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CP-850FX Service Manual
Europe R&D 11
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 checks if a CNI code is transmitted as part of the
teletext transmission ( Packet 8/30 format 1 and format 2). 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.
1.3.1 GENERAL CASE
Program
number
Group Skip
1
2 Group I
...
n
n+1
... Group II
m
m+1
... Group III
p
p+1
... Group IV 9
q
q+1
... not used 9
99
0
1.3.2 SPECIAL CASE
Program
number
Group Skip
1
... Group II
m
m+1
... Group III
p
p+1
... Group IV 9
q
q+1
... not used 9
99
0
Special case : Country selection = Others
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