root@ubuntu:~# scan /usr/share/dvb/atsc/us-Cable-Standard-center-frequencies-QAM256
scanning /usr/share/dvb/atsc/us-Cable-Standard-center-frequencies-QAM256
using '/dev/dvb/adapter0/frontend0' and '/dev/dvb/adapter0/demux0'
>>> tune to: 57000000:QAM_256
WARNING: >>> tuning failed!!!
>>> tune to: 57000000:QAM_256 (tuning failed)
WARNING: >>> tuning failed!!!
>>> tune to: 63000000:QAM_256
WARNING: >>> tuning failed!!!
>>> tune to: 63000000:QAM_256 (tuning failed)
WARNING: >>> tuning failed!!!
>>> tune to: 69000000:QAM_256
WARNING: >>> tuning failed!!!
>>> tune to: 69000000:QAM_256 (tuning failed)
WARNING: >>> tuning failed!!!
>>> tune to: 79000000:QAM_256
WARNING: >>> tuning failed!!!
>>> tune to: 79000000:QAM_256 (tuning failed)
WARNING: >>> tuning failed!!!
>>> tune to: 85000000:QAM_256
WARNING: >>> tuning failed!!!
>>> tune to: 85000000:QAM_256 (tuning failed)