TLD7002A Handheld Optical ( Light) Source is smart microprocessor-controlled intelligent Handheld Laser source. The Optical laser source can be used to test the usual single-mode optical fiber connector loss a single-mode fiber-optic network, LAN, FDDI, ATM , FTTH fiber optic systems, It also can test the telecommunications networks, CATV systems which need large dynamic range test system maintenance. The handheld stable source with the international advanced level in the micro-processing hardware , software technology , microelectronic technology, and surface mount ( SMT) technology provides its users with high performance, high reliability, which are the best performance at home and the most practical appearance of the light source. With the current international advanced level, handheld light source provides continuous or modulated light output ( 2 KHz) in the state of the two working conditions Features u Larger and more stable output power comparable to desktop source. Stabilized Output u Using the Single key to switch the wavelength is flexible and convenient. High Reliability u Universal interface has three types of adapter: FC / SC / ST. Easy to operate u Small size/ light weight/ high reliability. Flexibly switch the wavelength u Battery-powered, convenient field work. Omnipotence joint u Backlight at night.