HHTX-1310 1310nm Transmitter with AGC. This series transmitter take the high linearity, the low noise of the distribution feedback laser (the DFB laser ),it greatly in transmittion,low in non-linearity distortion. Adopt APC, ATC technology, achieved the transmitter output optical powers stability. It offers AGC/MGC level adjustment functions.Under the AGC status,when the input RF signal changes in allowable range(±5dBmV). Add to lasers modulation level basicly invariable.In order to keep the system of CNR, CTB and CSO three big targets for a long-term stability .