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ZVB / R&S
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ZVT GUI Reference
Channel Menu
Operating Manual 1145.1084.12 – 30 357
[SENSe<Ch>:]FREQuency:CW|FIXed
[SENSe<Ch>:]FREQuency:IMODulation:TDIStance
[SENSe<Ch>:]FREQuency:IMODulation:SPECtrum:MORDer
[SENSe<Ch>:]FREQuency:IMODulation:SPECtrum[:STATe]
Intermodulation Distortion Measurement Power Calibration
The Intermodulation Distortion Measurement Power Calibration wizard controls the power calibration for
the intermodulation measurement. A power calibration ensures accurate levels at the input of the DUT
(source power calibration for the lower and upper tone) and an accurate power measurement of the
intermodulation distortion quantities (receiver calibration). The necessary calibration steps are
automatically performed across the entire frequency or power range of the intermodulation measurement.
Power calibration procedure and example
Due to the different frequency ranges to be calibrated, the intermodulation distortion measurement power
calibration is performed in several steps. For a scenario where the directional coupler of port 3 is used to
combine the lower tone from port 1 and the upper tone from port 3, and where the output of the DUT is
connected to port 2, the following test setups are required.
1. Source power calibration at the lower tone port. A power sensor is connected to port 1. Ports 1 and 3
are connected as shown below (SOURCE OUT (1) to MEAS OUT (3) and Port 3 to SOURCE IN (1)). The
RF power (red) is calibrated over the selected sweep range.
In this calibration step the following frequency ranges will be calibrated with port 1 driving:
a. The lower tone frequency range (the base frequency range)
b. The frequency range for all lower and upper intermodulation products which have been selected
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