基于多总线的分布式自动化测试系统设计

针对待测电子系统规模不断增大、逻辑结构日趋复杂的问题,提出一套实用的分布式自动化测试理论,基于层次结构设计方法,有效结合连接测试仪器的多种总线结构和分布式网络技术,通过对管理终端、传输信道、测试仪表及其附属设备的综合集成,构建自动化、网络化和标准化的综合测试系统,满足电子信息系统的大型化和一体化发展需求。该测试系统的可行性在某大型电子信息系统的指标测试评估阶段得到实例验证。     

基于PXI总线的导弹引控自动测试系统设计

针对某型导弹引控系统现有测试设备测试仪器分散、连接复杂、自动化程度低、耗费高等问题,提出一种基于PXI总线技术的自动测试系统(ATS)设计,实现测试系统的自动化、模块化及通用化,降低测试系统的规模,节约研发成本。描述了测试系统的结构和组成,给出了测试系统的硬件设计及软件设计。重点介绍模块化仪器的选择、电源模块的设计及软件的测试流程。经论证,系统设计合理、测试准确、自动化程度高,满足测试需求。     

基于python的EDFA瞬态测试系统研究

为了减少测试过程中人为因素引起的误差,提高掺铒光纤放大器(EDFA)的测试质量和效率,文章基于python语言设计了能快速测试EDFA瞬态的自动测试系统。根据EDFA的工作原理和速率方程,联系光纤通信过程中产生瞬态的原因设计了合理的测试方法。利用接口总线实现了该系统可由一台计算机同时控制多台测试仪器,并且通过python语言实现仪器设备的自动化控制和"一键式"自动保存各个仪器设备的测试数据和图形。实验结果表明,该系统测试精度较高,操作方便,可扩展性好,能够充分满足用户对瞬态测试的要求。     

Networking automatic test equipment environments

Automatic test equipment (ATE) is a term that, in its broadest meaning, indicates a generic system capable of performing measurements in an automatic or semiautomated (human-assisted) way. Years ago, this term was used specifically to refer to an automated measurement system employed to test the functionality of some electronic device-under-test (DUT). Typical applications were in the manufacturing area, where ATE had a twofold nature: in-circuit testing and functional testing. For in-circuit testing, ATE often were stand-alone complex programmable machines, equipped with a bed-of-nails adapter specifically designed as a fixture to provide signal inputs and meaningful test-points of the DUT. The test engineer had the responsibility of writing code that determined the exact sequence of stimulus signals, response measurements, and go/no-go decisions. For this aim, a switch matrix and the ATE itself were suitably controlled and coordinated by a workstation. For functional testing, ATE consisted of off-the-shelf instruments connected to the DUT by some kind of front-end adapter. In the latter case, most of the effort of the test engineer consisted of designing a program to control the various instruments to assess DUT performances. When planning the use of a dedicated testing machine as opposed to a test bench, other factors were taken into account: measurement speed, cost, and fault coverage.     

Low Cost Signal Reconstruction Based Testing of RF Components using Incoherent Undersampling

To meet the testing requirements of high speed components used in modern communication systems, in an efficient and cost effective manner, it is necessary to develop new device performance measurement techniques that are easily scalable to high frequencies. Traditional up/down conversion based transmitter testing architectures are sensitive to the linearity of the mixers and carrier phase noise in the receiver. Direct undersampling based test instrumentation can overcome the limitations imposed by mixers in up/down conversion. A major challenge in direct undersampling based test architecture is to achieve precise phase alignment between different components of the test setup. Such phase alignment of high frequency signals requires the use of expensive test instruments adding to the cost and complexity of the overall test system. To resolve this problem, an incoherent undersampling based test method is developed in this research that eliminates the need for precise phase synchronization between the RF test signal carrier, its amplitude-modulated envelope (generally necessary for measuring amplifier nonlinearity) and the reference sampling clock. A side-benefit, due to the use of signal undersampling, is that signal acquisition is achieved without the use of a Nyquist rate data converter. Multiple RF performance metrics are extracted without the use of a reference receiver. The accuracy of the proposed setup is compared against existing coherent sampling based test setups.     

