... .Product description 1. FWT-1550EC Externally Modulated Optical Transmitter adopts narrow line width, low noise ... 2×5 ,2x6,2x7Return loss(dB)≥50 Optical fiber connector SC/APCOptional SC/APC,FC/APCRF ... by laser chirp for adopting 1550nm direct modulated optical transmitter.Ordering informationFWT-1550EC -1×5 (one ... two outputs, ≥7dBm) Externally Modulated 1550nm fiber optical TV transmitter