Mixer Calibration; Scalar-Mixer Calibration - Agilent Technologies E5071C Manual

E5071C

Mixer Calibration

Scalar-Mixer Calibration

Overview
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Confirming Calibration Status
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Procedure Using Mechanical Calibration Kit
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Procedure Using ECal Kit
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Other topics about Mixer Calibration
Overview
The E5071C has a scalar-mixer calibration function for measuring
frequency conversion devices.
Scalar-mixer calibration allows you to measure the magnitude value and
reflection parameter of the mixer's conversion loss with very high accuracy
by performing calibration using calibration standards (OPEN/SHORT/LOAD)
in combination as well as a power meter.
For measurement of the conversion loss in a frequency conversion device,
normal full 2-port calibration is not available because of the frequency
difference between the stimulus port and the response port. Therefore,
scalar-mixer calibration allows you to correct the error term that resides in
a full 2-port error model by using the error model and an expression based
on a new concept.
You can correct the following error elements by using the scalar-mixer
calibration.
The reflection between the output port of the network analyzer and
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the input port of the measured mixer (vector error correction).
The reflection between the output port of the measured mixer and
•
the input port of the network analyzer (vector error correction).
Transmission frequency characteristics at different frequencies
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(scalar error correction).
The frequency-offset error model can be described by the flow graph in the
figure below. From the flow graph it can be seen that the model is divided
in two halves: the stimulus port and the response port. By conceptualizing
the error model in these two halves, each error term can be isolated to
either of the model's halves depending on the frequency at which it was
generated. The majority of the signals will only affect measurements by
causing errors at the same frequency.
Two error signals that are functions of both halves of the frequency-offset
model are isolation (EXF) and transmission tracking (ETF). EXF is set to
zero because it is cannot be detected by the frequency change. ETF must
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