Method and device for detecting power loss in test system
A technology for testing system and power loss, applied in measurement devices, measuring electrical variables, instruments, etc., can solve the problems of RF signal power loss and parameter deviation, and achieve the effect of reducing the effect of errors
Inactive Publication Date: 2019-01-15
BEIJING XIAOMI MOBILE SOFTWARE CO LTD
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Problems solved by technology
Because the tester and the terminal are connected by cables in the test system, and these cables will cause power loss to the power of the radio frequency signal, resulting in deviations between the parameters detected by the test system and the actual parameters of the terminal. Therefore, it is necessary to obtain These power losses, in turn, are compensated for
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[0055] Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, the same numerals in different drawings refer to the same or similar elements unless otherwise indicated. The implementations described in the following exemplary examples do not represent all implementations consistent with the present disclosure. Rather, they are merely examples of apparatuses and methods consistent with aspects of the present disclosure as recited in the appended claims.
[0056]At present, the power loss caused by the cable used in the terminal test, that is, the line loss, is usually compensated for a fixed value, such as 300M-5G frequency band, add -0.6dB at low frequencies, and -0.9dB at high frequencies. But in the actual situation, the line loss of the cable is related to the frequency, the line loss of each frequency point is different, and the li...
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The invention discloses a method and a device for detecting the power loss in a test system. The method comprises the following steps of: detecting the line loss of an auxiliary cable at each frequency point through a vector network when the signal of each frequency point is transmitted from one port of the vector network to the other port through the auxiliary cable; detecting the total line lossat each frequency point of the cable in the auxiliary cable and the test system through the vector network when the signal of each frequency point is transmitted from one port of the vector network to another through the auxiliary cable and the test system; at the frequency point, subtracting the line loss of the auxiliary cable from the total line loss to obtain the line loss of the cable at each frequency point in the test system. According to the method and the device for detecting the power loss in the test system, the line loss of the cable at each frequency point in the test system canbe accurately obtained, thereby accurately compensating the line loss. The influence of an error caused by the cable can be reduced when the test system tests the terminal problem.
Description
technical field [0001] The present disclosure relates to the technical field of terminal testing, and in particular to a method and device for detecting power loss in a testing system. Background technique [0002] With the development of communication technology, users have higher and higher requirements on terminals. Therefore, in order to ensure that the terminal can communicate normally and has excellent performance after leaving the factory, each terminal needs to undergo rigorous testing before leaving the factory. During terminal testing, testers need to connect the terminal to be tested with the test system, and then use the test system to detect various parameters of the terminal to be tested. Because the tester and the terminal are connected by cables in the test system, and these cables will cause power loss to the power of the radio frequency signal, resulting in deviations between the parameters detected by the test system and the actual parameters of the termi...
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IPC IPC(8): G01R35/00
CPCG01R35/00
Inventor 吕小磊李英俊杜佳男
Owner BEIJING XIAOMI MOBILE SOFTWARE CO LTD