Signal integrity testing system and method
A signal integrity and testing system technology, applied in the direction of measuring devices, measuring electrical variables, measuring resistance/reactance/impedance, etc., can solve the problems of low work efficiency, difficult data management, high labor intensity of manual testing, etc., to simplify testing process, the effect of improving test efficiency
Inactive Publication Date: 2011-12-28
HONG FU JIN PRECISION IND (SHENZHEN) CO LTD +1
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Problems solved by technology
At present, the integrity test of the transmission signal on the PCB is to test the impedance of each transmission line on the PCB by the tester. Due to the large number of lines on the PCB, manual testing is labor-intensive, low in work efficiency, and prone to human errors. data is not easy to manage
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[0013] Such as figure 1 Shown is a hardware architecture diagram of a preferred embodiment of the signal integrity testing system 10 of the present invention. The signal integrity testing system 10 runs in the control computer 1 . The control computer 1 is connected with an oscilloscope 3 and a time domain reflectometer 4 through a switch 2 . The control computer 1 is also connected with the mechanical arm 5 . A probe grabbing device 6 is installed on the mechanical arm 5 .
[0014] The signal integrity testing system 10 controls the mechanical arm 5 to use the probe grasping device 6 to grasp the probes of the oscilloscope 3 or the time domain reflectometer 4, and locate the probes on the printed circuit board (Printed Circuit Board, PCB) 7. The location to be tested. The oscilloscope 3 tests the signal transmitted by the position to be tested, and transmits the test result back to the control computer 1 through the switch 2 . The time domain reflectometer 4 tests the im...
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The invention provides a signal integrity testing system, which includes a series of functional modules. Using these functional modules, the system analyzes the test file, obtains the circuit to be tested on the electronic component and the coordinates of the test points on each circuit to be tested, and controls the mechanical arm to move the probe of the oscilloscope or time domain reflectometer according to the coordinates of the test point. Locate to the corresponding position on the electronic component. The system also receives the parameter values of the test parameters of the signal to be tested at each test point obtained by the oscilloscope test, and compares each parameter value with a preset reference value range. When a parameter value exceeds the set reference value range, the system receives the impedance value of the test point obtained by the time domain reflectometer test, and judges whether the impedance value of the test point falls within the standard range of the impedance value of the line to be tested. To judge whether the test point passes the test. The invention also provides a signal integrity testing method. By using the invention, the testing process can be simplified and the testing efficiency can be improved.
Description
technical field [0001] The present invention relates to a test system and method, in particular to a signal integrity test system and method. Background technique [0002] With the improvement of the working speed of the digital circuit, the transmission rate of the signal on the printed circuit board (Printed Circuit Board, PCB) is also getting higher and higher. For PCBs, the impedance of transmission lines is a key factor affecting signal integrity. Correspondingly, for PCB testing, it is also necessary to test the change of impedance on the signal transmission line. At present, the integrity test of the transmission signal on the PCB is to test the impedance of each transmission line on the PCB by the tester. Due to the large number of lines on the PCB, manual testing is labor-intensive, low in work efficiency, and prone to human errors. The data is also not easy to manage. Contents of the invention [0003] In view of the above, it is necessary to propose a signal ...
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IPC IPC(8): G01R27/02
Inventor 梁献全李昇军许寿国
Owner HONG FU JIN PRECISION IND (SHENZHEN) CO LTD