Optimal jamming of fh synchronous signals 跳頻同步信號的最佳干擾
Measuring source selected from ch1 or ch2 as synchronous signal sources 測量感度:大于2格量測源選擇來自ch1或ch2之同步信號
The synchronous signal of mc1311 cmos camera is shaped by monostable trigger 74ls221 使用單穩(wěn)態(tài)觸發(fā)器74ls221對送給mc1311cmos攝像機的同步信號進行整形。
Single arm7 couldn ’ t supply synchronous signals , so test system was developed with cpld and arm7 使用單一的arm7系統(tǒng)不能設(shè)計出完全同步的信號,所以采用cpld和arm7系統(tǒng)共同完成測試工作。
And the 1pps of the gps receiver is used as the synchronous signal and reference to ensure that the messured phasor of generator is the same reference 采用gps的秒脈沖作為同步參考基準(zhǔn),從而保證了所測的各發(fā)電機的相角具有相同的參考基準(zhǔn)。
Digital signal processor ( dsp ) was used as the microcontroller of the daq card , and synchronous a / d converters were used to collect synchronous signals 該數(shù)據(jù)采集卡以數(shù)字信號處理器( dsp )為主控制器,結(jié)合同步模數(shù)轉(zhuǎn)換器( adc )實現(xiàn)了多通道同步采集的功能。
The fault diagnosis system includes four parts : sampling and insulation of the synchronous signal , sampling of the voltage waveform of the rectifier , logic pre - processing and dft analysis , display and alarm circuit 故障診斷系統(tǒng)主要包括同步信號的取樣與隔離、整流電壓的采樣、邏輯預(yù)處理及dft分析,診斷顯示報警電路等四部分。
Meanwhile , a synchronous signal is generated to be the start signal of the high speed snapshot . in this case , the effective length of the film is increased enormously , which means that the resolution of the camera may be improved at the same rotating speed 而且在測速的同時產(chǎn)生了一個高精度的同步信號作為高速攝影的觸發(fā)信號源,使得用于記錄信息的膠片的有效使用長度得到了很大的提高,這就意味著轉(zhuǎn)鏡相機的時間分辨率在相同的轉(zhuǎn)速下得到了提高。
The second , the main work in the paper is discussed . they are include : the theory and character of electromagnetic leaking from a computer ; the theory of accumulation mean filter and pectination filter ; the analysis of synchronous signal precision , at 10 - 12 second level , for stably intercepting ; the technology requirement of receiver and data acquisition board for clearly displaying the images recovered from the intercepted data 本文從計算機視頻電磁泄漏和數(shù)字濾波器兩方面的基本理論出發(fā),詳細論述了計算機視頻信息電磁泄漏的原理及特點,指出視頻泄漏信息的頻譜是以行頻為周期的譜線;分析了重加濾波器和梳狀濾波器的性能;分析了視頻泄漏信息截獲的條件;推導(dǎo)出穩(wěn)定截獲視頻泄漏信息需要對同步信號的精度控制在皮秒級;論述了清晰再現(xiàn)對接收機和數(shù)據(jù)采集卡的技術(shù)要求。
The input data of the multiplexing adopts 8 channels with the speed of 2mb / s , and those of the last two channels are " 0 " and " 1 " respectively , in order to improve the transimision effeciency and deminish the complexity of encode and electronic circuit concerned , furthermore , it makes the synchronous signal acquisition more easier 數(shù)字復(fù)接中采用八路2m口數(shù)據(jù)輸入,其中后兩路采用直接輸入“ 0 ”碼或“ 1 ”碼的方法,提高了信息傳輸?shù)挠行?,便于提取幀同步碼,降低了編譯碼過程的復(fù)雜性,同時也降低了系統(tǒng)的電路復(fù)雜程度。