Includes setup, expansion, and troubleshooting information for your Mac Pro computer
标签： Mac Pro
上传时间： 2015-03-24
上传用户：wdl1127
From the transition of analog to digital communication along with seamless mobility and high computing power of small handheld devices, the wireless communications industry has seen tremendous changes leading to the integration of several telecommunication networks, devices and services over last 30 years. The rate of this progress and growth has increased particularly in the past decade because people no longer use their devices and networks for voice only, but demand bundle contents such as data download/streaming, HDTV, HD video , 3D video conferencing with higher efficiency, seamless connectivity, intelligence, reliability and better user experience. Although the challenges facing service providers and telecommunication companies differ by product, region, market size, and their areas of concentration but time to market, efficient utilization of their assets and revenue expansion, have impacted significantly how to manage and conduct their business while maintaining sufficient margin.
标签： Convergence Networks Beyond 4G of
上传时间： 2020-05-26
上传用户：shancjb
The current methods of communications are becoming less relevant under today’s growing demand for and reliance on constant connectivity. Of decreasing relevance are the models of a single radio to perform a single task. The expansion of wireless access points among coffee shops, airports, malls, and other public arenas is opening up opportunities for new services and applications.
上传时间： 2020-05-26
上传用户：shancjb
The wireless market has experienced a phenomenal growth since the first second- generation (2G) digital cellular networks, based on global system for mobile communications (GSM) technology, were introduced in the early 1990s. Since then, GSM has become the dominant global 2G radio access standard. Almost 80% of today’s new subscriptions take place in one of the more than 460 cellular networks that use GSM technology. This growth has taken place simultaneously with the large experienced expansion of access to the Internet and its related multimedia services.
标签： Performance Evolution GPRS EDGE GSM and
上传时间： 2020-05-27
上传用户：shancjb
With the rapid expansion of wireless consumer products,there has been a con- siderable increase in the need for radio-frequency (RF) planning, link plan- ning, and propagation modeling.A network designer with no RF background may find himself/herself designing a wireless network. A wide array of RF planning software packages can provide some support, but there is no substi- tute for a fundamental understanding of the propagation process and the lim- itations of the models employed. Blind use of computer-aided design (CAD) programs with no understanding of the physical fundamentals underlying the process can be a recipe for disaster. Having witnessed the results of this approach, I hope to spare others this frustration.
标签： Introduction Propagation to RF
上传时间： 2020-05-27
上传用户：shancjb
Recent decades have shown a tremendous expansion of the Internet. The number of connected terminals has increased by orders of magnitude, traffic has grown exponen- tially, coverage has become ubiquitous and worldwide, and today’s sophisticated Web 2.0 applications are increasingly providing services which hitherto have been the realm of telecommunications, such as Skype and video conferencing. This has even led to the thought that access to the Internet might one day be a universal right of every citizen. This evolution will accelerate in the coming decades.
标签： Networking Personal Networks Wireless
上传时间： 2020-05-31
上传用户：shancjb
During the past three decades, the world has seen signifi cant changes in the telecom- munications industry. There has been rapid growth in wireless communications, as seen by large expansion in mobile systems. Wireless communications have moved from fi rst-generation (1G) systems primarily focused on voice communications to third-generation (3G) systems dealing with Internet connectivity and multi-media applications. The fourth-generation (4G) systems will be designed to connect wire- less personal area networks (WPANs), wireless local area networks (WLANs) and wireless wide-area networks (WWANs).
标签： Communications Networking Wireless
上传时间： 2020-06-01
上传用户：shancjb
The first edition as well as its forerunner of Kuffel and Abdullah published in 1970 and their translations into Japanese and Chinese languages have enjoyed wide international acceptance as basic textbooks in teaching senior under- graduate and postgraduate courses in High-Voltage Engineering. Both texts have also been extensively used by practising engineers engaged in the design and operation of high-voltage equipment. Over the years the authors have received numerous comments from the text’s users with helpful suggestions for improvements. These have been incorporated in the present edition. Major revisions and expansion of several chapters have been made to update the continued progress and developments in high-voltage engineering over the past two decades.
标签： Engineering Voltage High
上传时间： 2020-06-07
上传用户：shancjb
There is an unprecedented enthusiasm for radio frequency identification (RFID) technologies today. RFID is based on the exchange of information carried by electromagnetic waves between a label, or tag, and a reader. This technology is currently in full economic expansion, which has manifested itself in widely backed research activities, some of which will be examined in this book.
