4-Port Measurements with Vector Network Analyzer R&S®ZVR

Three hardware modifications of the option External Measurements ZVR-B25 enable the bidirectional network analyzers of the ZVR-family to carry out 4-port measurements. For the measurements, the four ports PORT 1, PORT 2, INPUT b1 and INPUT b2 at the front panel of the ZVR(E) are utilized. The fifth connector, ie OUTPUT a1, is not required for this purpose. As detailed below, the necessary modifications of the test set of the analyzer are described for the model ZVR. Of course, the modifications can be done in a similar way for the model ZVRE as well.
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