Overview 
 The product according to the standard GB3836-2000, MT/T899-2000 design and manufacture of relevant content. The product gas and coal dust in a coal mine explosion hazard environments, through a core optical fiber can transmit video signals over long distances. The machine uses industrial-grade chips, all surface mount, to ensure high-quality environment in a variety of complex, long-term trouble-free operation. 
 Equipment, use of environmental conditions: 
 ? ambient temperature 0 ~ +40 ℃; 
 ? relative humidity ≤ 95% (+25 ℃); 
 ? atmospheric pressure 80 ~ 106kPa; 
 ? no significant vibration and impact areas; 
 ? gas and coal dust explosion hazard with the coal mine. 
 Features 
 Can convert the video signal optical signal transmission. 
 3 Specifications 
 1 power supply 
 Operating voltage: AC127V; 
 Input apparent power: 50 VA. 
 2 proof mark: Exd Ⅰ 
 3 Optical transmission between the ground Optical 
 Optical Interface Type: ST; 
 Wavelength: 1310nm; 
 Fiber mode: single mode; 
 Optical signal power (dBm): -8 ~ 0. 
 Maximum transmission distance: 15km (transmitter optical power:-8dBm ~ 0dBm; receiver sensitivity of-25dBm; using MGTS-4B type mine single-mode optical fiber, optical fiber contacts: 18, of which 8 hot-melt contacts the cold fusion point 6 , activities connection point 4). 
 4 video inputs 
 Number of channels: 8 
 Peak video signal: 1V (positive polarity, the whole television signal, 75Ω unbalanced load.) 
 5 Dimensions (L × W × H): 388 mm × 298 mm × 131 mm. , Shown in Figure 3-1; 
 6 Weight: about 20Kg.