A two-port device can be connected to test ports 1 and 2 of Vector Network Analyzer ZVR for measurement of its S-parameters. If the device has more than two ports however (eg an antenna diplexer with three ports or directional coupler with four ports), it is necessary to change the cabling by hand to be able to measure all the scattering parameters. With the 3-Port Adapter and new 4-Port Adapters available as accessories (ZVR-B8 and -B14) this time-consuming procedure can be avoided. Switchover between the different ports is then made with the aid of fast electronic switches.
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