Concepts and features
R&S
®
ZNB/ZNBT
190User Manual 1173.9163.02 ─ 62
port calibrated channel, only the two connected instrument ports are validated against
the cal unit.
The validation logic proceeds through the connected ports p ∈ {1, ..., 4} in ascending
order, measuring S
pp
for the Open, Short and Match standard. It then compares the
measured S
pp
values with the corresponding reflection S parameters of the cal unit's
factory characterization. The on-screen feedback indicates success ("PASS", failure
("FAIL") or provides a warning about undetected ports.
Calibration