By timing how long the signal takes to make the return trip, the instruments can determine differences in height.
通过计算信号往返需要的时间，仪器可测定差距高度。
Virtual instruments is a combination product of the digital signal processing and computer technology, generally composed of hardware platforms and software applications.
虚拟仪器是数字信号处理与计算机技术相结合的产物，一般由硬件平台和应用软件两大部分构成。
The use of instruments and control systems based on computers or microprocessors is forcing increased use of this type of signal.
基于计算机或微处理器的仪器或控制系统的应用正推动这类信号的应用不断增加。
It is used for temperature measurement instruments and system that is an analogue signal output.
用于需要有模拟信号输出的温度测量仪表和系统。
But by the time astronomers had noticed it and set their instruments up to double-check, the signal had vanished.
但是等到天文学家发现并且使用仪器进行二次确认的时候它已经消失了。
On this platform, DSP algorithms not only improve test resolution, but also take place of some instruments, which can accomplish more functions, such as signal generator, signal analyzer, etc.
在这一通用仪器硬件平台上，采用不同的数字信号处理算法，不仅可提高测试准确度，而且还可代替某些仪器，完成从信号产生到信号指标解析等多种测试功能。
Signal generator is very important in modern electronic instruments. It is widely applied in many fields such as communication, navigation, radar, measure and control.
信号发生器是一类十分重要的仪器，在通信、测控、导航、雷达、医疗等领域有着广泛的应用。
Waveform analyzer is one of the most important signal measuring instruments, which can accurately analyze the characteristics of the signal in time-domain and frequency-domain.
波形分析仪是最重要的信号测量仪器之一，可以对信号时域特性、频域特性以及相关特性作高精度分析。
In the paper, the travel law of seismic wave which is excited by explosive shock, and the relation between the vibration signal of ground and electric signal recorded by instruments are discussed.
讨论了爆破地震产生的地震波传播规律，以及地振动信号和仪器记录的电信号之间的关系。
However, the traditional measuring instruments such as DSO, DMM, Logic Analyzer have only focus on a certain number of signal or electrical parameters.
然而，传统的测量仪器如示波器，万用表，逻辑分析仪等都只是针对某一些信号或者电参数的测量。
Generally speaking, it first implements the signal acquisition on special instruments, and then realizes the data display and measure function by virtue of software programming.
一般来说，它先通过仪器硬件采集信号，然后通过软件编程来实现数据的显示及测量等功能。
To provide intelligent instruments with the cheap interface of the standard current sign, the RC low pass filter is used for producing a voltage signal which is proportion to PWM's duty rate from PWM.
为了给智能仪表提供廉价标准电流信号输出接口，可以使用RC低通滤波器，从PWM中分离出与占空比成正比的线性直流电压信号。
With PXI modular instruments, engineers specify the essential functionality they require - choosing from a wide variety of measurement, signal generation, RF, power and switch modules.
由于具备PX I模块化仪器，工程师们可以从大范围的测量、信号发生器、RF、功率和开关模块中选择，明确地指定他们所需要的功能。
Our signal and laboratory calibrators are multifunction instruments designed to check and calibrate your test and process equipment.
多功能仪器，用以校对并调整实验和加工设备。
Be practiced in using of the common RF test and analyzing instruments, such as Signal Generator, Oscilloscope, Spectrum Analyzer , Impedance Analyzer and Net Analyzer;
熟练使用信号源、示波器、频谱仪、阻抗分析仪和网络分析仪等常用射频测试仪器进行测试、评估和调试；
For level instruments required to send signal remotely, diaphragm sealed differential pressure level transmitter, displacer transmitter and radar transmitter shall be selected.
远传指示液位仪表一般选用双法兰差压液位变送器、浮筒液位变送器及雷达液位变送器等；
The high-speed signal collecting and processing system is widely used in the field of communication, control, instrument and medical instruments etc.
高速信号采集与处理系统广泛应用在通信、控制、仪器仪表、医疗等领域。
On the basis of researching the development of domastic oil logging instruments, a universal acquisition and processing system for logging signal based on DSP is presented in this paper.
该系统以DSP为核心，用软件手段实现多种测井信号的采集和处理，对于石油测井目前以硬件为主要手段的现状来说，具有很大的实际意义。
CXA N9000A signal analyzer is a member of the X series of test instruments, which is the comprehensive use of the instrument, measurement and software for signal analysis of the evolution method.
N9000A CXA信号分析仪是x系列测试仪器中的一员，它是综合利用仪器、测量和软件进行信号分析的演进方法。
Typical RF & uW instruments: signal generators, spectrum analyzers, network analyzers, power meters, receivers and so on;
典型的射频微波类测试仪表：信号源、频谱分析仪、网络分析仪、功率计、接收机等等；
Proficiency in the use of common test measuring instruments, such as frequency spectrum, signal source, oscilloscope, etc.
熟练使用各种通用测试测量仪表，如频谱仪、信号源、示波器等。
The abilities of long distance communication and weak signal detection are deteriorated by various white noises existing in the electronic instruments and system.
工程中常遇到各类噪声信号，噪声存在于电子设备和系统中，它经常妨害长距离通信和检测弱信号的能力。
It requires secondary transformation to transform the voltage into usable signal for electronic measuring instruments.
需进行二次变压，才能将电网上的信号变为电子测量装置可用的信号。
Instruments based on the lower limit of two switch-contact device, the pressure to set a signal or when the value of on-off control circuit for the operating system's automatic control or the use.
仪表设上、下限二位开关型接点装置，在压力达到设定值时发出信号或通断控制电路，供作业系统自动控制或发讯用。
Since current typical data acquisition instruments are not adapted to different type or different range input signal, a kind of general purpose data acquisition interface instrument was developed.
针对目前典型数据采集装置输入端子对不同类型、不同范围的输入信号不能通用的状况 ，研究了一种通用数据采集接口装置。
Using this signal, we can unify the work time of all the instruments of the accelerator, and the touch off signals are related from each other, the twitter among the signals is small.
采用这样的方式，可以做到统一管理触发，并且各个延时触发信号之间具有相关性，彼此间的晃动比较小。
Using this signal, we can unify the work time of all the instruments of the accelerator, and the touch off signals are related from each other, the twitter among the signals is small.
采用这样的方式，可以做到统一管理触发，并且各个延时触发信号之间具有相关性，彼此间的晃动比较小。
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