subject: Catv Coaxial Cable To Connect Common Problems And Solutions-catv, Coaxial Cable, Cable Tv - Hc [print this page] Cable TV Coaxial cable Construction or maintenance, due to cable length, long enough to pick up, usually with a double-pass connector (commonly known as tandem head) will be used to connect two cables, due to irregularities in the junction operation, signal failures common, often have the following Species:
First, inserting the cable F tandem head, the result of too much force to the spring series with the first Crush dislocation of the cable core wire and the spring connection is bad, especially the head of feeder cables could easily cause ignition caused by signal failure .
Second, cable joints leave no margin, and the joint position of any lien, lack of thermal expansion and contraction due to cables or external force F caused by loose head and cable, in a straight line of the circuit appears to joints can be easily neglect, failure often causes miscarriage of justice, even when found in joint margin because there is no cable connection to be re-done, of course, difficult.
Third cable is not enough margin or the margin over, lashing not solid. One approach is to remain only a small number of margin, so that coil radius is too small, especially because of tension cables -12 large, often appear first card F ring is ejected, from the head of the cable shield, resulting in deteriorating the low frequency signal ; the other is too much margin, disc with a dozen laps cable chaos, head shaking and was easy to wind throw.
Fourth joints are not sealed with waterproof tape, the head of water oxidation, increasing the signal level attenuation.
Light of the above, the connecting cable, as long as the following method is basically to eliminate the fault.
First cable joints should normally remain in the pole or the corner next to a convenient location such as maintenance, and a sufficient margin (depending on cable size is not less than the minimum bend radius, is generally set as 3 to 4 laps that is enough), if not reach the desired position, then reluctantly must sell more than cut cable, rather more than continue with the part of the cable a few meters.
Second cable F has to be carefully done carefully, the F head be aligned into series with the first spring when the chips gently pushed into, sure tightened into the normal force F after the first.
Third, you must use self-adhesive joint Rubber To take the style with semi-waterproof seal around the package to make, and then around its outer layer of PVC adhesive tape for protection layer to prevent the joints water.
4 is set into the ring over cable, cable to bend not less than the minimum bend radius, and then tied with iron bar into a bar line, from the series with the first ends in about 5cm, all banding together must, this can so that the arc of joints with the plate to keep more than one cable bend, F head will not pop up because of cable tension and, finally tied up the remaining cable loop pole line in the frame or wall on the swing can not be fixed well.
