R&S ZVB - Page 336

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ZVA / R&S
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ZVT GUI Reference
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Operating Manual 1145.1084.12 – 30 321
Mixer Power Cal procedure: source match or source and load match correction
The mixer power calibration for measurements with source match correction and with source and load
match correction is similar to the power calibration for the scalar correction type described above,
however, the following differences apply:
 A source power calibration of the IF port (in the IF frequency range) is recommended. The IF
source power calibration avoids possible inaccuracies of an IF receiver calibration (due to cable
loss, connectors and mismatch). This calibration step requires an additional connection of the
power meter to the IF port. Together with the enhanced wave correction, it also calibrates the IF
receiver.
 If the IF source port calibration is performed, then no additional IF receiver calibration is
necessary. Furthermore, the RF source power calibration in the IF range is not needed.
 If an additional IF receiver calibration is performed, it is possible to switch back to scalar
correction or toggle between the correction types.