Optimal jamming of fh synchronous signals 跳頻同步信號(hào)的最佳干擾
Measuring source selected from ch1 or ch2 as synchronous signal sources 測(cè)量感度:大于2格量測(cè)源選擇來自ch1或ch2之同步信號(hào)
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(duì)送給mc1311cmos攝像機(jī)的同步信號(hào)進(jìn)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(jì)出完全同步的信號(hào),所以采用cpld和arm7系統(tǒng)共同完成測(cè)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(cè)的各發(fā)電機(jī)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(hào)處理器(dsp)為主控制器,結(jié)合同步模數(shù)轉(zhuǎn)換器(adc)實(shí)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(hào)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(bào)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(cè)速的同時(shí)產(chǎn)生了一個(gè)高精度的同步信號(hào)作為高速攝影的觸發(fā)信號(hào)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(jī)的時(shí)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(jì)算機(jī)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(xì)論述了計(jì)算機(jī)視頻信息電磁泄漏的原理及特點(diǎn),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(duì)同步信號(hào)的精度控制在皮秒級(jí);論述了清晰再現(xiàn)對(duì)接收機(jī)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)挠行裕阌谔崛酱a,降低了編譯碼過程的復(fù)雜性,同時(shí)也降低了系統(tǒng)的電路復(fù)雜程度。