RF coaxial cable detection method
The cross section of the standard RF cable is very round. The outer shield of the cable and the aluminum foil are attached to the outer surface of the insulating medium. The rounder the outer surface of the medium, the smaller the gap between the aluminum foil and its outer surface, and the smaller the gap is, the larger the gap is. Practice has proved that the smaller the gap, the better the performance of the cable. In addition, the large gap air easily invades the shielding layer and affects the service life of the cable.
2. Detect the consistency of the insulating medium of the coaxial cable
The fluctuation of the dielectric diameter of the coaxial cable mainly affects the echo coefficient of the cable. This inspection can cut out the insulation medium of a section of cable, and carefully check the outer diameter of each point with a micrometer to see if it is consistent.
3. Detecting the braided mesh of the coaxial cable
The braided cable of the coaxial cable plays an important role in the shielding performance of the coaxial cable, and is also the return line of the power supply in the centralized power supply cable TV line. Therefore, the quality inspection of the coaxial cable must check whether the woven mesh is tight and flat. Cut off the outer sheath of the coaxial cable, cut a small section of the coaxial cable woven mesh, and identify the number of woven mesh. If the value of the specified index is qualified, it is less than the given index. In addition, a single woven wire is measured with a spiral micrometer. At the same price, the coarser the wire diameter, the better the quality.
4, check the quality of aluminum foil
The important shielding function in coaxial cable is aluminum foil, which plays an important role in preventing external open circuit signal interference and cable TV signal leakage. Therefore, the quality of aluminum foil should be checked for new coaxial cable. First, cut off the jacket layer and observe whether the surface of the braided wire and aluminum foil layer maintains good luster. Secondly, take a cable and tightly wrap it around the small metal shaft, straighten and reverse the winding, repeat it several times, then cut it again. The cable sheath layer can be seen whether the aluminum foil is cracked or not. A small piece of aluminum foil can be cut and twisted repeatedly in the hand. After repeated twisting and stretching, it is not broken, and the toughness is qualified, otherwise it is a defective product.
5, check the tightness of the outer sheath
The high-quality coaxial cable outer sheath is tightly packed, which can reduce the gap in the shielding layer, prevent the air from entering and cause oxidation, prevent the relative sliding of the shielding layer from causing the electrical performance to drift, but the tightness of the extrusion will cause the inconvenience of the stripping. Increase the difficulty of construction. The inspection method is to take a 1 m long cable and peel off the sheath at the end to force the core to be pulled out.
6, observe the cable in a ring shape
Cable looping is not only an aesthetic issue, but also a quality issue. The cable is flattened in a circle, and each cable is kept on the same concentric plane. The cable and the cable are in contact with each other in parallel with each other in an arc, which can reduce the mutual stress of the cable and the stack is not easily deformed, so the quality of the cable is accepted. This should not be taken lightly.
The printer cable is the cable used to connect the printer and the computer. Generally divided into two types: USB printing cable and parallel port printing cable.
Generally, one side is a USB port to connect to a computer, and the other side is a PIN5 port to connect to a printer. The transmission speed is fast, and it can be hot-swapped. After connecting, the printer driver must be installed to print from the computer normally.
Parallel port print line:
Refers to the printing line that uses parallel transmission to transmit data. Because this interface is easily damaged and the transmission speed is slow, it is basically replaced by the USB interface.
Serial print line:
The serial port, also known as the serial communication interface (usually referred to as the COM interface), is an extended interface using serial communication.
A printer is one of the output devices of a computer and is used to print the results of computer processing on related media. There are three indicators to measure the quality of a printer: print resolution, print speed and noise. There are many types of printers. According to whether the printing element has a hitting action on the paper, it is divided into impact printers and non-impact printers. According to the structure of printing characters, it is divided into full-shaped character printers and dot-matrix character printers. According to the way a line of words is formed on paper, there are serial printers and line printers. According to the technology used, it is divided into cylindrical, spherical, inkjet, thermal, laser, electrostatic, magnetic, light-emitting diode and other printers.
In general, the wiring harness industry is a good industry, because Wire harnesses are widely used in many fields, whether it is industrial, medical, military, communications/automotive, or computers, machines, etc. The benefits of the company are very general. How to position, what kind of wiring harness to make, and how to provide services with the whole machine, all test the ability of the factory. For this reason, Suzhou Kable-X has formulated a set of implementation methods for fast delivery and good after-sales service.
In addition to Printer Wiring Harness, and Elevator Unit Wire Harness, we also provide Medical Power Wire Harness and Vehicle Cable Assembly for these companies.
Printer Wiring Harness,3D Printer Wiring Harness,Printer Cable,Usb Cord For Printer
Kable-X Technology (Suzhou) Co., Ltd , https://www.kable-x-tech.com