Chapter 2 Functions of the Front Panel
RIGOL
VNA User Guide
2-23
Measurement Settings
Meas
VNA provides measurement for S11, S12, and DTF. Press
Meas
to enter the
measurement setting menu. You can also tap the function keypad at the top of the
screen to select Meas.
Under the
Meas
menu, three measurement items are available: S11, S21, and DTF.
DTF (Distance to Fault) is a tool for antenna transmission line service maintenance,
line performance verification, and failure analysis.
In cable and antenna test, it provides functionality to measure cables for mechanical
defects in the system that cause a deterioration of the transmission quality. It is
based on network analysis time domain measurement, capable of locating the cable
problem, responsive to resistance, inductance, and capacitance failures, helpful for
engineers to locate the cable problem.
S11 Meas Setup
Open S11 parameter setting menu of the function selected in the
Meas
menu.
The main test process for S11 is as follows:
1.
Set full span parameters.
2.
Set IF BW.
3.
Calibrate.
4.
Use the self-defined standard kit to validate Smith and trace display.
5.
Modify the frequency range and IF BW as required, and perform Step 3 and 4 for
several times.
Set average count, aperture step width, and other parameters.
Avg Number
Specifies the number of counts (N) for Average, Max Hold, and Min Hold.
It is valid when Trace Type is "Average". The greater the value of N, the smoother the
trace is displayed.
In Average, Max Hold, and Min Hold modes, when performing the single
measurement, the instrument stops sweeping after the sweep count has reached N.
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