Digital TV Universal Training System - The Trainer Universal Digital TV Receiver EU-850 is a didactic equipment oriented to the learning of the theoretical and practical contents about the operation of the digital television receivers (satellite, terrestrial and cable) as well as the basis and the processes related to the transmission, reception and distribution of the digital television (COFDM, QPSK and QAM). The equipment includes a 5"-TFT hi-res graphical display, that allows the visualisation of the digital channels tuned (and the analogue channels when terrestrial reception), and also offers all the features of a professional field strength meter.