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Method for setting signal source amplitude initial value in electromagnetic radiation sensitiveness automatic test

A technology of electromagnetic radiation and automatic testing, applied in the direction of measuring electricity, measuring devices, measuring electrical variables, etc., can solve the problems of not taking into account, the initial setting method of the signal source amplitude is not flexible enough, and the lack of the initial value setting method of the signal source amplitude. , to achieve the effect of improving test efficiency and accuracy

Inactive Publication Date: 2009-01-21
BEIHANG UNIV
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Problems solved by technology

However, this method does not take into account that the limit value requirements at different frequency points may be different. When the limit value changes greatly, it is meaningless to simply use the final amplitude value of the previous frequency point as a reference.
[0007] It can be seen that in the automatic test of electromagnetic radiation sensitivity, the existing initial setting method of signal source amplitude is not flexible enough, and there is a lack of an initial value setting method of signal source amplitude that takes into account the gain of the power amplifier and the performance of the radiation antenna

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  • Method for setting signal source amplitude initial value in electromagnetic radiation sensitiveness automatic test
  • Method for setting signal source amplitude initial value in electromagnetic radiation sensitiveness automatic test
  • Method for setting signal source amplitude initial value in electromagnetic radiation sensitiveness automatic test

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[0054] In a test, the limit value curve specified in the test standard is as follows: image 3 As shown, it is necessary to apply 200V / m electric field interference to the tested product when 1MHz≤f≤100MHz, and to apply 100V / m electric field interference to the tested product when 100MHz<f≤1GHz. The amplitude of the signal source is adjusted in a fixed increment of 2dB. In order to better examine the electromagnetic sensitivity of the device under test, it needs to stay for 3s after each adjustment. The following are the amplitude adjustment steps adopting the signal source initial value setting method of the present invention:

[0055] The first step: the first test frequency point f 0 =100MHz, the amplitude initial value is from U 00 =-60dBm start to adjust, adjust the signal source amplitude according to some existing amplitude adjustment scheme, when the signal source output amplitude reaches U 0 =-16dBm=91dBuV, the reading of the field strength monitor just reaches the...

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Abstract

The invention discloses a method for setting the amplitude initial value of a signal source in an electromagnetic radiation sensitivity automatic test, which refers to an antenna factor calculation correlation and the related quantities of a first test frequency point to attain the antenna factor of the radiation antenna at the frequency point; refers to an amplitude initial value reference value of the signal source, the antenna factor of the radiation antenna at the first test frequency point, and the electromagnetic radiation field intensity corresponding to a second test frequency point regulated by test standards, the present gain of a power amplifier, the loss caused by the test cables and test loop of the second test frequency point, to calculate the amplitude initial value reference value of the signal source. Referring to the amplitude value, amplitude can be adjusted finely as the present signal source amplitude initial value. According to same amplitude adjustment schemes, the initial value setting method can effectively improve test efficiency.

Description

technical field [0001] The invention belongs to the field of electromagnetic compatibility automatic testing, and relates to a method for setting an initial value of signal source amplitude in automatic testing of electromagnetic radiation sensitivity. Background technique [0002] Electromagnetic radiation susceptibility refers to the strength of the electromagnetic radiation interference field that causes equipment, subsystem or system performance to degrade. [0003] The purpose of the electromagnetic radiation susceptibility test is to examine the ability of the tested product to withstand the external radiated electromagnetic field. The electromagnetic radiation susceptibility automatic test system is generally composed of a signal source, a power amplifier, a radiation antenna, a field sensor, a monitoring device, and a PC (see figure 1 As shown), the output signal of the signal source is transmitted to the input terminal of the power amplifier through the radio frequ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/00
Inventor 戴飞谢树果曹景阳苏东林宋振飞曹成
Owner BEIHANG UNIV
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