antique copper still

From: 21ic When it comes to PCB, many friends will think of it everywhere around us. From all household appliances, various computer accessories, to various digital products, PCB is almost used as long as it is an electronic product, so what is PCB? PCB is the printedcircuitblock, that is, the printed circuit board, for the electronic components to be installed, there is a line of the base version. The Base Plate of copper plating is printed with the

capability. The technical strategy of the new telecom operators is to follow the imitation type + application improved type--because of the less physical network resources and the lack of user resources in the market, the new telecom operators can only catch up and actively build the basic network resources and realize the fiber to the households. At the same time, the mobile service and the fixed business are bundled, the new telecom operators to achieve the goal of the city network market by

copper cable to the external anomaly is more sensitive. As the rate of transmission increases, installation of the correct or not to the system performance of the greater impact, unreasonable pipeline design, nonstandard installation steps, not in place of the management system, will be 6 types of wiring test results (including physical and electrical performance) impact, and some are difficult to repair the problem. So to ensure the installation of

In multimedia, a variety of audio and video technology is widely used today, users of the network requirements are more and more high, the amount of data transmission has become more and more big. In this environment, as the bearer of data transmission-transmission media become more important, when the network construction enterprises, network cabling needs to build a strong performance and safe and effective foundation. Therefore, in the network cabling, understand a variety of network transmis

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Lithium-ion batteries are generally divided into the main four major parts are cathode materials, anode materials, isolation membranes and electrolytes. However, in addition to the main four parts, the storage of positive and negative materials is an important component of lithium batteries. basic information of the set fluid For lithium-ion batteries, the usual use of the positive collector is aluminum foil, negative collector fluid is copper foil, i

good confidentiality. The shielding structure of Shielded Cables has inherent advantages in reducing mutual interference between cables, it not only shields external electromagnetic signals, but also blocks the electromagnetic leakage of cables. It does not emit interference signals, affecting other cables and preventing information from being eavesdropped. In the shielded network cable, there will be a copper wire, that is, the ground line, you can

lowest priority, that is, the first time to meet the network and network5. Setting of Copper connection shape (manufacturing label polygon Connect Style)It is recommended to use relief Connect mode traverse width conductor width take 0.3-0.5mm 4 wire 45 or 90 degrees.The rest of the items are generally available with its original default values, which can be set as needed, such as the topology of the cabling, the spacing of the power layer, and the n

Compared with traditional analog transmission products and copper-based systems, the third generation digital optical fiber product provides a unique advantage: Performance consistency. No matter how long the optical fiber is used, the baseband video and audio performance will always remain high in the system and provide consistent performance. Point-to-Point Distribution of AV signals can easily implement digital optical fiber technology. Topology ca

is a man who will be chopped! "When there is Prince PLoS, Word yan material, also on the table cut advice, Rui life chopped." The same day call Majun asked Yue: "I built a lofty pavilion, want to contact with the immortal, in order to immortality of the side." "June played Yue:" Han Dynasty 24 Emperor, but emperor to enjoy the longest, Shou calculation is very high, covered by the Sky Day fine Yuet-wah gas also: taste in Chang ' an palace, build cypress Beam Taiwan, the platform of a

--------------------------------------------------------------------------------------------------------------- ---------------------Sheet TechnologyThe following parameters or tables represent only part of the plate process and simulation selection parameters, the actual production will have a certain difference (but not a small deviation!). ）The simulation software uses Polar's "Si9000".1oz=28.35g,1oz copper thickness refers to 1 square fe

capacitance effect, this for high-frequency circuit, will introduce too much interference, so in the wiring, should be as far as possible to reduce the number of holes. Again, too much vias can also cause the mechanical strength of the board to be reduced. Additional: One, the route: Input and output lines should try to avoid parallel, so as not to cause interference. The two signal lines parallel traces should be added ground isolation, two adjacent layer wiring to try to perpendicular to eac

　Chapter 1 golden age I Our story starts in Germany in 1887. Located by the Rhine River, karsrueu is a beautiful city with a famous 18th century palace in its center. The lush forests and warm climate make this small town a tourist attraction in Europe. However, the pleasant scenery does not seem to distract heinrichrudolf Hertz: He is now playing with his instrument intently in a laboratory at the University of karsrueu. At that time, Hertz was just 30 years old and may not have imagined that

Distributed design in data centers In a typical distributed switching architecture design, each server cabinet is connected through copper cables or optical fiber cables. For copper cabling, most cabinets in the data center are connected through 6A/EA class 10G Base-T copper cabling. The quantity of 6A/EA copper cables

Layer V. S. Plane Reprinted from: http://blog.21ic.com/user1/6960/archives/2011/83332.html The layer settings of the Multi-board had plagued me for several days, but I didn't understand the difference between the plane and layer. I think that the ground plane and power plane in the middle of the Multi-board should also be copper coated like the double panel, but there is no large copper coated in the Mult

The new PCB file defaults to the 2-layer board, which teaches you how to set 4 layers or even more multilayer boards. On the toolbar, click design-->layer Stack Manager. After entering the display is a two-layer board, added as a 4-layer board, usually first point top layer, then add layer, and then add layer, so it becomes a 4-layer board . See figure below. Some people do not point to add layer, but point to add plane, the difference is that the add layer is generally an increased signal la

and small four-core insulated wire cores into three insulated wire cores with smaller cross-section, and symmetric the three core Cables into cables, for 6/10 kV Inverter Motor cables, the cable structure is different from that of 6/10 kV common power cables. The common power cables shield three insulated wire cores with copper tape and form cables, the dedicated cables for variable-frequency motors are shielded by

transmit data, and high-speed packet switching devices such as ATM and IP-based switching) provide network routing. We mainly introduce the broadband access network, so the broadband technology of the backbone network is not much involved. Broadband access network technology provides the last kilometer of connection, that is, the connection between the user and the backbone network. With the large-scale investment in network infrastructure by major telecom operators, it can be said that the bac

, but the optical fiber system is extremely expensive, and the price is often determined by the customer. The cost of the optical fiber cabling system today is twice that of the six types of wiring. At the same time, it is easier to install copper cables than to install optical cables. In addition, copper products also support IEEE (802.3af) DTE standards being developed. 6. What is electrical balance? A: T

point. In addition, we hope that experts will give you some good suggestions and suggestions!A: In addition to separate the ground, you should also pay attention to the power supply of the analog circuit. If the power supply is shared with the digital circuit, it is best to add a filter line. In addition, do not interlace digital and analog signals, especially do not cross the moat ). 5. Copper Grounding in blank areas of signal layer in High-Speed P