1, check the insulation media uniformity standard
The cross-section of the coaxial cable is rounded, and the outer conductor of the cable is attached to the outer surface of the insulating medium. The outer surface of the media is more rounded, the smaller the gap between the foil and its appearance, the less the gap is. Practice has proved that the smaller the gap the better the performance of the cable, in addition, large gap air easily penetrate the shield and affect the service life of the cable.
2, measured coaxial cable insulation medium consistency
Coaxial cable edge of the media diameter fluctuations affect the cable echo coefficient, the inspection can be cut out a cable insulation medium, with a micrometer carefully check the diameter of the points to see if they are consistent.
3, measured coaxial cable braid
Coaxial cable of the textile network cable coaxial power of the shielding performance plays an important role, but also in the centralized power supply cable TV line or the power of the return line, so the coaxial cable quality testing must be tightly on the textile network to observe, Is cut open coaxial cable jacket, cut a small coaxial cable braid, the number of woven mesh to identify, if the value of the indicators and consistent with the qualified, and a single textile network with a spiral micrometer to measure, At the same price, the more coarse the better the wire diameter.
4, check the quality of aluminum foil
Coaxial cable plays an important role in shielding aluminum foil, it is to prevent external open signal interference and cable television signal transmission has an important role, so the new coaxial power should be checked the quality of aluminum foil. First, cut open the jacket layer, observe the braided cable and aluminum foil layer surface to maintain a good luster; followed by take a cable, tightly around the metal shaft, straight to reverse rotation, repeated several times, and then cut off Cable sheath layer to see whether the phenomenon of aluminum foil break, but also a small section of aluminum foil in the hands of repeated rubbing and stretching, after repeated rubbing and stretching has not yet broken, with a certain toughness for the co-vomiting, The
5, check the outer layer of squeeze tightness
High-quality coaxial cable jacket are tightly packed, which can narrow the gap within the shield to prevent the air into the oxidation caused by the relative sliding to prevent the shielding caused by electrical performance drift, but squeeze too tight will cause the head inconvenience , Increase the difficulty of construction. Check the method is to take 1m long cable, in the end of the protective layer, to force the core can not be pulled out for the appropriate.
6, check the cable into a circle shape
The cable is not only a beautiful problem. But also quality problems. The cable is formed in a circle and the cables are kept on the same concentric plane. The parallel contact between the cable and the cable in parallel can reduce the cable's mutual force and the stacking is not easily deformed. Therefore, it can not be taken lightly in the acceptance of the cable quality The