Method for searching channel number of tester on-line
A channel number and tester technology, applied in electronic circuit testing, instruments, measuring electricity, etc., can solve the problems of increasing the total number of channels, low search efficiency, long channel time, etc. Efficiency, longevity effect
Inactive Publication Date: 2011-01-05
ZTE CORP
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Problems solved by technology
1. The average time to search for channels is long, especially when there are many channel boards, the total number of channels increases, and multiple comparison voltage measurements are required, and the search efficiency is low
2. Due to the large number of F relays, the relays of the channel board need to be closed and opened frequently, which increases the loss of the online tester and greatly reduces the service life of the online tester
Method used
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The invention discloses a channel number search method of online tester, belonging to the online test technical field of printed circuit board, which mainly comprises arranging multiple channel board in an online tester, turning on the relays on all channel boards, turning off some relays, searching the target channel board of the grounding channel, and recording the serial number of the target channel board, searching the target relay on the target channel board relative to the grounding channel, and recording the serial number of the target relay, calculating out the channel number of the grounding channel. The invention can reduce the comparison times between public terminal voltage and zero threshold value in the search of channel number, to improve search speed, prolong the service life of online tester and improve search efficiency.
Description
A channel number search method for an online tester technical field The invention relates to the field of on-line testing of printed circuit boards, in particular to a technology for quickly searching channel numbers on an on-line tester. Background technique In-Circuit Test (ICT) is a standard test method to check whether there are defects in the printed circuit board and whether the components are good by testing the electrical properties and electrical connections of the online components. Open and short circuit conditions of components and various circuit networks. An online tester is a device that provides online testing. The online tester implants a probe in each circuit network of the single board to be tested, and each probe is connected to a channel of the online tester. The online tester controls the voltage on the probe through the channel to achieve the purpose of controlling the network voltage of the single board under test, and each channel will have a ch...
Claims
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IPC IPC(8): G01R31/28G01R31/02
Inventor 廖继红
Owner ZTE CORP