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Testing the new USB4 Type-C standard cable assemblies requires a series of integrated test parameters corresponding to the incidental and reflective behaviors over a frequency range. The increased bit rates of 80 Gbps to support USB4 protocol bring additional signal integrity challenges, making the test requirements on cables and connectors more stringent. The channel operating margin (COM) and high-speed integrated S-parameter tests include up to 44 sets of S-parameter measurements and execution of USB-IF compliance test tools to verify the results.
Testing USB-C cables using a 4-port vector network analyzer (VNA) can be very manual—calibration, measurement setup, and test execution are time-consuming and prone to user errors. Using modular multiport network analyzers such as PXIe VNA and a switch matrices system capable of handling multiport measurements with compliance test software ensures it meets compliance test requirements and is robust.
Additional resources for USB-C cable and connector compliance testing
Impedance mismatch characterization in high-speed digital application design and test requires understanding the reflection signals in both the time and frequency domain. Learn how to measure hot S-parameter and hot TDR measurement, including eye diagram, using a network analyzer.
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Characterizing the forward error correction (FEC) performance of hyperscale data centers requires visibility into all ethernet lanes to detect and correlate meaningful errors. Learn how to set up an FEC test to quantify the bit error rate (BER) and FEC performance of different devices in bursty Ethernet traffic.
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Testing the USB Type-C power delivery module requires monitoring the CC lines with a 300 kHz signal and measuring the generated voltage and currents. Learn how you can analyze the resulting eye diagram with an oscilloscope to ensure the dynamically variable power provided by USB Type-C power delivery achieve compliance.
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