First of all, let's understand what is a typical cable impedance? The most typical impedance values used for RF coaxial cables are 50 ohms and 75 ohms. The 50 ohm coaxial cable is probably the most common in use, generally used in radio transmitter receivers, laboratory equipment, Ethernet and...

First of all, the characteristic impedance mentioned in the title is determined by the ratio of the diameter of the outer conductor to the inner conductor of the coaxial cable and the dielectric constant of the insulating medium between the two conductors. Because radio frequency energy is...

Cable, in fact, is a kind of electrical energy or signal transmission device, usually composed of several or several sets of wires, which is mainly used to transmit electricity, transmit information and realize electromagnetic energy conversion of a large class of electrical products. Especially...

The maximum transmission distance of a single segment is 100 meters. The transmission frequency of Category 6 cable is from 1MHz to 250MHz, and the comprehensive attenuation to crosstalk ratio of Category 6 cabling system should have a large margin at 200MHz, providing twice the bandwidth of...

Femtosecond testing found that the structural components of wire and cable products can be generally divided into four main structural components: conductor, insulating layer, shield, and protective layer, as well as filler and tension bearing components. (1) Wire: The most basic and essential...

Bare wire and bare conductor products The main characteristics of this type of products are: pure conductor metal, no insulation and sheath layer. This kind of wire can be used as a conductive wire, can also be used as electrical appliances and other equipment components, etc., its conductivity,...

In 1982, the former International Radio Advisory Committee (CCIR), based on the agency proposals of the European Broadcasting Union (EBU) and the American Society of Motion Picture and Television Engineers (SMPTE), issued CCIR Recommendation 601, which unifies the digitization parameters of two...

1. Power system The wire and cable products used in the power system mainly include overhead bare wires, busbars (busbars), power cables (plastic cables, oil-paper power cables (basically replaced by plastic power cables), rubber cables, overhead insulated cables), branch cables (replacing part...

The maximum transmission rate [1] refers to the maximum transmission rate that a MODEM can theoretically achieve, that is, the amount of data transmitted per second, in bps (bit per second). Here, it mainly refers to the dial-up connection speed, i.e. the data transmission rate from the server...

One. Mechanical damage Because the heavy object smashes the cable, the excavator accidentally injured the cable, the cable is bent over the ambassador insulation injury during laying, the cable is severely squeezed during shipment and the insulation and protective layer are damaged, because the...

Look at the surface The technical engineer said that the insulating outer layer of a regular wire is soft and smooth, with uniform color. Several items on the product certificate are printed on its surface, such as: trademark, model and specification, rated voltage, executive standard, factory...

1) Class I line (CAT1): The maximum frequency bandwidth of the cable is 750kHZ, which is used for alarm systems or only for voice transmission (Class I standards are mainly used for telephone cables before the early 1980s), and not for data transmission. 2) Class II line (CAT2): The maximum...

SDI interface is a digital component serial interface and a digital video interface standard. At present, SDI interface is widely used in the camera industry. From the era of standard definition to high-definition, and then to ultra-high-definition 4K, the resolution has increased by four times...

1. Selection of wire and cable models (1) When selecting wires and cables, consider the use, laying conditions and safety; (2) According to different uses: power cables, overhead insulated cables, control cables, etc. can be selected; (3) According to different laying conditions: general plastic...

The first type of conductor is solid conductor, that is, the conductor is composed of a single conductor, including circular wire and sector wire. For large cross-section circular conductor core, in order to reduce skin effect, sometimes four and five segments are used to divide the core, and...

Super Cat5 and 6 network cables Unshielded super five network cable (CAT5E): no skeleton in the middle, wire diameter 0.51mm; The transmission bandwidth is 100MHz, which is used for voice transmission and data transmission with a maximum transmission rate of 100Mbps, and supports 1000Mbps...

Cable material is a particle prepared by mixing, kneading and extruding PVC as the base resin, adding stabilizer, plasticizer, inorganic fillers, additives, lubricants and other additives such as calcium carbonate. PVC can be prepared to be used in various environments and applications. It has...

Wire and cable are generally composed of four parts: wire core, insulation layer, shielding layer and protective layer (divided into inner sheath and outer sheath). Cables are more complex than wires. List of basic structure of wire and cable: (1) Wire core It is mainly used to conduct current...

The first type of conductor is solid conductor, that is, the conductor is composed of a single conductor, including circular wire and sector wire. For large cross-section circular conductor core, in order to reduce skin effect, sometimes four and five segments are used to divide the core, and...

Mica tape is a kind of refractory insulation material, according to mica can be divided into: synthetic mica tape, phlogopite tape, muscovite tape. Its best quality performance is synthetic mica, muscovite is the worst, for small specifications of the cable must be selected synthetic mica tape...