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Concepts and features
R&S
®
ZND
164
User Manual 1173.9557.02 ─ 61
4.5.5
Automatic calibration
A calibration unit is an integrated solution for automatic system error correction of vec-
tor network analyzers. Rohde & Schwarz offers a wide range of calibration units for dif-
ferent frequency ranges and connector types. The connector types of the calibration
unit should be selected according to the connector types of the DUT.
The calibration units contain calibration standards that are electronically switched when
a calibration is performed. The calibration kit data for the internal standards is also
stored in the calibration unit, so that the analyzer can calculate the error terms and
apply the calibration without any further input.
Advantages of automatic calibration
Automatic calibration is faster and more secure than manual calibration, because:
●
There is no need to connect several standards manually. The number of connec-
tions to be performed quickly increases with the number of ports.
●
Invalid calibrations due to operator errors (e.g. wrong standards or improper con-
nections) are almost excluded.
●
No need to handle calibration kit data.
●
The internal standards do not wear out because they are switched electronically.
Limitations of automatic calibration
Calibration units do not contain characterized Through standards, so calibration types
TOM, TSM, TRM, TRL, TNA are not available.
Calibration
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