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ZVT GUI Reference
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Operating Manual 1145.1084.12 – 30 550
Always use the DC power supply shipped along with or recommended for your
converter.
Power and Frequency Settings
While the frequency converter mode is active, the Channel – Stimulus settings of the network analyzer
control the frequency and power range of the converters. In addition the Port Configuration dialog shows
an additional row for each Converter Port <n>. The Frequency and Power columns in the Source section
of the dialog serve different purposes:
The Power column gives access to the Converter Port <n> Power dialog.
The source frequency at the converter test ports is determined by the frequency at the RF In
input. This frequency is set in the port configuration table for the associated NWA port. The
formula in the converter row of the Port Configuration table defines the frequency that is
transferred to a power meter for correction during source power calibrations and to the waveguide
standards during system error correction. It actually does not affect the converter output
frequencies. Ensure that the correct converter frequencies are set, especially if the test setup
contains additional frequency-converting components.
Example: In the example below, the frequency at the NWA Port 1 has been increased by a 50 MHz offset.
The converter source frequency is six times the NWA source frequency, therefore a 300 MHz offset has
been entered for Converter Port 1.
SOURce<Ch>:FREQuency<Pt>:CONVersion:ARBitrary:CFRequency
SOURce<Ch>:POWer<Pt>:CONVerter:OFFSet
Power Calibration for Converters without Electronic Attenuators
If Control Method in the Port <i> Power Control dialog is set to None or Mechanical Attenuator, the output
power of the frequency converter can only be manually set (by the power adjustment knob). Therefore no
source power calibration can be performed that eliminates frequency response errors in the signal path
between source and reference plane (external power meter). A power calibration of the reference receiver
(a-wave) using an external power meter, however, is possible. It is recommended for measurements
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