The hardware is mainly composed by 8031, A/D, and frequency counter, and the software is simple and efficient.
硬件主要以8031单片机为核心构成一个最简系统，软件简短有效。
The 5315B Frequency Counter has a 100MHz frequency range and also has ratio and totalize measurement capabilities.
在5315B频率计数器有一个100MHz的频率范围，也有比例，总计测量能力。
The frequency counter has ben applied successfully to a piezoelectric crystal chemical sensor for determining SO_2 and organic vapours.
该仪器性能稳定、操作简便、价格低廉，已成功地用于二氧化硫和有机物蒸汽测定的压电石英晶体传感器的研制。
One example of a multiple closure would be to route a single device output to two instruments, such as a voltmeter and a frequency counter.
复用开关的一个简单例子就是将单台设备的输出连接到2台仪器，例如一台伏特表和一台频率计数器。
Full-automatic box folding-gluing machine features stable performance, simple operation, and adopts control by imported variable frequency counter, to achieve stable, accurate and quick production.
全自动糊盒机系列具有性能稳定，操作简单，采用进口变频计数控制，达到稳、准、快的目的。
Counter functions provide frequency and time interval measurements.
反函数提供频率和时间间隔的测量。
The disadvantage of high precision frequency accuracy measurement method available is that an expensive high-resolution time interval counter is needed.
常用高精度校频算法的不足在于需要昂贵的高分辨时间间隔计数器。
Owing to the limited frequency of the internal high-speed counter of PLC, the peripheral unit of PLC is used for PLC-based frequency measurement of hydraulic turbine governors.
基于可编程序控制器（PLC）的水轮机调速器，受PLC内部高速计数器最高计数频率的限制，频率测量大多通过PLC外部单元来实现。
This paper discusses the results of system simulation of linear frequency modulation pulse-compression radar and draws some conclusion on its capability of counter-jamming.
通过噪声干扰、噪声调幅干扰和移频干扰对脉冲压缩雷达的干扰仿真得出了一些有意义的结论。
In the method, GPS is looked on as reference and the frequency difference between the Rb clock and GPS may be obtained indirectly, and the expensive high-resolution counter may not be needed.
该方法将GPS作为频率基准，间接得到了铷钟相对于与GPS的频差，避免了使用昂贵的高分辨计数器。
This paper analyses reasons of reading error during counter sampling of separated frequency and CTC, propose the solutions and nonlinearity correction with computer software.
分析了分频和CTC计数采样中误读数的原因和解决方法，并利用微机软件实现非线性校正。
Suppose that Enable is high, the counter counts up every clock cycle, and the frequency of the PWM output is the clock frequency divided by 2 count bits.
假设高信号使能，计数器每个时钟周期进行计数，PWM输出的频率为时钟频率的2次幂分频。
The paper introduces the principle of frequency measure based on double-counter and multi-periods pulse synchronization method, and the designing with microprocessor is offered.
介绍了双计数器多周期同步法频率测量原理，给出了用单片机实现的具体实现方案。
Nc divider design: an adder counter, loading the initial count value, have different frequency output signal of the overflow.
数控分频器设计：对于一个加法计数器，装载不同的计数初始值时，会有不同频率的溢出输出信号。
This paper presented a new counter-countermeasure method, known as two way anti frequency coherent method, to counter the noise frequency modulation disturbance.
该文针对接近白噪声的小指数调频干扰提出一种新型反干扰的方法：两路倒频相关法。
Digital Radio Frequency Memory (DRFM) can store radar signal coherently for a long time, it provides powerful means to counter new radar systems.
数字射频存储器(DRFM)可以对雷达信号进行长时间的相干存储，为干扰现代相干体制雷达提供了有力的技术手段。
To counter the effects of joints on the production of coal mine, the paper advances a new method to forecast the frequency of joints in coal bed and its roof.
针对节理对煤矿生产的影响。本文提出一种预测煤层及其顶板节理频率的新方法。
The output of the FPGA is typically a waveform with a fixed-frequency, variable-duty cycle, which a counter and a digital comparator generate (Listing 1).
FPGA的输出是固定频率、计数器和数字比较器使占空比可变的典型波形(表1)。
The advantage and importance of digital radio frequency memory (DRFM) technique in radar counter measures (RCM) are discussed. The principle of DRFM is introduced.
论述了数字射频存储器(DRFM)技术在雷达对抗中的作用和重要性，介绍了DRFM的原理。
The third counter starts counting in the first clock frequency when receiving the enabling signal, and stops counting when the enabling signal stops.
一比较器，接收上述第一计数器及上述第二计数器的计数值，以产生一致能信号输出；
The third counter starts counting in the first clock frequency when receiving the enabling signal, and stops counting when the enabling signal stops.
一比较器，接收上述第一计数器及上述第二计数器的计数值，以产生一致能信号输出；
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