With the continuous development of the optical communication industry, products such as optical cable splice boxes are constantly emerging in people's lives. It can be seen that this product has played an important role in the optical communication profession. To achieve better results in the use of this product, the most important thing is to choose high-quality materials. So how do you choose high-quality fiber optic cable splice boxes? Let's take a look together!
High quality fiber optic cable splice boxes enhance the quality of communication equipment such as fiber optic terminal boxes, while also providing users with a certain level of safety. Below we will learn how to select high-quality cables.
Firstly, we need to check the core wire: diameter - SYV cable is 0.78 to 0.8mm, SYWV cable is 1.0mm; Recently, a type of SYV75-5 cable with a core diameter of 1.0mm has emerged. The characteristic impedance of this optical cable joint box is definitely not 75 ohms and should not be used in the 75 ohm transmission system.
Then check the bonding force between the core wire and the insulation layer: cut the insulation layer diagonally, swing the core wire in the direction of peeling, and check if there is any bonding process material between the core wire and the insulation layer; Good cables have strong adhesion, but poor cable joints are not bonded. Longitudinal tensile test: Take one meter of cable, peel off the core wire layer by layer, and leave 10 centimeters long for the insulation layer, shielding layer, and outer sheath. The method is to hold the adjacent layers of the cable with both hands and pull in the opposite direction; A good cable usually cannot be pulled with force, while a poor cable can be easily pulled without much effort.
Next is the PVC sheath: the surface can be seen to have regular unevenness in the mesh inside, indicating good processing technology and no relative sliding, making it a good cable; The appearance is smooth, and there is no visible unevenness in the compressed mesh. The sheath feels loose when pinched by hand, which is inferior to the cable.