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- In view of universality, function generator with the core of high speed MCU uses the chips of DDS and FPGA.On the basis of generating routine sine wave, it can modulate signal frequency and range. 考虑到通用性,信号发生器以高速单片机为核心,利用DDS芯片和FPGA,在产生常规正弦波的基础上,还可以对信号进行频率调制和幅度调制;
- modulation signal frequency 调制信号频率
- In pulse code modulation,a spurious signal formed from beats between the signal frequency and the sample frequency. 在脉冲编码调制中,信号频率和取样频率之间的差拍所引起的伪信号。
- In pulse code modulation, a spurious signal formed from beats between the signal frequency and the sample frequency. 在脉冲编码调制中,信号频率和取样频率之间的差拍所引起的伪信号。
- Compared with the performance of normalized single pulse signal and linear frequency modulation signal (LFM), a new method is presented. 摘要从归一化的单脉冲信号和LFM信号性能比较分析入手,提出了一种新的分析方法。
- This paper proposed a digital modulation signal identification method using the HHT and SVM methods. 提出了一种基于HHT和支持向量机的实际数字调制信号识别算法。
- In automatic classification of digital modulation signal,computing envelope variance after difference has important meaning to distinguish PSK and FSK signal. 在数字信号的自动调制方式识别中,差分后求包络方差对于区分FSK、PSK信号具有十分重要的意义。
- This instrument can measure AC signal frequency either of the single phase voltage or of the tri-phase voltage. 本表既可测交流单相电压信号之频率,亦可测交流三相电压信号之频率。
- The Time Domain Wave Form and Frequency Spectrum of Modulated Signal of uexp( tt/ Pw) Multiply by Carrier with Uniform Phase Noise. 单边递减波电压讯号乘上含有均匀相位杂讯载波之调变讯号时域波形及频谱。
- The high permeability of the ferromagnetic reeds in a reed relay causes a pronounced skin effect with increasing signal frequency. 干簧式继电器中铁磁簧片的高磁导率会随信号频率的增加而产生很强的趋肤效应。
- The driver circuit comprises a switch, a pulsewidth modulation signal generator and a regulator coupling with the pulsewidth modulation signal generator. 驱动电路包括开关,脉宽调制信号产生器和与脉宽调制信号产生器耦接的调节器。
- It has sharp impedance characteristics at desirable frequency and it does affect the signal frequency. 在某一频率区域内,其阻抗值急剧上升,从而在特定的频率内可获得较高的衰减速效果而对信号不产生影响。
- The modulating signal is a slowly varying signal - as opposed to the rapidly varying carrier frequency. 调制信号是一个缓慢变化的信号作为反对以快变载波频率。
- A false signal in telecommunication links from beats between signal frequency and sampling frequency. 假信号信号频率和取样频率之间的拍子在无线电通信线路产生的假信号。
- The method tracks signal frequency by LMS algorithm and analyses the phase of output signal. 通过采用最小均方误差自适应滤波算法 ,跟踪信号的单一频率 ,分析输出信号的包络 ,实现PCM/FSK信号的解调。
- The Time Domain Wave Form and Frequency Spectrum of Modulated Signal of Rect(tt/Pw) Added by Uniform Noise. 方波电压讯号加上均匀杂讯乘以无杂讯载波之调变讯号时域波形及频谱。
- They can also be helpful if the original signal frequency does not fit in the DUT testing frequency. 如果原始信号频率不适合于DUT的测试频率,信号滤波也非常有用。
- frequency modulation signal demodulation equipment 调频信号解调设备
- If the signal frequency to be measured is low, wide strobe gate is required for high measurement precision. 当被测信号频率较低时,需要很宽的选通门才能得到较高的测量精度。
- When there is a modulated signal from transmitter, there are side bands. 只要在发射机中存在调制信号,就含有旁频带出现。