为了传递光缆信息,列宁格勒电子技术学院发明了光缆的衰减测量仪。而另一学院,即中央邮电研究院研制了光缆故障测位仪。这两种仪器由各自的学院进行小批量生产,并已装在光纤通信线路上试用,证明合乎各项技术要求。光缆衰减仪由两个分开的仪器单元,即用于测量光信号的发射机和显示被测光缆输出功率的接收机组成。通过一带有V形凹槽的可调接收装置,芯直径为50微米的光缆与发射机耦合。这种光衰减测量仪在光波长为850毫微米时,可测出0至65分贝范围内的衰减值;波长为960毫微米时,可测出0至45分贝范围内的衰减值。其测量精度在0至25分贝时为±0.25分贝;在25至 In order to transmit the cable information, Leningrad Institute of Electronics invented the cable attenuation meter. The other college, that is, the Central Research Institute of Posts and Telecommunications developed a cable fault locator. Both of these instruments are manufactured in small quantities by their respective institutes and have been installed on optical fiber communication lines for trial, demonstrating compliance with various technical requirements. The cable attenuation meter consists of two separate instrument units, a transmitter for measuring optical signals and a receiver for displaying the output power of the cable under test. An optical fiber with a core diameter of 50 micrometers is coupled to the transmitter via an adjustable receiving device with a V-shaped recess. The optical attenuation meter measures attenuation in the 0 to 65 dB range at a wavelength of 850 nm and attenuates in the 0 to 45 dB range at a wavelength of 960 nm. Its measurement accuracy is ± 0.25 dB at 0 to 25 dB; at 25 to