frequency modulator 中文意思是什麼
frequency modulator
解釋
調頻器-
The catv charge and control system is mainly composed of the management software 、 the header data modulator and the terminal charge and control equipment. i am responsible for design catv charge and control equipment and test system. the header data modulator is used to encrypt the control single from computer and transmit it into the appointed frequency. the terminal charge and control equipment demodulate out the control single from data modulator and transmit it to the addressing control part, where the demodulated fsk single is received and well - handled by the cpu unit, decode the unauthorized signals and deliver it to the shut point, shut point make use of capability of wideband anf characteristic of shut, then the signal of illegal customer will be turn off and vice versa, the legal customer can receive the normal signal
前端數據調制器完成對計算機輸出的控制信號加密處理，將指令碼載送到一指定頻率點。終端收費控制器解調出控制信號，送至單片機尋址控制部分。單片機尋址控制部分接收經fsk數據解調器送來的信號，送入cpu單元后，解出不授權信號，然後向關斷部分送入信號，關斷部分利用pin二極體的寬帶工作能力以及關斷特性，實現對非授權用戶或者非法用戶的信號關斷，使之不能正常收視，繳費用戶進行開通正常收視，達到控制用戶通道的管理。 -
The detecting accuracy of the beam drift would be improved, as a high performance acoustooptic modulator modulates the frequency of the laser beam drift signal far away from the power frequency, the double power frequency and high frequency noises
具體包括: 1 .利用聲光調制器將光束漂移量信號調制到遠離工頻及其倍頻干擾和高頻噪聲的頻帶段，以期提高光束漂移量的檢測精度。 -
Fixed channel modulator frequency range
固定頻道調變主機 -
A cyclic radial shearing interferometer was used to diagnose the wavefront distortion of a laser system and an lcslm ( liquid crysnd spatial ligh modulator ) was used to control it. some results have been summarized as follows : l. according to the theory of scalar quanity diffeaction and the model of the random gaussian phase screen of low frequency wavefront, the effect of the low frequency wavefront with different rms gradient on the focal spot of a laser beam was studied
本論文在激光光束波前畸變檢測和控制上進行了新的探索，主要就空間相位調制環路徑向剪切干涉儀以及它對波前畸變的檢測和液晶空間光調制器及其對中頻段波前畸變的控制進行了研究，其研究的內容和取得的成果如下：一、根據標量衍射理論，結合低頻波前畸變的高斯隨機位相分佈模型，研究了不同均方根梯度低頻畸變波前對激光光束焦斑聚焦性的影響，並採用描述中頻段波前畸變的功率譜密度概念，模擬計算了它對激光焦斑旁瓣的貢獻。 -
Sawtooth frequency modulator
鋸齒波調頻器 -
Using fiber grating to substitute traditional wavelength - selecting components, the 8nm tuning range is realized at a repetition frequency of 2. 5ghz. ( 5 ). the wavelength - tuning methods of an active mode - locked fiber laser using a ld as a modulator are researched, and two tuning methods including temperature tuning
（ 4 ）對主動鎖模光纖激光器的波長調節技術進行了研究，用光纖光柵代替傳統的波長選擇器件實現了主動鎖模光纖激光器的波長調諧，並獲得了波長連續調諧范圍達8nm 、重復頻率2 . 5ghz的穩定的光脈沖輸出。 -
The system has ability to limit high current and protect the switch from overload and short circuit. the basic principle is analysed in this paper, and the frequency of modulator is obtained
該系統具有內在限流保護能力，從而使開關器件在系統過載或短路時得到保護，提高了運行可靠性。 -
In magneto - optic ( mo ) waveguids, the interaction between msws and guided optical waves ( gows ) can lead to the bragg diffraction of the gows. the resulting many new devices, such as mo modulator, optical switching, scanning, frequency spectrum analyzers, can be developed with applications to optical communication and optical information processing
在磁光波導中，靜磁波與導波光相互作用可導致導波光的bragg衍射，利用這一原理，可做成磁光調制器、光開關、掃描儀、頻譜分析儀等新型磁光bragg器件，並在光通信和光信息處理等領域有著十分廣闊的應用前景，引起人們越來越多的關注。 -
The main works and results we have accomplished are as follows : 1 ) red - detuned locking of cooling / trapping laser to the cycling transition of cesium cooling has been accomplished by means of a double - passed acoustic - optical frequency shifting system and the technique of saturated absorption spectroscopy. the short - term residual frequency jitter is less than 350khz ; 2 ) automatic controlling system by computer programs has been established for laser cooling and trapping and cavity qed experiment. the laser and magnetic fields can be controlled by the acoustic - optical modulator and the electronic - controlled logic gate respectively
