The TERRA OT501W A9872
optical transmitter is used for transmission of television signals via optical medium. It converts input satellite signals from a quatro LNB, and DTT (DVB-T) and radio (DAB and FM) signals (the terrestrial signals have to be combined by a triplexer) from a set of terrestrial antennas. The built-in WDM multiplexer transmits the two groups of signals separately, in the II transmission window (1310 nm) and III transmission window (1550 nm), which guarantees exceptional quality of the transmission. The optical output (FC/APC - Angled Physical Contact) of the OT501W A9872
transmitter provides optical signal at 6 dBm
level allowing for splitting and distribution of the signal even to 32 nodes (OR501W QUATRO + DVB-T A9877
or OR501MW QUAD + DVB-T A9875
receivers/converters) deployed in a radius up to 10 km, connected via single-mode fibers. The exact number of the connection points and the maximum distances from the signal source can be determined during the planning of optical power budget. Each input of the transmitter is equipped with automatic gain control (AGC)
ensuring signal stability (compensation of signal level fluctuation associated with changing weather conditions - rain, heavy clouds etc.). Consequently, the output optical signal has a constant modulation depth.