The construction of CATV cannot be finished in one time. As the users increasing, People always stretch the Optical fiber for several kilometers or more on the base of the former Optical nodes network. The usual solution is adding higher Optical power to these nodes; or in order to save the cost, making passive distribution on previous nodes directly. But the receive power on these two nodes will be low.
How to maintain the index for the new-added nodes but not by changing or enlarging the Optical power and its net structure. Adopt Guangtai9982, 9984 super low Optical power receive bi-directional receiver can solve the problem economically and efficiently.
Huatai 9982(two output) Optical receiver adopt advanced GaAs HBT ic technology, then make the noisy power lower. When the receiving power reaching -6dBm, system CNR maintain above 50dB.