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- Since outputs of the master laser are antiphase for direct modulation and external modulation, the fluctuations of similarity index with modulation frequency for the two lasers are contrary. 由于内部、外部调制引起主激光器的输出反相,两种调制方式下同步品质随调制频率的变化趋势也相反。
- External Modulation Frequency 外部调制频率
- And higher modulation frequency can be achieved with small current aperture and adequate spontaneous emission factor. 通过减小VCSEL电流孔径、适当增大自发辐射因子可以实现比边发射器件高几倍的传输速率;
- In addition, the automatic gain control circuit and accessional phase modulation circuit are designed in order to control light power on the stage of external modulation. 另外设计了自动增益控制电路和附加相位调制电路,对外调制阶段的光功率进行控制。
- If this modulation frequency is present the output of the comparator will be low. 如果这是本调制频率的输出将是比较低。
- It is convenient to change the optical intensity of the sidebands by tuning the DC bias voltage while the microwave modulation frequency and power are fixed. 当微波调制频率及功率一定时,可方便地调节直流偏置电压来改变各阶光波的强度。
- Experimental data show that the intensity modulation depth increases with the bias current of LD.When the modulation frequency increases,the intensity modulation depth decreases. 实验数据表明,光强调制度随激光器偏置电流的增加而加深,随调制频率的升高而减小。
- The character of FSK spectrum is centrosymmetric, spectrum peaks spread with an interval of the modulation frequency, so the right frequency cannot be got by FFT spectrum. 移频信号的频谱特性是谱峰以新出现的边频频率为中心,以低频频率为间隔向两边展开,通过FFT谱分析不能得到精确的结果;
- A novel scheme for optical millimeter-wave generation with double-sideband (DSB) modulation by external modulator in a radio-over-fiber (ROF) system was proposed. 提出了应用于光纤无线通信系统中一种改进的双边带调制产生光毫米波方案。
- Right now Psyco is an external module, but it could someday be included in Python itself. Psyco现在是个外部模块,但是在将来的某一天它可能会包括到Python本身中去。
- On larger scripts that "stand alone" without a lot of external module use, you should see a noticeable improvement. 在大型的没有使用外部模块的“独立”脚本中,您应该会看到速度有明显的提升。
- The characters of this improved circuit are not only low phase noise and high stable carrier but also ideal AF modulation frequency response, excellent anti-vibration and temperature performance. 该电路不仅具有低的相噪、高稳定的载波,还具有理想的音频调制频响、优良的抗震动性能和温度性能。
- The foundation is given to design the good external modulator optical transmitter by calculating CSO. 为设计性能良好的外调制光发射机 提供了依据。
- The change of the modulation frequency will change the corresponding frequency value of the protuberant part on the PSD curve, and at the same time the peak value of the protuberant part is changed. 当调制频率不同时,PSD曲线的突变部分会发生相应的频移,调制频率高则突变发生在空间频率较高的频段,同时PSD峰值不变。
- To solve the problem of sky-high modulation frequency requirement in MOG (Micro-Optical Gyroscope), a new double-frequency modulation technology based on triangular wave was proposed. 对微光学陀螺双频率调制中需要极高调制频率差的问题,提出了一种基于三角波的双频率调制技术。
- The signal quality of these two signals under the transmission through the external modulated lightwave are hence studied using the proposed theory. 输入至电光调变器时,这两种型式的电场讯号经过电光调变器的光波传输后,可以使用本论文所提出的理论来研究其讯号的品质。
- An advantage of resolution is they use simple setting only a cursor, measurable the modulation frequency of the radio system that cannot survey with common frequency tally or parasitism frequency. 分辨率的一个优点是他们只用简单的设置一个光标,就可测量用通俗频率计数器无法测量的无线电系统的调制频率或者寄生频率。
- From the view of external modulation by using the method of ratio of small earthquakes modulated by solid tide, we quantitatively analysed the small earthquake activities in Urumqi and Alma Ata. 利用固体潮小震调制比方法,从外因调制的角度出发,定量研究新疆乌鲁木齐和苏联阿拉木图地区小震活动。
- Identical epitaxial External modulation 外调制
- Objective To observe the effect of modulated frequency sinusoidal electrotherapy on experimental renal failure in rabbits. 目的探讨正弦调制电流对实验性肾功衰竭的治疗作用。