概覽 通過與傳統(tǒng)的儀器進行比較,了解軟件定義的PXI RF儀器在速度上的優(yōu)勢。如WCDMA測量結(jié)果所示,基于多核處理器并行執(zhí)行的labview測量算法與傳統(tǒng)儀器相比可以實現(xiàn)明顯的速度提升。 介紹 你在早晨7:00伴著搖滾音樂的聲音醒來,收音機鬧鐘里的RDS接收器提示你正在收聽來自Guns N’ Roses 樂隊的Welcome to the Jungle。然后,在你品嘗咖啡期時,可以在書房通過WLAN接收器來查收郵件。當(dāng)準(zhǔn)備好工作后,你走出家門,使用一個315MHz的FSK發(fā)射機來打開車鎖。坐到車里,駛上道路,你又可以享受無線電收音機所提供的沒有廣告的娛樂節(jié)目。稍后,你會通過藍牙耳機會與車內(nèi)的3G手機建立連接。幾分鐘內(nèi),車載的GPS導(dǎo)航儀可以修正你當(dāng)前的3D位置,并向你指示路徑。GPS接收機傳出的聲音提示你需要駛?cè)胧召M公路,同時RFID接收器將自動收取相應(yīng)的過路費。 RF技術(shù)無處不在。即便作為一個普通的消費者,每時每刻都會受其影響,更不要說一個RF測試工程師了。無線設(shè)備的成本大幅降低,可以讓業(yè)余的時間變得更輕松,但是在設(shè)計下一代RF自動測試系統(tǒng)時,將會帶來更多的挑戰(zhàn)。工程項目所面臨的降低測試成本的挑戰(zhàn),比以往任何時候都嚴峻。因此,當(dāng)前的自動測試系統(tǒng)所關(guān)注的焦點在于減少整體的測試時間。
標(biāo)簽: WCDMA RF 基準(zhǔn) 比較
上傳時間: 2013-10-09
上傳用戶:wangrong
SDH傳輸系統(tǒng)光接口 SDH光接口的分類及應(yīng)用代碼 應(yīng)用代碼的表達方式:X-Y.Z,如:V-64.2、S-64.1
標(biāo)簽: 傳輸系統(tǒng) 數(shù)字接口 光接口
上傳時間: 2013-11-22
上傳用戶:非洲之星
通過比較各種隔離數(shù)字通信的特點和應(yīng)用范圍,指出塑料光纖在隔離數(shù)字通信中的優(yōu)勢。使用已經(jīng)標(biāo)準(zhǔn)化的TOSLINK接口,有利于節(jié)省硬件開發(fā)成本和簡化設(shè)計難度。給出了塑料光纖的硬件驅(qū)動電路,說明設(shè)計過程中的注意事項,對光收發(fā)模塊的電壓特性和頻率特性進行全面試驗,并給出SPI口使用塑料光纖隔離通信的典型應(yīng)用電路圖。試驗結(jié)果表明,該設(shè)計可為電力現(xiàn)場、電力電子及儀器儀表的設(shè)計提供參考。 Abstract: y comparing characteristics and applications area of various isolated digital communications, this article indicates advantages of plastic optical fiber in isolated digital communications. Using the standardized TOSLINK interface, it helps to control costs and difficulty in hardware development and design. Then it gives the hardware driver circuit of plastic optical fiber module, explains the noticed details in design process, gives results on the basis of the optical transceiver module voltage characteristics and frequency characteristics tests. Finally,it gives typical application circuit of the SPI communication port by using plastic optical fiber isolation .The results show that this design can be referenced for the power field, power electronics and instrumentation design.
標(biāo)簽: 塑料光纖 高壓隔離 通信 接口設(shè)計
上傳時間: 2014-01-10
上傳用戶:gundan
物聯(lián)網(wǎng)周刊(智慧化零售和遠程支付
標(biāo)簽: 2010 物聯(lián)網(wǎng) 零 遠程
上傳時間: 2013-10-12
上傳用戶:ryb
1999年-51期-用89C51控制的數(shù)字測溫儀
標(biāo)簽: 89C51 控制 數(shù)字測溫儀
上傳時間: 2013-10-27
上傳用戶:哈哈haha
1999年-44期-微電腦倒計時器
上傳時間: 2013-10-09
上傳用戶:watch100
中文版詳情瀏覽:http://www.elecfans.com/emb/fpga/20130715324029.html Xilinx UltraScale:The Next-Generation Architecture for Your Next-Generation Architecture The Xilinx® UltraScale™ architecture delivers unprecedented levels of integration and capability with ASIC-class system- level performance for the most demanding applications. The UltraScale architecture is the industr y's f irst application of leading-edge ASIC architectural enhancements in an All Programmable architecture that scales from 20 nm planar through 16 nm FinFET technologies and beyond, in addition to scaling from monolithic through 3D ICs. Through analytical co-optimization with the X ilinx V ivado® Design Suite, the UltraScale architecture provides massive routing capacity while intelligently resolving typical bottlenecks in ways never before possible. This design synergy achieves greater than 90% utilization with no performance degradation. Some of the UltraScale architecture breakthroughs include: • Strategic placement (virtually anywhere on the die) of ASIC-like system clocks, reducing clock skew by up to 50% • Latency-producing pipelining is virtually unnecessary in systems with massively parallel bus architecture, increasing system speed and capability • Potential timing-closure problems and interconnect bottlenecks are eliminated, even in systems requiring 90% or more resource utilization • 3D IC integration makes it possible to build larger devices one process generation ahead of the current industr y standard • Greatly increased system performance, including multi-gigabit serial transceivers, I/O, and memor y bandwidth is available within even smaller system power budgets • Greatly enhanced DSP and packet handling The Xilinx UltraScale architecture opens up whole new dimensions for designers of ultra-high-capacity solutions.
標(biāo)簽: UltraScale Xilinx 架構(gòu)
上傳時間: 2013-11-21
上傳用戶:wxqman
allegro教程
標(biāo)簽: Cadence_Allegro 基礎(chǔ)培訓(xùn)
上傳時間: 2013-11-23
上傳用戶:dapangxie
有時候,做元件封裝的時候,做得不是按中心設(shè)置為原點(不提倡這種做法),所以制成之后導(dǎo)出來的坐標(biāo)圖和直接提供給貼片廠的要求相差比較大。比如,以元件的某一個pin 腳作為元件的原點,明顯就有問題,直接修改封裝的話,PCB又的重新調(diào)整。所以想到一個方法:把每個元件所有的管腳的X坐標(biāo)和Y坐標(biāo)分別求平均值,就為元件的中心。
標(biāo)簽: Layout Basic PADS Scr
上傳時間: 2014-01-09
上傳用戶:xzt
電路板故障分析 維修方式介紹 ASA維修技術(shù) ICT維修技術(shù) 沒有線路圖,無從修起 電路板太複雜,維修困難 維修經(jīng)驗及技術(shù)不足 無法維修的死板,廢棄可惜 送電中作動態(tài)維修,危險性極高 備份板太多,積壓資金 送國外維修費用高,維修時間長 對老化零件無從查起無法預(yù)先更換 維修速度及效率無法提升,造成公司負擔(dān),客戶埋怨 投資大量維修設(shè)備,操作複雜,績效不彰
上傳時間: 2013-11-09
上傳用戶:chengxin
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