With Samsung tv's connected to Stofa cable tv it is necessary to adjust the TV properly to receive digital encoded channels. If not done so, you are only able to receive analog encoded channels which is no fun when you are able to have better quality.

Tuning digital channels on Samsung TV, you need to set the following configuration on the tv and use manuel settings.

Frequency: 346 MHz (346000 kHz)
Network-ID: 0
Modulation: 64 QAM
Symbol rate: 6900 KS