Freq-Return Loss, Freq-Vswr, Cable-Loss Measurement - Promax AC-726 User Manual

Users can directly calibrate at the RF port, also can calibrate with a high
performance cable connected to RF port. If the former, usually, the calibration
curve of 50 ohm load will be significantly lower than the other two.
If calibration is completed, the user can start measurement.
The user can also select the file menu to save the calibration data in the local or
external disk.
After the system boot, the default calibration data will be recent one.
The user clicks on the "file" menu, click "import", can recall previous calibration
data. If the environment is similar, the previous calibration data can be used
directly.
NOTE:
Need to re calibration if frequency changed or measurement points increased
Need to re calibration if temperature changes a lot
Do not need re calibration if measuring points reduced.
Do not need re calibration if distance, cable parameters, window function
changed.
4.4

Freq-Return Loss, Freq-VSWR, Cable-Loss measurement

The measurement can be used to verify the power matching of the port or the
loss of the cable .X axis coordinate is frequency, Y axis coordinate are VSWR, or
the return loss, or loss of cable separately.
In the following ways users can enter the measurement interface.
In the main interface, click on the "measurement" icon, and then click the
corresponding icon.
In the measurement interface, the user can do a variety of measuring operation.
NOTE:
Need to set proper frequency parameters before test
Need to confirm that the system is in "calibration valid" state before test
The minimum frequency interval is 1MHz
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