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Chapter 4
Calibration
Simplified calibration
Simplified calibration
The simplified calibration calculates the calibration coefficients by skipping part of thru
measurement (and line measurement for TRL measurement) that is necessary for the full
3/4-port calibration and the 3/4-port TRL calibration.
Simplified full 3/4-port calibration
In the simplified full 3/4-port calibration, since the calibration coefficients are calculated
while omitting part of the thru measurement data, the effect of errors when acquiring
calibration data becomes larger than in the normal full 3/4-port calibration. Therefore, you
must pay special attention to the following points when measuring data for the simplified
full 3/4-port calibration.
o The standard used for measurement must match its definition value.
•
Use a standard that provides good repeatability (stability).
•
Do not omit the length of the thru when defining the standard.
•
When using a user-created standard, verify the definition value.
•
For the N connector, note the discrimination between male and female.
o Realize high reliability and repeatability for measurement.
•
Reduce the difference in external environment (such as temperature difference)
between conditions of measuring calibration data and conditions of measuring
actual data.
•
Set the power level of the stimulus signal to a value that does not generate
compression.
•
Narrow the IF bandwidth.
•
Increase the averaging factor.
•
Use a cable whose change in amplitude/phase characteristics when bent is small.
•
Use high-precision connectors.
The types of thru measurement you can omit are determined by the ports you select. Some
types of thru measurement cannot be omitted. The table below shows the types of thru
measurement that can be omitted.
Table 4-2
Types of thru measurement that can be omitted for simplified full 3-port
calibration
Ports used
Types of thru measurement that can be
omitted
Ports 1, 2, 3
2-3
Ports 1, 2, 4
2-4
Ports 1, 3, 4
1-4
Ports 2, 3, 4
2-4
Summary of Contents for E5070B
Page 6: ......
Page 30: ...24 Contents ...
Page 34: ...28 Chapter1 Precautions Before contacting us ...
Page 286: ...280 Chapter6 Data Analysis Using the Equation Editor ...
Page 430: ...424 Chapter12 Optimizing Measurements Performing a Segment by Segment Sweep segment sweep ...
Page 538: ...532 Chapter15 Measurement Examples Executing Power Calibration ...
Page 634: ...628 AppendixB Troubleshooting Warning Message ...
Page 732: ...726 AppendixD Softkey Functions Trigger Menu ...
Page 740: ...734 AppendixE General Principles of Operation Data Processing ...
Page 760: ...754 AppendixF Replacing the 8753ES with the E5070B E5071B Comparing Functions ...