Complex sentence: Most of the time each channel has an independent broadcasting with every kind of program, but signals of channels 2,4, and 6 are linked together weekday mornings for broadcasting news and general interest programs.
Split into simpler sentences: Most of the time each channel has an independent broadcasting with every kind of programs. But, signals of channels 2,4 and 6 are linked together in the morning during weekdays for broadcasting news and general interest programs.