The models cover in total the frequency range from 9 kHz to 50 GHz, with connectors Type N, 3.5mm, 2.92mm 2.4mm corresponding to the frequency range. They are available with 2 or 4 ports, however, with re-connection also multiport calibration of R&S® ZNBT and R&S® ZNB+switch matrix systems is supported. The model R&S® ZN-Z51, ranging up to 8,5 GHz, allows to configure each port individually: The standard versions are 3.5mm(f) and type N(f) ports, but via options, each port can be ordered individually as 3.5mm (f or m), N (f or m), 7/16 (f or m), or 4.3-10.
