Design of Automatic Test System for Multi-channel Digital Receiver Module

In order to solve the problems of information interaction, instruction transmission and joint interpretation in the multi-cabin configuration of space station, an automatic test system supporting multi-cabin joint test is designed. The general design of automatic test system is given. To standardize the interface and protocol for information transmission in each cabin. Design multi-dimensional interpretation platform to realize multi-cabin data comparison and interpretation. Developing comprehensive analysis platform to realize multi-cabin information association analysis. The application results show that the multi-cabin joint test of the space station is realized automatically and intelligently through the test case design, test program execution, data interpretation, test result analysis and report generation. It supports the ground test and verification work under various configurations of the space station, and has high engineering application value.

The design of automatic test system based on VC++ implemented the communications between the spectrum analyzer and PC. USB-GPIB Interface board is used, USB with its unique advantages of strong anti-interference?high speed and easy to use make the application of automated test system based on GPIB more extensive and flexible. This paper describes the working principle of the test system and the design of hardware as well as software. And complete the procedures of host computer for spectrum analyzer automated test system in VC + +6.0 environments.

In digital radio applications, error-vector-magnitude (EVM) is the primary specification which quantifies the performance of digital modulation implemented in silicon. Production testing of EVM incurs high cost of test instrumentation in automated test equipment (ATE). For EVM testing of wireless receivers, the ATE must include an RF transmitter having (1) the required digital modulation capability, (2) transmitter parameter configurability via test automation software and (3) higher performance and accuracy compared to the receiver-under-test. In this paper, an alternate test methodology for the EVM specification is proposed that eliminates the need for high cost RF sources with digital modulation capability. A sequence of multi-tones generated using low-cost RF sources is used as test stimuli. The EVM specification is computed (predicted) by analyzing the degradation of the test signal by the receiver modules (e.g. LNAs, mixers, filters) by means of the observed waveforms in the baseband. Simulation results are presented.

Following the test work is difficult and complex in the modern radar maintenance support, the automatic testing of radar board is necessary for the radar maintenance man. A automatic test system of radar board based on virtual instrument technology is discussed. The system used PXI bus technology and Labview program language. The design of automatic testing system is given, its hardware solution and software solution is designed. And finally the reliability and expansibility of system design is discussed at last.

This paper presents an automatic test system which can output one 2Mbit / S PCM signals and one 10.2Mbit / S PCM signals for the device testing; the system wih self-test function could calibrate the output two PCM signals; when the equipment is in the state of testing, you can real-time monitor the status of the device through the PC

Ventilator is an important medical instrument which can replace the function of autonomous ventilation artificially. Its safety and reliability are related to the health and even life safety of patients. With the publishing of the new national standard and international standard for ventilators, higher requirements are put forward for the detection and evaluation. This study mainly introduces an automatic test system for ventilator performance. The test system is based on PF-300 air-flow analyzer of Imtmedical and standard simulation lung. The automatic switch module of simulation lung is developed, and the automatic test system of ventilator is designed using the software development platform based on Python. It can not only automatically test all ventilation control parameters and monitoring parameters of the ventilator, but also realize automatic data recording, form reports and data analysis, and improve the efficiency and quality of inspection, detection and quality control.

Aimed at the characteristics of permafrost temperature influencing the safety of Qinghai-Tibet Railway and its on-line testing system, comparing the achievement of permafrost study nationwide with those worldwide, an automatic testing system of permafrost temperature, containing a master computer and some slave computers, was designed. By choosing high-precise thermistors as temperature sensor, designing and positioning the depth and interval of testing sections, testing, keeping and sending permafrost temperature data at time over slave computers, and receiving, processing and analyzing the data of collecting permafrost temperature over master computer, the change of the permafrost temperature can be described and analyzed, which can provide information for permafrost railway engineering design. Moreover, by taking permafrost temperature testing in a certain section of Qinghai-Tibet Railway as an instance, the collected data of permafrost temperature were analyzed, and the effect of permafrost behavior was depicted under the railway, as well as, a BP model was set up to predict the permafrost characteristics. This testing system will provide information timely about the change of the permafrost to support the safety operation in Qinghai-Tibet Railway.

Under the background of the test equipment adopting the generalized platform hardware environment, an automatic test system design implementation method is proposed, which will divide the test resource information into test elements such as device library, ICD library, use case library, etc., and refer to the test standard to describe the characteristics and test elements of the language ATML. Classify test case descriptions as standard incentive response commands and use common test software to complete the automated testing process. The automatic test system integrates key test elements such as test data, test strategy and requirements, test steps, test results management, and provides the overall system structure resources, test description, test results, configuration information, public information, etc., and solves a series of problems brought about by manual detection and maintenance.

