The DT-212 is a DVB-T to DVB-T (COFDM) transmodulator. It has a direct COFDM input that can be tuned to any multiplex and ouput in the UHF band. They are agile in frequency and ouput level.
This module allows to regenerate the quality of the multiplex when received from a noisy source. It is also interesting to change the input channel to another channel with total quality preservation.