标签： Identification Frequency Sensors Radio and
上传时间： 2020-06-08
上传用户：shancjb
CH341系列编程器芯片usb转串口Altium Designer AD原理图库元件库CSV text has been written to file : 1.9 - CH341系列编程器芯片.csvLibrary Component Count : 56Name Description----------------------------------------------------------------------------------------------------CH311Q PC debug port monitorCH331T Mini USB Disk ControllerCH340G CH340H USB to TTL Serial / UART, USB to IrDACH340T USB to TTL Serial / UART, USB to IrDACH340R USB to IrDA, USB to RS232 SerialCH340S_P USB to Print Port / ParallelCH340S_S USB to TTL Serial / UART, pin compatible with CH341CH341A_S USB to TTL Serial / UART / I2C/IICCH341S_P USB to Print Port / ParallelCH341A_P USB to Print Port / ParallelCH341S_S USB to TTL Serial / UARTCH341S_X USB to EPP Parallel / SPI / I2C/IICCH341A_X USB to EPP Parallel / SPI / I2C/IICCH341T USB to TTL Serial / UART / I2C/IICCH345T USB to MidiCH352L_M PCI to 8255 mode 2 Parallel for MCU and 16C550 UART / IrDACH352L_P PCI to Print Port / Parallel and 16C550 UART / IrDACH352L_S PCI to Dual 16C550 UART, TTL Serial*2 / IrDA*1CH362L PCI Device / Slave only for RAM / expansion ROMCH364F Member of CH364 chipsetsCH364P PCI Device / Slave Embedded Flash ROM, for expansion ROMCH365P PCI Device / Slave, for I/O port or RAM / ROMCH372T USB Device / Slave for MCU, ParallelCH372A USB Device / Slave for MCU, ParallelCH372V USB Device / Slave for MCU, ParallelCH374S USB Host & Device / Slave for MCU, parallel / SPICH374T USB Host & Device / Slave for MCU, parallel / SPICH375S USB Host & Device / Slave for MCU, parallel / UART SerialCH375A USB Host & Device / Slave for MCU, parallel / UART SerialCH375V USB Host & Device / Slave for MCU, parallel / UART SerialCH411G FDC MFM encode and decodeCH421A Dual port bufferCH421S Dual port bufferCH423D I2C/IIC I/O expander, 16 GPO + 8 GPIO, 128 LEDs DriveCH423S I2C/IIC I/O expander, 16 GPO + 8 GPIO, 128 LEDs DriveCH423D_D I2C/IIC I/O expander, 16 GPO + 8 GPIO, 128 LEDs DriveCH423S_D I2C/IIC I/O expander, 16 GPO + 8 GPIO, 128 LEDs DriveCH423G I2C/IIC I/O expander, 6 GPO + 5 GPIOCH432Q Dual 16C550 UART with IrDA, parallel / SPICH432T SPI Dual 16C550 UART with IrDACH450K 6 Digits / 48 LEDs Drive & 8x6 Keyboard, I2C/IICCH450H 6 Digits / 48 LEDs Drive & 8x6 Keyboard, I2C/IICCH450L 8 Digits / 64 LEDs Drive & 8x8 Keyboard, I2C/IICCH451L 8 Digits / 64 LEDs Drive & 8x8 Keyboard, 4 Wire Interface, SPICH451S 8 Digits / 64 LEDs Drive & 8x8 Keyboard, 4 Wire Interface, SPICH451D 8 Digits / 64 LEDs Drive & 8x8 Keyboard, 4 Wire Interface, SPICH452L_2 8 Digits / 64 LEDs Drive & 8x8 Keyboard, I2C/IICCH452L_4 8 Digits / 64 LEDs Drive & 8x8 Keyboard, 4 Wire Interface, SPICH452S_2 8 Digits / 64 LEDs Drive & 8x8 Keyboard, I2C/IICCH452S_4 8 Digits / 64 LEDs Drive & 8x8 Keyboard, 4 Wire Interface, SPICH453S 16 Digits / 128 LEDs Drive, I2C/IICCH453D 16 Digits / 128 LEDs Drive, I2C/IICPCI 32Bit PCI Bus, simple / short cardPCI32 32Bit PCI BusUSB USB Port
标签： ch341 编程芯片 usb 串口 altium designer
上传时间： 2022-03-13
上传用户：
