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Yang Z.,Science and Technology on Electronic Test and Measurement Laboratory
Yi Qi Yi Biao Xue Bao/Chinese Journal of Scientific Instrument | Year: 2014

Using the successful experience of Software Radio for reference, taking the generation and reception of the signal as research object, the general auto test platform is divided into several LXI test modules, which are mutually independent. The LXI digitizer module and the LXI Down-Converter module are selected as the platform of spectrum synthetic. In the design of its spectrum software design, the LabWindows/CVI is taken as the development tool, and the multi-thread technique is applied to ensure the running speed and response speed of the system. Finally, the synthetic of spectrum analysis is achieved, which lay the foundation of the practicality of the Synthetic Instrument. Source


Liu J.,Science and Technology on Electronic Test and Measurement Laboratory
Proceedings of 2013 IEEE 11th International Conference on Electronic Measurement and Instruments, ICEMI 2013 | Year: 2013

An adjustable pulse module with FPGA-based 0.1 ns resolution is designed, which has the function of simultaneously generating multi-channel pulse. Various pulses time delay can be adjusted each other. Therefore it can improve the small target RCS (radar cross section) test accuracy under the complex environment. At present, the technology is successfully applied to a RCS tester. © 2013 IEEE. Source


Cao Z.,Science and Technology on Electronic Test and Measurement Laboratory
Proceedings of 2013 IEEE 11th International Conference on Electronic Measurement and Instruments, ICEMI 2013 | Year: 2013

Firstly, this paper introduces amplitude-phase characteristic test requirement and application of multi-channel phase coherent signal, and then puts emphasis on realizing accurate test for amplitude-phase coherence of multi-channel phase coherent signal with frequency tracking and vector error correction technology. Finally, the feasibility of this method is proved by experiment data of multi-channel receivers. © 2013 IEEE. Source


Cao Z.,Science and Technology on Electronic Test and Measurement Laboratory
2015 IEEE 12th International Conference on Electronic Measurement and Instruments, ICEMI 2015 | Year: 2016

Beginning with the test demand of frequency converter with embedded local oscillator in satellite, this paper, combining the technical feature of multifunctional vector network analyzer, puts forward a precise test method, which is based on frequency tracking and vector mixer calibration technique regarding the test requirement of group delay and conversion loss of frequency converter with embedded local oscillator. Through the result, we can see that the test method is accurate, feasible and can provide effective technical measures for the performance testing and evaluation of the frequency converter with embedded local oscillator in satellite. © 2015 IEEE. Source


Li M.,Science and Technology on Electronic Test and Measurement Laboratory
2015 IEEE 12th International Conference on Electronic Measurement and Instruments, ICEMI 2015 | Year: 2016

In order to carry out more complex parameters measurement, the expression editor function is need to vector network analyzer. This paper explores a new method to carry out expression editor function of vector network analyzer. The expression editor allows user to input a complex algebraic expression of standard mathematical operators, complex numbers, custom parameters and functions, referencing data that is available in the vector network analyzer. If an improper algebraic expression is input, the expression editor will check errors and pop-up notations for user to amend the expression. If input expression is calculable, the display of the active trace of vector network analyzer is replaced with the results of the expression and updated in real-time. © 2015 IEEE. Source

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