Nowadays, the bioelectromagnetic field has been accepted, and more and more scientists are concerned about the bioelectromagnetic effect from external electromagnetic field. But few scientists study the bioelectromagnetic spectrum, which features may be used to identify the living beings. In this paper, we give a method to measure the bioelectromagnetic field. At first, we study the theory of measuring the bioelectromagnetic signal. Furthermore, we designed an automatic test system (ATS) based on the theory. The automatic test software, an important part of the ATS, which can control the instruments such as spectrum analyzer, poisoning controllers, etc, is introduced by the diagram. Finally, the measurement data are calculated and recorded to a text file, which can be used to analyze the bioelectro-magnetic spectrum. We also display the 3D graph of the bioelec-tromagnetic field vs. each frequency, to study and view the direction of bioelectromagnetic field. The automatic system has been applied in our research about mice's bioelectromegnetic field test, and works well.

Nowadays, the bioelectromagnetic field has been accepted, and more and more scientists are concerned about the bioelectromagnetic effect from external electromagnetic field. But few scientists study the bioelectromagnetic spectrum, which features may be used to identify the living beings. In this paper, we give a method to measure the bioelectromagnetic field. At first, we study the theory of measuring the bioelectromagnetic signal. Furthermore, we designed an automatic test system (ATS) based on the theory. The automatic test software, an important part of the ATS, which can control the instruments such as spectrum analyzer, poisoning controllers, etc, is introduced by the diagram. Finally, the measurement data are calculated and recorded to a text file, which can be used to analyze the bioelectro-magnetic spectrum. We also display the 3D graph of the bioelec-tromagnetic field vs. each frequency, to study and view the direction of bioelectromagnetic field. The automatic system has been applied in our research about mice's bioelectromegnetic field test, and works well.

The article adopts the bus technology to build the automatic test equipment, including the intelligent interface, the data acquisition system composed of the bus module instrument and the automatic test software with VEE as the development environment. The intelligent interface successfully solves the mutual isolation of the detection signals provided by the test object; the use of the bus module instrument greatly improves the hardware reliability of the entire automatic test equipment; the use of VEE to develop automatic test software reduces the complexity of software development, Shorten the development cycle and ensure the reliability of the automatic test software.

This paper proposes two low-cost jitter generators for high-speed I/O interface jitter tolerance testing. (i) The first one uses inter-symbol interference positively with digital control. The proposed circuit consists of mostly digital circuits with small amount of analog circuits (simple RC low-pass filter), and the digital part can be realized using FPGA or high-speed digital unit of an automated test equipment (ATE). (ii) The second one uses a digital AS modulator with some amount of analog circuits, and the digital part can be realized using high-speed digital unit of the ATE; the digital AS modulator can be realized by software on the ATE, and its output controls switches in the analog circuits. Their principles, theoretical analyses and simulation results are presented.

Mixed signal circuits typically require more complex specification based testing as compared to digital circuits, which can be completely tested with structural or simple functional tests. Due to the analog nature of some of the internal nodes and external signals in mixed signal circuits, qualitative functional tests may be required to assure circuit performance at all operating points. Mixed signal blocks such as Analog to Digital Converters (ADC) and Digital to Analog Converters (DAC) act as interfaces between the digital processing modules of the System on a Chip (SoC) and interfacing analog domains. These converters are increasingly common on SoCs due to ever-increasing presence of real world analog signals that use the processing capabilities of the digital blocks. High volume production testing of these mixed-signal components is inefficient due to test complications, resulting in the use of high-performance Automatic Test Equipment (ATE). While various Built-in Self Test (BiST) schemes are proposed to provide the analog test stimulus, the conventional histogram analysis method is still in use for the majority of ADC testing applications. We review a proposal for ADC output test involving a functional pattern, effectively resulting in a real-time-code-analysis. Memory and processing constraints for the ATE are reduced as this vector based method is not ATE memory intensive while providing an output quality measure identical to the conventional histogram method.

: This effort evaluated the effects of enhancing automatic test equipment hardware and software on the test program sets currently on the Automatic Test Equipment. Objective was to determine the relationship between the hardware and software of the Automatic Test Equipment and the Test Program Sets operating on the System.

The following topics are dealt with: automatic test equipment; fault diagnosis; automatic test software; maintenance engineering; program testing; embedded systems; peripheral interfaces; security of data; operating systems (computers); test equipment.