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local oscillator     
相关语句
  本振
     The circuit is mainly composed of fore-tuner (FI1276) and Single Chip Micyoco (ADμC812), the local oscillator is controlled by I2C bus of ADμC812 and AGC voltage in FI1276 is sampled by Analog Digital Convert (ADC) system, then the input signal frequency measure may be realized in accordance with changing curve of AGC voltage.
     电路主要由前端调谐器FI1276和单片机ADμC812组成,由ADμC812的I2C总线完成对FI1276的本振控制,同时ADC系统进行FI1276内的AGC电压值采集,根据AGC电压变化曲线实现对输入信号频率的测量。
短句来源
     Design and Implementation of PLL Local Oscillator Based on ADF4217L
     基于ADF4217L锁相式本振
短句来源
     The frequency of the radiofrequency signal,local oscillator,and intermediate frequency are 2.452GHz,2.45GHz,and 2MHz,respectively.
     其中,混频器的输出级采用折叠级联输出,射频信号、本振信号和中频信号的频率分别为2 452GHz,2 45GHz和2MHz.
短句来源
     Design of L-band numeric microwave local oscillator
     L波段数字微波本振源设计
短句来源
     Utilizing the DR structure,the frequency stability of the local oscillator is less than 60×10~ -6 /℃.
     由于采用了介质谐振结构,本振的频率稳定度小于60×10-6/℃.
短句来源
更多       
  本地振荡器
     Design of 1GHz Local Oscillator with DLL -Based Frequency Multiplier Technique
     基于 DLL倍频技术的 1GHz本地振荡器设计(英文)
短句来源
     Design of local oscillator for GPS receiver
     GPS接收机本地振荡器的设计
短句来源
     As local oscillator by means of klystron type 2K25 is duo to K_1=l. 4Mc/volt(K_1modulation sensitivity of the klystron), then, K_2=15volts/radian and f_L= 42Mc/radian. Experimental results indicate, that the charaoter and the phase—loking of the system are very good.
     若用2k25速调管作为本地振荡器,k_1=1.4Mc/v,那么,k_2=15v/弧度,捕捉频带为42Mc/弧度,实验结果表明,仪器的性能与跟踪作用均为良好,为外差波谱仪的制作打下初步基础。
短句来源
     This system has been used as a local oscillator for the 13.7m millillimeter-wave radio telescope of PMO. Its operating frequency range is 75 ̄115 GHz and the output power is greater than 5 mW. By using the output signal of a servo amplifier to control the bias voltage of the Gunn oscillator, a lock-in bandwidth of more than 100 MHz is achieved.
     介绍了采用体效应管压控振荡器的W波段相位锁定系统,该系统在紫金山天文台13.7m毫米波射电望远镜中作为本地振荡器,可复盖75~115GHz的频率范围,输出功率大于5mw.用伺服放大器的输出信号控制体效应振荡器的偏压得到锁定带宽大于100MHz.
短句来源
     Secondly, the dissertation presents a 3-dimensional searching method with AFC and PN code synchronization and adaptive array convergence in order to accurately estimate the frequency difference between the received signal and the local oscillator.
     其次,为了准确估计接收信号和本地振荡器之间的频差,提出了AFC、PN码同步、自适应阵收敛的三维搜索策略。
短句来源
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  本机振荡器
     Reconstruction of the Local Oscillator with the Solar Radio Telescope at 2000Mc Wavelengths
     2000Mc太阳射电望远镜本机振荡器改造
短句来源
     Analyse mainly the frequency configuration,the local oscillator PLL circuit and the TR principle for the TS-940S HF transceiver.
     分析TS-940S高频收发两用机的频率结构、锁相环路本机振荡器电路以及它的收发原理.
短句来源
     Single frequency source is usually used as local oscillator in communication system and radar system, also as a reference clock in digital circuits, so it is a extensive-applied technique.
     固定频率源可以在在通讯系统和雷达系统中作为本机振荡器,也可以作为数字电路的基准时钟信号,因此得到了广泛的应用。
短句来源
     It can be used as the local oscillator in wave/spectrum analyser. It also can be used as a new digitally modulated FSK/PSK signal generator.
     它可用作为波形、频谱分析仪的本机振荡器,也可用作为数字调制的移频键控(FSK)、移相键控(PSK)信号发生器。
短句来源
     In this thesis,the new theory analysis is used on the VHF turer input circuit of type TJS-3、high-frequency amplifier、local oscillator、mixer circuit. The method mends the shortage of the relative books, and it also develops one's ability to analyse dealig with practical circuits and using electronic elements.
     对 TJS— 3型 VHF调谐器的输入电路、高频放大器、本机振荡器、混频电路进行了新的理论分析 ,弥补了有关现行理论书籍的不足 ,提高了人们分析实际电路和应用电子器件的能力
短句来源
更多       
  本地振荡
     The polarization direction of signal is required to match with that of local oscillator.
     在相干光通信等方面,要求信号光与本地振荡光偏振方向相匹配.
短句来源
     The ADF4360-7 synthesizer chip was used to generate local oscillator of GPS receiver.
     给出了利用ADF4360-7频率合成器芯片来产生全球定位系统(GPS)接收机本地振荡信号的方法。
短句来源
     Frequency Synthesizer (FS) is a very important block, which is used in a wireless transceiver as a local oscillator for frequency translation and channel selection.
     频率合成器是射频收发机中非常重要的模块,是用于频率转换和频道选择的本地振荡源。
短句来源
     The polarization direction of signal is needed to match with that of local oscillator.
     在相干光通信等方面,要求信号光与本地振荡光偏振方向相匹配,这就要求对偏振进行控制。
短句来源

 

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      local oscillator
    In an earlier communication on High Resolution Microwave Spectroscopy27) we described a spectrograph using a phase-stabilized klystron oscillator as a local oscillator in the detection system.
          
