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The attachment shows a TDR result from a set of measurements of high speed QSFP test fixtures. From the measured differential impedance, what information can I get about the QSFP test cards? Any suggestions?
Hello,
The graphs will give you the information about the impedance corresponding to the time. E.g. The time is related to the length of the cable, So you will get the information of impedance corresponding to each point of the cable. This is general case about TDR measurements, I am not familiar with QSFP test cards.
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