阵面电源自动测试技术研究

阵面电源作为相控阵雷达的主要部件之一,因其使用数量较多,为提高测试效率和精度,需要建立能够完成多项性能指标测试的阵面电源自动测试系统。介绍了阵面电源自动测试系统的组成及原理,系统采用NI公司的Labview虚拟仪器软件平台集中控制电源、负载和测试仪表,自动进行电源静态特性、动态特性以及电磁兼容和热特性测试,并基于数据库对测试数据进行管理和后处理。     

A Polylithic Filter Channel Bank

The advent of AT-cut quartz crystal resonator filters has made possible the design of high-quality channel translation equipment with reduced cost and size. This paper describes a new channel bank, with built-in carrier generation, employing 8-MHz polylithic crystal filters for sideband selection and singleresonator filters for carrier selection. Integrated and hybrid thick film circuits have been used to provide increased reliability and size reduction The modulation plan, equipment design, and performance are discussed.     

多波束测向设备的自动测试方法

本文研究了多波束测向体制设备的自动测试方法,分析了影响多波束测向的因素,设计了对多波束通道一致性和测向性能的自动测试、调试系统,该自动测试、调试系统能快速、准确地测出通道一致性及测向误差精度,找出匹配不好的通道及频段,减少了多波束测向的调试工作,节约了人力,缩短了生产周期。在装备生产的过程中,该自动测试系统得到了重要的应用。     

消防装备检测仪器的维护保养与检查

随着消防装备技术的发展,越来越多的消防装备检测仪器应用到消防工作中,为了提高检测结果的准确性,需要对检测仪器进行定期的维护保养。同时,对可能出现故障的仪器要及时进行现场检查,确保仪器在工作时的可靠性,提高对消防装备的保障能力。     

浅谈两台IC分选机并行测试方法

随着半导体行业测试技术不断提高,IC分选机技术不断升级,昂贵的集成电路测试设备是导致集成电路测试成本偏高的主要因素。如何最有效地使用好现有设备,充分利用设备资源,降低测试成本,提高测试效率,是工程技术人员需要探索的问题。从如何实现两台IC分选机并行测试展开具体的说明,详细介绍两台IC分选机与测试系统并行测试的通信原理,以及实际工作中的一些注意事项,避免出现质量事故,并通过试验说明并行测试的优越性。     

基于虚拟仪器的数据链测试模拟器研制

针对传统数据链测试设备功能单一且不易重构的问题,借鉴虚拟仪器模块化的设计思想,设计实现了一种基于美国国家仪器公司（National Instruments,NI）通用软件无线电平台的数据链测试模拟器。该模拟器采用线性调频信号叠加（Sum of Linear Frequency Modulation,SoLFM）的方法高效产生具备连续相位的时变信道衰落,包括瑞利衰落、莱斯衰落和对数正态衰落等,并结合多相滤波思想能够精确模拟数据链长时延的多径传播场景。利用矢量网络分析仪对硬件模拟器输出的信道传递函数和信道冲激响应进行实测验证,并对各支路的随机信道衰落包络分布进行统计验证。实测结果表明,该数据链测试模拟器输出的信道函数和统计分布均与理论值吻合,因而可用于数据链装备的系统优化、验证和性能评估。     

Loop Test System: A New Maintenance Feature for the Distributed Integrated Digital Network

The introduction of the digital Class 5 switch offers unique solutions to the requirements of growth and demands for improved service. For example, remote subscriber switches (RSS's) and subscriber carrier terminals (SCT's) can now be located near subscribers and digitally connected to the Class 5 switch via T1 repeatered lines or radio links. The result is shorter subscriber loops, improved transmission, and deferment or elimination of feeder plant additions. Traditionally, interposing electronics between the subscriber loops and the Class 5 switch resulted in isolating these loops from the office loop testing facilities. Remote testing of RSS and SCT assigned loops is an important step toward minimizing maintenance costs. Loop testing is accomplished in TRW Vidar's ITS5 switching system by locating loop test equipment in the remote RSS and SCT cabinets. This equipment is available to the test operator for real-time testing, and to the switch for automatic line testing. Some of the requirements that the loop test equipment must meet are: low cost, no adjustments, low power consumption, small size, operation in a harsh environment, and centralized testing capability from a test console. The data returned to the office must be in a quantitative form to allow further processing by the console. It must also be compatible with the direct distance dialing (DDD) network to allow transmission not only to the Class 5 switch serving the RSS and SCT, but also to distant service centers. This paper describes a newly developed system that meets the above objectives.     

