China Electronics Technology Instruments AV3672 Series, User Manual

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7 Calibration
7.10 Electronic Calibration
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button.
d) [Port Matching] drop-down menu
The port selection part includes the vector network port and fixture port. The [Fixture port] drop-down menu is not
displayed in the default mode. The selected mode and network embedding/de-embedding type will be displayed in
the schematic diagram. Select the corresponding port relationship to determine the number of the embedding/de-
embedding port and the corresponding relationship to the port for file import.
e) [Enable on/OFF] check box
Select this check box to enable the fixture embedding/de-embedding function.
f) [OK] button
Click it to make the settings in the dialog box effective for the current active channel.
2) Steps of 4-port embedding/de-embedding
Menu path: [Cal] > [Fixtures] . Click [4-port Embed/De-embed...] in the [Fixtures] sub-menu. The [4-port
Embed/De-embed] dialog box will appear.
Tick the [Enable on/OFF] button in the dialog box to enable the four-port fixture embedding/de-embedding
function.
Click the [Mode selection] drop-down menu and select the embedding/de-embedding network model. The vector
network analyzer is configured with three network models ( Mode A, B and C ).
Select the embedding/de-embedding type of Network 1 in the drop-down menu of Network 1 ( Network 2 is
enabled in Mode C ).
If embedding or de-embedding is selected, the [Load File] button will be available. Click the [Load File] button
and select the S4P file to be used in the pop-up dialog box. The file name will be displayed in the lateral square box.
Click [OK] to complete the setting.
7.10 Electronic Calibration
Electronic calibration is a process to obtain system errors by means of standard measurements of the electronic
calibration kit through the network analyzer and calculation according to the fixed value of the electronic
calibration kit. The accuracy of electronic calibration is close to that of mechanical calibration. At the same time,
artificial errors arising from connection of the standard calibration kit in calibration of the vector network analyzer
can be reduced, thus improving the calibration accuracy, calibration velocity and calibration result consistency and
reducing the losses of the test port and expensive test cable.
Each electronic calibration kit is configured with a unique S-parameter saved in the internal memory. In the
calibration process, the vector network analyzer can recall the standard S-parameter of the electronic calibration kit
to obtain the vector error coefficient by means of complex measurement and calculation.
Compared with mechanical calibration, electronic calibration has obvious advantages:
1) High velocity and automatic operation. All the calibration can be completed by one connection, thus reducing
the times of calibration kit connection, menu button selection operations, operation time, connector wear and costs
for maintenance of the test port connector of the test instrument and the calibration kit connector.
2) Low risk and high measurement accuracy. The requirements for operators are low, and the possibility of errors
caused by operators is reduced, which is conducive to the promotion of the network analyzer in the military,
research and production applications.
3) New technology and high quality. New calibration and error correction technologies are applied to make the
accuracy higher than that of mechanical calibration.