R&S ZVH
Cable and Antenna Test Mode
Performing Cable and Antenna Measurements
Operating Manual 1309.6946.12 - 09
44
2.1.6 Calibrating Measurements
To get the best and most accurate results, you have to calibrate the measurement. The
R&S ZVH provides several calibration methods. You will need one of the available
calibration standards R&S FSH-Z28, -Z29 (order no. 1300.7804.03 and 1300.7504.03)
or R&S ZV-Z121 (order no. 1164.0496.02/.03).
Alternatively, when you work with the network analyzer, you can create customized
calibration kits with the functionality of the R&S ZVHView software package and use
them on the R&S ZVH.
To successfully calibrate the test setup, you have to connect the calibration standard at
the reference plane, usually the output of the RF measurement cable.
Calibration is performed over the R&S ZVH's entire frequency range (full span). This
eliminates the need for recalibration when you change a parameter or select a different
cable or DUT.
Calibration also remains valid after turning off the R&S ZVH or changing into another
operating mode as calibration data is saved in the internal memory of the R&S ZVH. If
you save the measurement in a dataset, calibration data is part of that dataset. When
you restore the dataset and perform the same measurement again, you do not have to
recalibrate the R&S ZVH.
2.1.6.1 Calibration States
The R&S ZVH features several calibration states that it displays in the status line. The
possible states depend on the calibration type (see below).
● (fcal)
The R&S ZVH uses factory calibration. Factory calibration is restored after a preset
or self alignment.
The calibration data for the factory calibration is already in the memory of the
R&S ZVH when it is delivered. The factory calibration is a full two-port calibration.
You can restore the factory calibration manually any time.
-
Press the CAL key.
-
Press the "Cal Settings" softkey.
-
Select the "User Calibration Off" menu item.
Note that the R&S ZVH discards user calibration over the complete frequency
range after a preset has been done in CAT mode. However, you can also define
that the R&S ZVH keeps user calibration after a preset.
-
Press the SETUP key.
-
Press the "User Preference" softkey.
-
Select the "Discard User Calibration" menu item.
-
Turn it "Off" to keep user calibration after a preset.
