titan dvb-atsc-tools-1.0.6 # ./dtvsignal -q -dvb 0 35
using '/dev/dvb/adapter0/frontend0' and '/dev/dvb/adapter0/demux0'
setting frontend to QAM cable
tuning to 291000000 Hz
video pid 0x0021, audio pid 0x0024
dtvsignal ver 1.0.6 - by Jack Kelliher (c) 2002,2005,2006
channel = 35  freq = 291000000Hz table 291
channel = 35 freq = 291000000Hz
 30db       0%         25%         50%         75%        100%
Signal:     |     .     :     .     |     ._____:_____._____|
Signal: 000 .