Digital TV signal evaluation for functional tests

Verification process in digital television (DTV) pro- duction often includes a tuning and decoding check, which ensure that assembled devices are capable to reproduce audio and video. Poor test signals conditions, however, may cause device rejection, leading to losses of time and money for the manufacturer. This work proposes a real time DTV test signal monitoring and evaluation that assess signal conditions during tuning tests aiming to report if the associated check must be rerun. Tests, in a real manufacturing environment, showed that the proposed methodology is effective and revealed that only less than 40% of the rejected devices presented nonconformances.