1 Introduction
2 General
2.6.1 Non-controlled condition
2.6.2 Non-precision offset
2.6.3 Precision offset (see Annex 4 for the
case of 625-line systems)
3 Synchronized
carrier operation
4 Further studies
1 Protection from
co-channel interference
1.1 Carriers separated
by less than 1 000 Hz, non-controlled systems having the same or a different line‑standard
1.2 Carriers
separated by parts of the line frequency ( fline), systems having the same line‑standard, non‑precision
offset (see Table 1)
2 Protection from adjacent-channel interference
2.1 Protection from
lower adjacent-channel interference, VHF and UHF bands
2.2 Protection from
upper adjacent-channel interference, VHF and UHF bands
3 Protection from
image-channel interference
4 Protection from
overlapping channel interference
4.1 Protection ratios
for vision signals interfered with by terrestrial digital audio broadcasting (T‑DAB)
5 Television signal
affected by data signals
1 Protection from
co-channel interference
1.1 Carriers
separated by less than 1 000 Hz, non-controlled systems having the same or a different line‑standard
1.2 Carriers
separated by multiples of a twelfth of the line frequency up to about ±36/12 fline (about ±50 kHz)
2 Protection from
adjacent-channel interference
2.1 Protection from
lower adjacent-channel interference
2.1.1 VHF bands
2.1.2 UHF bands
2.2 Protection from upper
adjacent-channel interference, VHF and UHF bands
3 Protection from
image-channel interference
4 Protection from
overlapping channel interference
4.1 Protection ratios
for vision signals interfered with by terrestrial digital audio broadcasting (T‑DAB)
5 Television signal
affected by data signals
1 Introduction
2 Normalized
precision offset between 0/12 and 12/12 fline
2.1 Luminance range
for all 625-line systems:
2.2 Chrominance range
only for PAL and SECAM systems
2.2.1 PAL systems
2.2.2 SECAM systems
3 Computation of
operational offset frequencies in a network with transmitter triplets
3.1 Example