Twisted pair cable twisted around should meet the requirements

To reduce interference signals, twisted pair cable each wire pair is composed of two insulated copper wires twisted around each other together, and the same cable on different lines with different degrees of twist around (that is twisted coil how many there). Meanwhile, the standard vga to hdmi cable twisted pair cable wire pair is twisted counterclockwise conducted. However, some non-formal cable manufacturers, but there are many problems: ① In order to simplify the manufacturing process, the cable twisted around all pairs of the same density; ② line on the two insulated wires twisted around the density does not meet the technical requirements; ③ wire pair twisting direction does not meet the requirements. If there are more problems will cause near-end crosstalk twisted pair (UTP refers to the degree of signal interference between the two lines on), so that the transmission distance below standard. Twisted-pair twisted around degree in production has a more stringent standard, the actual purchase, in the case of a conditional number of professional mini displayport cable equipment available to measure, but the average user can only be observed with the naked eye. It should be noted that five UTP twisted around on the degree of midline than three dense, UTP than five secret. In addition to the two insulated copper wires twisted wire pairs according to requirements of the composition were twisted around the outside, between the standard UTP cable pairs must be twisted counterclockwise. Otherwise it will cause the cable resistance does not match, limiting the transmission distance. This is the average user rarely noticed. About the five twisted pair cables twisted degree and other relevant parameters, the interested reader may consult TIA / EIA568A (TIA / EIA 568 cabling standard is ANSI enacted in 1996, provides information on the basis of the standard network cabling Content facilities, including cables, connectors and other equipment. letter "A" is represented as IBM cabling standards, and AT & T said the letter "B".) specified in.