Investigating The Calibration Results Using The Ecal Service Menu - Agilent Technologies 8753ET User Manual

Calibrating for Increased Measurement Accuracy
Calibrating Using Electronic Calibration (ECal)

Investigating the Calibration Results Using the ECal Service Menu

CAUTION The confidence check described in the previous section displays the ECal data of a single
state. This confidence state is a calibrated standard not used during ECal. It is provided to
give an independent assessment of the quality of a calibration. In the Ecal Service menu, you
may also display each of the calibration standards which are used during an ECal calibration,
along with the analyzer's measurement of those standards.
You may notice a difference in measurement results when comparing ECal confidence state
data and ECal standard state data. This result may be related to certain measurement errors
with the network analyzer system, which add uncertainty to measurement results. More
detailed information regarding measurement uncertainty is documented in the "Determining
System Measurement Uncertainties" chapter of the network analyzer's reference guide.
Additional information on improving your measurements can be found in
"Optimizing Measurement Results."
Using the ECal Service menu is not a standard part of the ECal procedure. It is a tool to allow you to identify
problems in the calibration equipment, cables, connectors, or procedures.
The Confidence Check menu supports the comparison of the measured data versus the module's
premeasured calibration data for the confidence state. The ECal Service menu supports the comparison of
the measured data versus the module's premeasured calibration data for the remainder of the module
states, in addition to the confidence state.
Access the ECal Service menu by pressing
The ECal Service menu softkeys are:
ECal STD [ ]
REFL STD [ ]
NOTE When there is no premeasured calibration data for a given state and measurement
parameter, a warning is displayed indicating that no module date is available.
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ECal SERVICE
Toggles the analyzer to show the data for the following calibration states:
• CONF (Confidence)
• THRU
• ISOL (Isolation)
• S11 REFL (S11 Reflection)
• S22 REFL (S22 Reflection)
Toggles between the available S11 and S22 reflection states listed in the
ECal STD [ ] softkey described above.
• S11 REFL allows up to 13 reflection states.
• S22 REFL allows up to 13 reflection states.
Chapter 5 ,
from the Confidence Check menu.