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Challenge |
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A company manufactures a data transmission cable in which the transmission lines are magnetically coupled but electrically isolated from the connectors. Multiple one-to-one transformers in each connector have been tested at incoming inspection for compliance to the radio frequency characteristics specified but it was considered impracticable to use the same methods for a final assembly test. The final test needed to verify coil polarity as well as detect short and open circuits. |
 
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Solution |
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Using the Signature Touch1 equipped with the scripting option, a custom component was designed to pulse each transformer. This pulse was coupled through the transmission line where it appeared at the output. The output pulse routed through a filter network built into the test adapter. The script measured the voltage across the filter. A "correctly assembled" product produced over 150 mV of signal in the output. A negative voltage revealed an improperly wired transmitter or receiver coil. Voltage too high or low revealed an open or short circuit condition. |
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Results |
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This test dramatically reduced the number of field failures by making the final assembly test quicker and more robust. As the defects went down, throughput went up! |
© Cirris Systems Corp.