Last Updated: Wednesday, 8 June 2022 By: Steve Warner

Packet 30 - Broadcasting Services Data Packet & PDC

It contains a 20 byte string that has the channels name stored within it, this how every is transmitted using 8 bits so to display the text properly it is necessary to and the received value with 127.

BDSP 8/30 Format 1

BDSP 8/30 Format 2

Dedicated VPS line

Bits 0 & 1 are used to specify the type of transmission sound

00 Unknown
01 Mono
10 Stereo
11 Dual

Example Packet 30 Capture - 10 August 1997

BBC1 100 48 - 11:35
 0 21 21 234 234 234 94 95 246 4 6 22 89 51 67 51 84 229 115 244 32 194 194 67 49 32 67 69 69 70 193 88 32 32 32 32 32 32 32 32
 0 0 0 15 15 15 3 3 13 0 1 1 2 5 1 5 0 12 5 12 4 9 9 1 4 4 1 0 0 1 8 2 4 4 4 4 4 4 4 4
 55êêê^_ö$&6Y3C3Tåsô@ÂÂC1@CEEFÁX@@@@@@@@
 55jjj^_v$&6Y3C3Test@BBC1@CEEFAX@@@@@@@@

BB2 100 48 - 11:35
 0 21 21 234 234 233 94 69 127 4 6 22 89 51 58 89 84 237 115 244 32 194 194 67 50 32 67 69 69 78 193 88 32 32 32 32 32 32 32 32
 0 0 0 15 15 14 3 0 7 0 1 1 2 5 7 2 0 14 5 12 4 9 9 1 5 4 1 0 0 3 8 2 4 4 4 4 4 4 4 4
 55êêé^E&127;$&6Y3:YTísô@ÂÂC2@CEENÁX@@@@@@@@
 55jji^E&127;$&6Y3:YTmst@BBC2@CEENAX@@@@@@@@

Carlton 100 48 - 11:09
 0 21 21 234 234 234 94 19 123 133 6 22 89 51 25 55 193 84 79 205 67 193 82 76 84 79 206 32 84 69 76 69 214 73 211 73 79 206 32 32
 0 0 0 15 15 15 3 1 7 8 1 1 2 5 2 5 8 0 3 10 1 8 1 2 0 3 11 4 0 0 2 0 9 2 9 2 3 11 4 4
 55êêê^3{…&6Y397ÁTOÍCÁRLTOÎ@TELEÖIÓIOÎ@@
 55jjj^3{&6Y397ATOMCARLTON@TELEVISION@@

Meridian 100 48 - 11:09
 0 21 21 234 234 202 94 19 123 133 6 22 89 51 68 38 193 84 79 205 205 229 242 233 100 233 97 110 32 194 242 239 97 100 227 97 115 244 32 32
 0 0 0 15 15 11 3 1 7 8 1 1 2 5 0 5 8 0 3 10 10 12 13 14 4 14 4 7 4 9 13 15 4 4 13 4 5 12 4 4
 55êêÊ^3{…&6Y3D&ÁTOÍÍåòédéan@Âòïadãasô@@
 55jjJ^3{&6Y3D&ATOMMeridian@Broadcast@@

Channel 4 100 48 - 11:30
 0 21 21 234 234 234 94 63 139 129 6 22 89 52 56 54 100 21 21 21 67 104 97 110 110 229 236 32 52 32 84 229 236 229 118 233 115 233 239 110
 0 0 0 15 15 15 3 7 11 8 1 1 2 4 6 5 4 0 0 0 1 6 4 7 7 12 14 4 4 4 0 12 14 12 5 14 5 14 15 7
 55êêê^?‹&6Y486d555Channåì@4@Tåìåvéséïn
 55jjj^?
&6Y486d555Channel@4@Television