具體如下： 1 ）採用了往返兩次通過的聲光頻移系統結合飽和吸收光譜技術的實驗方案，實現了冷卻俘獲激光頻率相對于銫原子冷卻循環躍遷的負失諧鎖定，短期頻率穩定度約在350khz以內，並可方便地調節其負失諧量而無須對后續光路再作調整； 2 ）建立了一套基於計算機程序控制的、銫原子激光冷卻與俘獲實驗所需的時序控制系統。 -
Because of the importance of the phase modulator in the detection procedure in resonator fiber gyro, this thesis analyses the band side frequency caused by the phase modulation, proposing the methods how to eliminate the band side frequency effect and how to make use of the band side frequency
由於線性相位調制器在諧振式光纖陀螺的檢測過程中起到重要的作用，本文分析了由於相位調制器調制問題引入的邊帶頻率效應，提出了消除邊帶頻率和如何利用邊帶頻率的方法。 -
The experiment results show that : the frequency stabilization of the optimized doppler modulator has already reached rms error about 1 %, which could meet the need of reference signal of the lock - in amplifier
實驗結果表明，經過優化后的多普勒調制器的輸出調制信號頻率的相對標準誤差達到了1 %左右，能夠滿足鎖相放大器對輸入參考信號頻率穩定度的要求。 -
I use special instrument to test items of modulator ( ( frequency 、 constellation ), all up to the anticipated performance, so the system could be made into asic which could be served to the digital society
整個設計利用專用測試儀對頻譜、星座圖和其它各項發射指標進行測試，均達到預想效果，所以該fpga系統可以作為進一步進行流片，成為專用晶元，更好的服務于數字社會。 -
Meanwhile i give analysis method of constellation map. to update system, system optimization direction is taken as the most important thing, such as choice of modulator parameter, reduce power dissipation, improve circuit work frequency,
同時給出星座圖分析說明;最為重要的是提出系統優化的方向，如調制參數的選擇、如何降低功耗、如何提高電路工作頻率，為系統的升級做了規劃。 -
Abstract : this paper introduces the application of change - frequency velocity modulator in the mine fan, analyzes and compares energy charge before transformation with after. change - frequency velocity modulator has notable saving electric energy effect
文摘:介紹了變頻調速器在通風機改造中的應用，對改造前後的能耗進行分析比較，具有顯著的節電效果。 -
Phase modulation system is a superior system, can transmit data at high rate. in this thesis, digital fh - mpsk and fh - / 4dqpsk modulator and demodulator are given according to the frequency - hop communication characteristics. at last, we implement these systems in both hardware and software platform
本文根據跳頻傳輸的特點，對mpsk和4 - dqpsk這兩種相位調制方式進行分析，提出數字調制解調方案，並用matlab對其進行了模擬，最後還在ti公司的tms320c6416晶元上實現了這兩種系統。 -
The utilization of high speed dsp can highly increase the performance of anti - interference and anti - detection. the modulation mode, data rate and coding mode can be controlled by configuring the registers of modulator stel - 1109. the viewport and nco frequency control word selection can be accomplished by configuring the demodulator stel - 2105
Dsp通過i / o讀寫操作，控制調制晶元stel - 1109的讀寫寄存器，用來設置晶元的調制方式、數據速率、編碼方式等；而dsp對解調晶元stel - 2105讀寫寄存器的控制，則對解調的一系列視窗選擇及nco頻率控制字進行了設置。 -
It analyze the performance index of the mid - frequency modulator firstly, abased this, analyze the design of it, which include the agc circuit 、 dds circuit 、 and so on. fourthly, discuss how to realize the digital mid - frequency modulator
在分析了中頻調制器所要求的性能指標的基礎上，對數字中頻調制器進行了工程設計分析，包括agc電路設計、 dds方案選擇等。 -
This dissertation use rebuild of combined telemeter system, which is the subsystem of the red - nine system developed by the aerospace measure and telecommunication incorporated company, as background, study and discuss frequency synthesize technology. the mostly task is to study how to use the direct digital synthesis technology to design and realize the high speed digital mid - frequency modulator, and give the answers of the problems which emerge in the development
本文以某測通公司研究生產的「紅九」系統中遙測模擬組合子系統為背景，對其中的數字中頻調制器的研究開發進行探討，主要任務是研究如何用直接數字合成技術進行高速數字中頻調制器的設計與實現、並提出了研發過程中所出現的問題的解決方案。 -
Frequency modulator demodulator trainer
頻率調制調解學習套件 -
Thirdly, give the way to how to design the digital mid - frequency modulator, discuss the design process of the system, and give the block diagram of it
其次，對遙測模擬組合子系統中的數字中頻調制器的設計作了分析。給出了系統設計的過程與整個遙測模擬子系統的系統框圖。
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