Introduction optical attenuator is used to attenuate the optical power of the device, it is mainly used for measuring optical system indicators, short-range communication system signal attenuation and system testing and other occasions. Optical Attenuator require low weight, small size, high accuracy, good stability, ease of use. It can be divided into fixed, variable grading, continuous adjustable several. Below are continuously adjustable attenuator working principle and structure diagram. Adjustable optical attenuator for optical measurement in general. Measuring the sensitivity of the optical receiver, it is usually in the optical receiver input, to adjust the size of the received optical power. Using optical attenuator, to keep the environment clean and dry when not in use to cover the protective cap. To move gently, non-collision. Performance parameters Technical Specifications: Instrument Type JW3303 can be attenuated wavelength range 1260 ~ 1650nm Fiber Type 9/125um singlemode fiber connector type FC / PC calibration wavelength range of 2.5 ~ 60dB attenuation 1310/1490/1550/1625 resolution 0.05dB insertion loss <2.5 dB Linearity ± 0.2dB ± 0.5dB Repeatability overall attenuation accuracy ± 0.8dB back reflection> 35dB (typical 40dB) +20 dB maximum allowable input 128 * 64 dot matrix display type black, white backlight Rechargeable battery 7.4V Power adapter 7 ~ 8.5V Operating Temperature 0 ~ 40 ℃ Storage Temperature -10 ~ 60 ℃ Humidity 0 ~ 85% (non-condensing) Weight 450g Other Description Applications: Telecommunication CATV engineering and maintenance engineering and maintenance cabling system optical device production and research of optical communication teaching and testing other optical engineering product features: rotating disk Step Attenuation: 0.05dB step size can be displayed with a relative or absolute attenuation attenuation Optional 10 minutes without operating automatic shutdown after shutdown, system memory before shutting down the amount of attenuation and the step size, and then boot the system back to the state before the transaction description shutdown EFT payments, payment and delivery.