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Performing a TRL Z-Port
Measurement Calibration
This example describes use of the HP 3.5 mm precision
calibration kit to measure an insertable device. When the
test device is insertable, the test ports can be connected
together to establish the Thru connection during
calibration.
The procedure used for performing any measurement
calibration is as follows:
1. Clean and inspect all connectors.
2. Initiate measurement calibration procedure and
measure standards.
3. Verify the calibration.
4. Connect the device under test.
The rest of this section explains the above steps.
Electrostatic Discharge
en ou make connections to the network analyzer,
either directly to the test set port or indirectly through a
cable that is connected to the test set port, protect the
instrument against electrostatic discharge (ESD). Always
wear a grounding wrist strap connected to a conductive
bench mat when working near sensitive equipment.
The human body almost always has some static charge.
You are not usually aware of this charge because the
human threshold for the perception of a static discharge
shock is about 30
ESD as low as 60 volts can damage
sensitive microcircuits.
Clean and Inspect
The accuracy of error-corrected measurements using the
network analyzer depends upon the quality of the
measurement calibration. In turn, the quality of the
calibration depends on the condition and cleanliness of the
test ports and calibration standards, and the operator’s skill
in making connections. Repeatability and accuracy are
improved by removing contaminants from mating surfaces
during cleaning.
Carefully inspect the following for cleanliness and
damage. Look for deformation of the male pin or the
female receptacle, and for metallic and organic residue on
the mating surfaces.
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Test set test ports
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Test port cables
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Precision adapters
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Calibration standards
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DUT Connectors
