C1
|C0
|Check + Offset B
|PI Code
|Check + Offset C'
|Character C
|Character D
|Check + Offset D
|-
|Bit Value
|16 bits
|
|0010
|1
|X
|XXXXX
|X
|X
|X
|X
|X
|
|16 bits
|
|8 bits char
|8 bits char
|
|}

As we have already described previous fields above, these dot points below show just the application specific fields.
* A/B : Text A/B flag is used to detect if a screen clear is requested.
* C3 to C0 : Is the text segment offset value
The station name and decoder identification code is sent progressively over 4 groups, where the offset is defined by bit C1 and C0.
{| class="wikitable"
| colspan="4" |Text Segment
|
| colspan="4" |Version A
| colspan="4" |Version B
|-
|C3
|C2
|C1
|C0
|Offset
|Char A
|Char B
|Char C
|Char D
|Char A
|Char B
|Char C
|Char D
|-
|0
|0
|0
|0
|0
|1
|2
|3
|4
| colspan="2" rowspan="5" |Version B Specifies 
That This Field Is For

Program Identification

Code
|1
|2
|-
|0
|0
|0
|1
|1
|5
|6
|7
|8
|3
|4
|-
|0
|0
|1
|0
|2
|9
|10
|11
|12
|5
|6
|-
|...
|...
|...
|...
|etc...
|...
|...
|...
|...
|...
|...
|-
|1
|1
|1
|1
|15
|61
|62
|63
|64
|31
|32
|}