    The device was operated with the application of sufficient local oscillator power to double its dark current (about 0.3 mW) and a NEP of 2 x 10-19 W Hz-1 was deduced from heterodyne measurements.
          
    New modifications of the superconducting local oscillator (FFO) are developed, fabricated and tested.
          
    The microchip of the superconducting integrated receiver comprising local oscillator based on the long Josephson junction (flux flow oscillator, FFO) is developed and successfully tested.
          
    The results of room-temperature measurements of the mixer conversion losses and noise temperature as functions of the frequency and power of the local oscillator are presented.
          
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    This paper has described the fundamental principle of the automatic-phase-control system (A.P.C) and its electronic circuit.Two major characteristies of the system are considered: the capture ronge (f_L in Mc/radian) and the phase comparator constant (K_2 in volts/radian).As local oscillator by means of klystron type 2K25 is duo to K_1=l.4Mc/volt(K_1modulation sensitivity of the klystron), then, K_2=15volts/radian and f_L= 42Mc/radian.Experimental results indicate, that the charaoter and the phase—loking...

    This paper has described the fundamental principle of the automatic-phase-control system (A.P.C) and its electronic circuit.Two major characteristies of the system are considered: the capture ronge (f_L in Mc/radian) and the phase comparator constant (K_2 in volts/radian).As local oscillator by means of klystron type 2K25 is duo to K_1=l.4Mc/volt(K_1modulation sensitivity of the klystron), then, K_2=15volts/radian and f_L= 42Mc/radian.Experimental results indicate, that the charaoter and the phase—loking of the system are very good.

    本文简要地叙述了相位跟踪系统的基本原理,制作与调整,并且对所采用的方案的实验结果进行了初步讨论。若用2k25速调管作为本地振荡器,k_1=1.4Mc/v,那么,k_2=15v/弧度,捕捉频带为42Mc/弧度,实验结果表明,仪器的性能与跟踪作用均为良好,为外差波谱仪的制作打下初步基础。

    This paper describes a Gunn effect oscillator using the second harmonic as its output. The second harmonic power output of the oscillator is obtained by making use of the nonlinear characteristic of a Gunn oscillation. Thus with a single Gunn diode, functions of fundamental oscillation and frequency multiplication are accomplished simultaneously. According to this principle, a 94 GHz oscillator using 6mm-band diode has been developed, At a fundamental frequency of 47 GHz, the power output of the oscillator at...

    This paper describes a Gunn effect oscillator using the second harmonic as its output. The second harmonic power output of the oscillator is obtained by making use of the nonlinear characteristic of a Gunn oscillation. Thus with a single Gunn diode, functions of fundamental oscillation and frequency multiplication are accomplished simultaneously. According to this principle, a 94 GHz oscillator using 6mm-band diode has been developed, At a fundamental frequency of 47 GHz, the power output of the oscillator at the second harmonic 94 GHz is 20 mw. This new type of oscillator has been used as a laboratory signal source as well as the local oscillator in system applications.

    本文介绍一种具有二次谐波输出的体效应振荡器。它利用体效应振荡的非线性特性,在谐波频率上输出功率。因此只需一个体效应管,就可同时实现基波振荡和“倍频”功能。根据这个原理,采用六毫米波段的管子研制了94千兆赫振荡器。当基波频率为47千兆赫时,在94千兆赫频率上振荡器的输出功率为20毫瓦。这种新型振荡器已用作实验室测试信号源和整机的本振源。

    This paper discusses the noise temperature ratio of a mixer diode operated at DC bias and AC signal. The "effective diode noise temperature (td)etf" is defined to characterize the noise performence of the mixer diode pumped by a local oscillator. The relationship between the mixer diode noise temperature ratio and (td)eff is also given in this paper when conversion loss of signal is different from that of image.

    本文讨论了混频二极管在直流偏置和交流信号激励时的噪声温度比,提出了以“有效噪声温度比(tD)_(eff)”来表征二极管在交流激励下的噪声性能.文中还讨论了在信号及镜像频率的变频损耗不同时混频器输出噪声温度比和二极管噪声温度比的关系.根据分析结果对倒极性并联二极管对的噪声性能作了分析,表明这种复合管的(tD)_(eff)为一常数(0.5).这对降低混频器的系统噪声系数是十分有利的.可以相信:利用倒极性并联二极管对于研制优良性能的毫米波段混频器是一种很有希望的办法.

     
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