The DT-620 is an optical receiver that converts optical input signals into RF for their transmission over a distribution network.
In order to travel for long distances the RF signal was previously converted into optical by the DT-610. Once at the other end of the link the DT-620 converts it again to RF thus recovering the original signal. The system is optimised to work with DVB-T and DVB-C channels.
This module is suitable for optical links of up to 40 km (depending on the number of channels). The optical input supports wavelengths from 1100 to 1600 nm.