Kexun cable tells everyone how to detect coaxial cable

The section of the standard coaxial cable is very round. The outer conductor of the cable and the aluminum mooring are attached to the outer surface of the insulating medium.

1, check the degree of insulation medium

The section of the standard coaxial cable is very round. The outer conductor of the cable and the aluminum mooring are attached to the outer surface of the insulating medium. The more rounded the outer surface of the medium, the smaller the gap between the aluminum foil and its outer surface, and the greater the gap, the greater the gap. Practice has proved that the smaller the gap is, the better the performance of the cable is. In addition, the large gap air easily invades the shielding layer and affects the service life of the cable.

2, measuring the consistency of coaxial cable insulation medium

Coaxial cable edge diameter fluctuations of the media affect the cable's echo coefficient, this inspection can be broken out a section of the cable insulation medium, with a micrometer carefully check the diameter of each point to see if it is the same.

3, measuring the coaxial cable weaving network

The coaxial cable's textile cable plays an important role in the shielding performance of the coaxial cable, and it is also the return line of the power supply in the centralized power supply cable television line. Therefore, the quality inspection of the coaxial cable must check whether the textile network is completely smooth. Cut open the outer sheath of the coaxial cable, cut a small section of the coaxial cable weaving net, determine the number of braided nets, and if qualified with the given index value, pass the survey on the single spiral cable micrometer with a spiral micrometer. At the same price, the coarser the wire diameter, the better.

4, check the quality of aluminum foil

Aluminium foil plays an important role in the shielding of coaxial cables, and it plays an important role in avoiding the confusion of external open-circuit signal interference and cable TV signals. Therefore, the quality of aluminum foil should be checked for the new coaxial cable. First, cut open the jacket layer, observe whether the surface of the braided network cable and the aluminum foil layer maintain good gloss; secondly, take a section of cable, tightly wind around the small metal shaft, straighten and turn in the opposite direction, repeat several times, and then cut again. The cable jacket layer can see whether the aluminum foil has a broken image, and can also cut out a small amount of aluminum foil repeatedly rubbing and stretching in the hand. After repeated rubbing and stretching, it still has not broken, and has the toughness as a qualified product, otherwise it is a defective product. .

5, check the jacket tightness

The high-quality coaxial cable outer sheath is tightly packed, which can reduce the gap in the shield layer, avoid the air from entering and cause oxidation, avoiding the relative sliding of the shield layer and causing the electrical property to drift, but the squeeze too tight can cause the inconvenience of stripping the head. , increase the difficulty of construction. Check method is to take a 1m long cable, remove the cover at the end, to force the core can not be pulled out.

6, check the cable loop shape

Cable looping is not only an aesthetic issue, but also a quality issue. The cables are formed in a circle and all the cables are kept in the same concentric plane. The cables and the cables are in contact with each other in a circular arc parallel to each other, which can reduce the mutual stress of the cables. The stack is not easy to deform and break, so this is not acceptable when the cable quality is accepted. May be lighthearted.

The above is the information cable to everyone to share how to detect coaxial cable? I hope to be helpful!