no longer possible to inherit from another base class. Therefore, it is a good idea to provide an abstract interface (interface), a class can implement multiple interfaces, thus simulating the implementation of "multi-Inheritance", for the design of the class provides greater flexibility. Minimizing the direct access to variables the encapsulation principle of data should be normalized, not exposing the properties of one class to other classes, but should protect them by means of access, which
transceiver circuit energy consumption management
Although the power management of embedded processors has been thoroughly studied, the energy-saving design of Wireless Transceiver systems is not enough. Wireless Communication accounts for the majority of the energy consumption of the entire wireless sensor network, so it is very important to manage the energy consumption of the Wireless
The Data encapsulation principle should be standardized. Instead of exposing the attributes of a class to other classes, we should protect them through access methods, which is conducive to avoiding the ripple effect. If the name of an attribute changes, you only need to modify its access method, rather than modifying all relevant code.
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Subclass features to complete speci
interface
Common Ethernet interfaces include AuI, BNC and RJ-45 interfaces, as well as FDDI, ATM, Gigabit Ethernet and so on all have corresponding network interfaces, the following describes the main LAN interfaces.
(1). AuI PortThe AuI port is the interface used to connect to the coarse coaxial cable. It is a "d" Type 15-pin interface, this is one of the most common ports in the ring or bus network. The router can connect to the 10base-5 network through a coarse coaxial cable
receives the digital signal to receive the D/a transformation, becomes the analog signal.
Bluetooth module BRF6100
Bluetooth signal transceiver is realized by Bluetooth module BRF6100. BRF6100 is the TI company recently introduced to follow the Bluetooth V1.1 standard wireless signal transceiver chip, its upgrade model BRF6150 support V1.2 Standard, BRF6100 main features are: Digital wireless processor i
There are many different classifications of fiber optic transceivers, and most of the attention is being paid to categories that are differentiated by fiber connectors: SC connectors, fiber transceivers, and fc/st connectors.
When using a fiber-optic transceiver to connect to different devices, you must be careful to use different ports.
1, optical transceiver to the 100BASE-TX device (switch, hub) conn
In the composition of wireless networks, the use of many devices deserves a detailed understanding. Today we will talk about the failure of VLAN wireless Internet access switches. The following is an experience shared by a netizen: A strange problem occurs in the VLAN of the two departments where an office area is located. Some websites on the Internet can be accessed normally, but some websites cannot; emails received through Outlook or Foxmail are normal, and small emails without attachments a
Abstract:Cp2101 and its upgraded product cp2102 are highly integrated USB-UART bridging circuits manufactured by the United States's silicon company. They can use the simplest external circuit, the least external device and the smallest area of the circuit board for easy conversion from USB2.0 to UART. This paper introduces the main features and practical application methods of the circuit.
Keywords:Cp2101 UART USB
IntroductionCp2101 and its upgraded product cp2102 is the USB-UART Bridge Circui
NXP Semiconductors, formerly known as Philips semiconductor, has announced that the company uses a full range of transceiver products using WiMAX 2x2 MIMO (Multiple Input Multiple Output, Multiple inputs and Multiple outputs) technology, this series of products is specifically designed for mobile and handheld applications. To fully support the adoption of mobile WiMAX technology, the new series of NXP Semiconductors adopt 2x2 MIMO technology, doubling
1. What is gttransceiver?
The gttransceiver is a type of FPGA line speed up to 500 Mb/s. the 6 Gbit/s Transceiver can be flexibly configured using FPGA's internal programmable resources, making it suitable for different needs such as Ethernet and sata1.0 interfaces, it serves the physical layer of various high-speed serial interfaces. For the spartan6 series, the gtpa1_dual contains two GTS transceiver, or
languageDevelopment of FPGA tools for signal processing and scientific computing product development)Http://download.altera.com/akdlm/software/acdsinst/14.1/186/ib_installers/AOCLSetup-14.1.0.186-windows.exe 189MBHttp://download.altera.com/akdlm/software/acdsinst/14.1/186/ib_installers/aocl-rte-14.1.0.186-windows.exe 9MBDSP Builder (can not install, MATLAB plug-in, for signal processing product development)Http://download.altera.com/akdlm/software/acdsinst/14.1/186/ib_installers/DSPBuilderSetup
The test of the optical cable cabling system is a necessary step for project acceptance. It is also the final process for the project contractor to honor the contract with the real estate owner. Only after the system test is passed can the cabling system be completed.
The connectivity of devices is the most basic requirement for wiring system testing. The effectiveness of jumper systems can be easily tested. It is relatively difficult to test the indicator data of communication lines, generally,
, but the price and interface card bottlenecks caused by the problem also exposed. This paper is based on SCM, can device and network chip as the core module to complete the function of the description. This approach lowers costs and avoids bottlenecks.
3. Hardware part
There are a variety of hardware implementation, can use integrated TCP/IP protocol MCU plus can transceiver and controller, can also use integrated can controller MCU plus can
A strange problem occurs in the VLAN of the two Departments in the office area of the organization. Some websites on the Internet can access normally, but some websites cannot access it. emails received through Outlook or Foxmail are normal, it is also normal to send small emails without attachments, but it cannot be normally sent when sending large emails or emails containing attachments. Internet access is normal in other office areas of the Organization. The topology 1 of this part of the net
, resulting in an increase in the error rate of signal transmission, this affects the overall network performance. Only by building standards can we ensure the normal operation of the network and facilitate the maintenance work in the future.
Connection Methods between devices 1. network card and network cardWhen the 10 M and M NICs are directly connected, the cross-line connection method should be adopted.
2. Nic and optical transceiver moduleInstall
lines within the line cannot be effectively eliminated, resulting in an increase in the error rate of signal transmission, this affects the overall network performance. Only by building standards can we ensure the normal operation of the network and facilitate the maintenance work in the future.
Connection Methods between devices
1. network card and network card
When the 10 M and M NICs are directly connected, no Hub is needed. Cross-line connection should be adopted.
2. Nic and optical
cannot be effectively eliminated, resulting in an increase in the error rate of signal transmission, this affects the overall network performance. Only by building standards can we ensure the normal operation of the network and facilitate the maintenance work in the future.
Connection Methods between devices
1. network card and network card
When the 10 M and M NICs are directly connected, no Hub is needed. Cross-line connection should be adopted.
2. Nic and optical
the line can be connected, but the interference between various lines within the line cannot be effectively eliminated, resulting in an increase in the error rate of signal transmission, this affects the overall network performance. Only by building standards can we ensure the normal operation of the network and facilitate the maintenance work in the future. Connection method between devices 1. When the network card is directly connected to the 10 m or M network card of the network card, the hu
1. Los: Alarm for signal lossIt indicates that the local end cannot receive light or electrical signals. When the signal amplitude remains below a preset threshold value (the threshold value is very small, far lower than or equal to 10-3) within a given time (for example, 100 ms, the SDH device enters the Los state. If two consecutive valid frame locating patterns are detected and no los is detected, the SDH device should exit the Los state.(1) optical port los:Network Management alarm: Light re
ArticleDirectory
Glossary: bare pad (exposed pad)
Http://china.maxim-ic.com/glossary/definitions.mvp/terms/all :bare pad (exposed pad)
Definition
Some packages have bare pad to improve the heat dissipation of the device. It is usually not electrically insulated and can be grounded or powered according to electrical connection requirements.
Synonym
EP
Bare chassis
Keywords
Pad, encapsulation, heat dissipation
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