Service Manual - Cenatel

1-3 ATSS sorting method
The TV set sweeps all the TV bands from beginning of VHF to end of UHF. The TV controlling software for each
program checks if a VPS CNI code is transmitted ( this system exists for German, Swiss and Austrian transmissions).
If no VPS CNI code is found, then the system check if a CNI code is transmitted as part of the teletext transmission
( Packet 8/30 format 1 ). If such a code ( VPS or teletext ) is found and if this code is in the ATSS list, the program is
automatically named.
If the transmission does not have VPS CNI, and no teletext service is available, then there is no possibility of the
program being automatically named.
The programs found are then sorted in 4 groups :
Group I : It contains all the programs from the selected country and named by the TV controlling software. Within this
group the sorting order is fixed by the ATSS list.
Group II : It contains all the programs with a strong signal strength which are not listed in group I.
Group III : It contains all the programs with a weak signal strength which are not listed in group I.
Group IV : If two or more programs with the same code are found, only the strongest ( or if they have the same level
the one with the lowest frequency) is listed in group I, II or III. The others are listed in group IV.
Program
number
1
Group Skip
2
...
n
n+1
Group I
...
m
m+1
Group II
...
p
p+1
Group III
...
q
q+1
Group IV
....
99
0
not used
9
Program
number
1
Group Skip
...
m
m+1
Group II
...
p
p+1
Group III
...
q
q+1
Group IV
....
99
0
not used
Special case : Country selection = Others
Special case : France
Note : If two programs with the same name but a different code are found these two programs are listed in
group I, II or III ( e.g. Regional program SW3 in Germany ).