The TLM-1310 downstream optical transmitter supports 1.2 GHz band and the DOCSIS 3.1 standard. The output optical power is from +6 dBm to +15 dBm available. It can be used for optical fiber transmission of downstream analog TV signals, digital television signals and CMTS data signals in HFC network. Two-way input signals with high-isolation for a variety of broadcast and insertion applications. It has patented pre-distortion circuit, high CNR and low distortion.