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4.2.3
Set Window Function
In the distance to the fault analysis, if the location of the two connectors are
close, because of the influence of spectral leakage, two connectors will be
influenced each other. If return loss of one connector is much smaller than
another one, most probably it will be lost and can't be recognized. In this case
users should choose to use the window function.
System support four types window function: rectangle window, Hamming
window, Keyser window, Blackman window.
4.3
OSL Calibratrion
The user needs to confirm the system is in "calibration valid" state before a test.
Before one test, system need to know beforehand the 3 known load (open
/short/50Ohm) test results. The user can import the previous calibration data; or
do OSL calibration before test.
The user can enter the calibration interface by the following ways.
In the main interface, click on "calibration" mode icon.
►
In the measurement of interface, click on the button "cal mode".
►
The OSL calibration procedure is as follows.
Set the frequency parameter.
►
Set up calibration parameters (optional).
►
Calibrate the first load.
►
Connect the load to the RF ports, click on the corresponding button.
The system will pop up a small window, click on the "OK".
System start calibration.
Once calibration is completed the screen will display the curve.
Calibrate other loads.
►
If all calibration of three loads completed, the green "cal on" will shown at
►
the lower left corner of the screen.
39
Figure40.
April 2016
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