Automatic testing device and system of demodulator

Abstract

The invention provides an automatic testing device of a demodulator. The device comprises a signal generator used for generating a standard signal, a noise source connected with the signal generator and used for superposition of the standard signal and noise and outputting a first modulation intermediate frequency signal, the demodulator to be tested connected with the noise source and used for demodulating the input modulation intermediate frequency signal so that demodulated data can be acquired, an error rate tester connected with the demodulator to be tested and used for statistics of the bit error condition of the demodulated data, and a spectrum analyzer connected with the noise source through a first selective switch and used for calibrating the power of the signal and noise in the modulation intermediate frequency signal. According to the device, testing efficiency is high, test data are complete and accuracy is high. The invention further provides an automatic testing system of the demodulator.

Description

technical field [0001] The invention relates to the field of automatic test systems, in particular to a demodulator automatic test device and system. Background technique [0002] ATS (Automatic Test System) for precision instruments has become more and more powerful with the development of instrumentation technology. A relatively complete ATS standard has been formed in foreign research institutions, and it is based on instrument bus standards such as VXI and GPIB. There are many practical and effective automatic test systems. At present, domestic general-purpose and special-purpose equipment for a certain field are also increasingly developing in the direction of high-integration integration. It is increasingly becoming the focus of future development in the field of automatic testing to greatly save manpower and time consumption for instrument testing through automated testing. [0003] High-speed remote sensing data receiving and processing equipment is the key equipmen...

AI Technical Summary

Problems solved by technology

[0003] High-speed remote sensing data receiving and processing equipment is the key equipment in the satellite ground station system. It mainly completes important functions such as high-speed baseband data acquisition, frame synchronization, and channel coding and decoding. Most of the existing ground receiving equipment, that is, the demodulator, uses manual measurement. A demodulator with comprehensive functions and a complete structure has a large amount of test data and complex and diverse functions. A single tester needs to work continuously for about a week to complete the test. In addition, the introduction of human measurement errors makes the reliability of the test results worse. It consumes more manpower and material resources, and adds a lot of unnecessary repeated tests. At present, the domestic demodulator tests are all performed manually, and the automatic test system has not been used yet.

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