Chapter 4
151
Calibration
Partial overwrite
4. Cal
ibra
tion
Partial overwrite
The partial overwrite function is used to perform partial measurement after the execution
of calibration, and it overwrites the calibration coefficients.
There are three types of calibration coefficients: Er, Es, Ed for reflection, Et for
transmission, and Ex for isolation. If some of them do not provide satisfactory calibration,
you can use this function to re-calculate the calibration coefficients by measuring an
applicable standard only instead of measuring all standards again.
NOTE
When the calibration coefficients become inappropriate over time or the status on the
E5070B/E5071B side from the calibration surface changes due to replacement of a cable or
connector, you need to also perform thru measurement when partial overwite is required
for reflection or isolation measurement.
NOTE
Partial overwrite is not available if no calibration has been done.You cannot append
calibration coefficients to previous calibrations. For example, you cannot realize full 4-port
calibration by performing additional calibration for 1 port after the execution of full 3-port
calibration. The partial overwrite function is used to make measurements for previous
calibration coefficients and overwrite them.
Procedure
Follow these steps to execute the partial overwrite function. The example demonstrates
re-calibration for full 2-port thru calibration.
Step 1.
Press
or
to select the channel for which you want to execute
re-calibration.
Step 2.
Press
.
Step 3.
Press
Calibrate
.
Step 4.
Press
2-Port Cal
.
Step 5.
Press
Select Ports
.
Step 6.
Select the test ports for which you want to perform re-calibration for full 2-port calibration.
(In the following procedure, the test ports you select are expressed as test ports x and y.)
Softkey
Function
1-2
Selects test ports 1 and 2.
1-3
Selects test ports 1 and 3.
1-4
Selects test ports 1 and 4.
2-3
Selects test ports 2 and 3.
2-4
Selects test ports 2 and 4.
3-4
Selects test ports 3 and 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 ...