一种基于GPIB的自动测试系统实现方法研究

介绍了基于GPIB接口和LabVIEW软件平台组建自动测试系统的方法。所设计的测试系统通过GPIB接口总线实现PC机与通用测试仪器之间的通讯和对仪器的控制。探讨了测试系统的硬件构成、应用程序设计思路及具体的实现方法。该系统已在某型装备分机测试中取得很好的效果,提高了测试的自动化程度、测试效率和精度,易于扩展。     

军用通信装备测试平台系统设计

针对目前多种通信装备并存带来测试仪表种类多、效率低、体积庞大的问题,本文研究了基于软件无线电和可重构技术的通信设备通用测试平台.在同一硬件平台下通过调用不同的配置数据和不同的应用程序实现了宽频带的多种调制和解调,实现对多种装备的测试.已完成的实验表明这种功能开放式的平台可以快速改变配置,从而可以取代原有的多种仪表应用于对多制式电台的性能参数的自动测量.满足了多制式通信装备的测试需要,也适应未来测试需要的发展.     

移动终端音频测试平台的建设

通话是移动终端最基本的功能,而音频质量是否优良直接影响到了通话质量。对音频指标进行准确的客观测试是保证通话质量的前提。精确的测试平台和准确的测试方法是客观测试的基础。测试平台的搭建需要考虑以下方面的客观测量与主观评测的符合性、仪器的精度要求和校准方法、系统的准确性和再现性、测试方法的可操作性,另外还要考虑系统的兼容性和可升级性,综合以上各种需求后经过方案设计、设备选型和系统调试后就可以进行测试和验证。     

生产线用安规测试仪器的运行检查

以抗电强度、接地电阻测试用安规测试仪器为例,介绍了工厂用于生产线上的检测仪器运行检查的要求和检测方法,并比较了各种常用运行检查要求和方法的优缺点,对工厂根据自己使用的仪器设备和生产要求来选择合适的运行检查方法有一定的参考作用和指导意义。     

On trends in automatic testing of analog circuits

The rapid change and the turmoil characteristic of the electronics industry today, is evident also in analog testing field. Because an analog electronic circuit or device may be tested many times during its life-time, analog testing has become a significant component of life cycle cost. In this paper, we discuss briefly the emerging trends towards test techniques; testlanguages; test system architectures; test instruments; test computers; and test requirements as related to analog testing field. The topics discussed assume a new importance, however, as VLSI introduces more analog circuits into the digital domain.     

IP网络设备多业务叠加测试方法探讨

从通信产业的发展趋势出发,分析了IP网络设备选型测试的需求变化,阐述了目前传统测试方法的局限性。通过参照运营商未来业务的演变,以核心路由器为例阐述了多业务叠加测试模型的建立及具体实现过程,提出了IP网络设备多业务叠加测试的新方法。最后,通过与传统单项测试的效果比较,为运营商IP网络设备测试提供了一种更为有效的可行方法。     

ATE测试成本优化

多点测试是降低片上系统测试成本的有效手段,目前支持多点测试的ATE(自动测试设备)越来越多。多点测试通过并行测试多个芯片降低了测试成本,但是如何选择多点测试使得测试成本最低,需要综合考虑多方面因素,包括ATE成本、芯片的测试策略等。文中从ATE出发,建立芯片的测试成本模型,通过该模型获得了最佳测试方案。     

采用虚拟仪器技术的电子设备通用检测系统

现代自动测试系统中,越来越多地应用虚拟仪器作为激励仪器和测量仪器。介绍了采用虚拟仪器实现的某装备的通用检测系统,阐述了该系统软件和硬件的设计思想。