Consider the Source: Reliable Network Analysis Starts with a Clean Signal
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For traditional measurements like S-parameters and gain, network analyzers can easily perform highly accurate measurements. It does so by sampling the test signal before and after it reaches the device under test (DUT) and using vector error correction to account for errors from cables and connectors. Because the input and output frequencies are the same, small discontinuities from the signal source are ratioed out and do not significantly affect the measurement.