System Overview
R&S
®
ZVT
85
Getting Started 1300.0045.62 ─ 10
Automatic calibration is less flexible than manual calibration:
●
Some calibration types (TOM, TRM, TRL, TNA) are not available.
●
Automatic calibration cannot be performed for segmented frequency sweeps.
Please observe the safety instructions in the "Technical Information" provided with the
calibration unit to avoid any damage to the unit and the network analyzer. Safety-rela-
ted aspects of the connection and operation of the units are also reported in the sec-
tions below.
3.4.4 Power Calibration
The purpose of a power calibration is to ensure accurate source power levels and
power readings at a particular position (reference plane) in the test setup. Power cali-
bration is essentially different from the system error correction described in the previ-
ous sections. For best accuracy, a power calibration should be performed in addition to
a system error correction.
In general, a power calibration involves two stages:
1.
Source power calibration:
An external power meter is connected to the reference
plane. The analyzer modifies its source power until the power meter reading corre-
sponds to the desired source power value.
2.
Receiver power calibration:
The analyzer uses the calibrated source signal to
adjust the power reading at the receiver port.
The analyzer provides power calibration wizards for various measurement modes.
3.4.5 Offset Parameters
Offset parameters complement the system error correction and power calibration, com-
pensating for the known length and loss of a (non-dispersive and perfectly matched)
transmission line between the calibrated reference plane and the DUT. The analyzer
can also auto-determine length and loss parameters, assuming that the actual values
should minimize the group delay and loss across the sweep range.
3.5 Optional R&S ZVT Extensions
The network analyzer can be upgraded with a number of hardware and software
options, providing enhanced flexibility and an extended measurement functionality. The
available options are listed in the "Info – Option Info" dialog. The R&S ZVT options lis-
ted below are described in detail in the reference chapters of the help system. For a
Optional R&S ZVT Extensions
