User manual

Chapter 2 Functions of the Front Panel of GPSA RIGOL
RSA3000 User's Guide 2-65
2. Cal Open
After you disconnect the instrument, press this key, and then the instrument
executes the first measurement. The measurement result is represented by
Trace6.
3. VSWR
After you connect the instrument, press this key, and then the instrument
executes the second measurement. The measurement result is represented by
Trace1. At the same time, the analyzer calculates the difference (represented by
the math trace) between the two measurement results. Then the return loss,
reflection coefficient, and VSWR are calculated based on the difference.
4. Selected Marker
Select one of the eight markers. By default, Marker1 is selected. When a marker
is selected, you can set its state. The selected marker is marked on the math
trace. The measurement result at the current marker is displayed in the
measurement wizard.
5. Marker Mode
Sets the type of the currently selected marker.
6. Marker Freq
Sets the frequency of the selected marker.
7. Ref Value
Sets the reference level to adjust the vertical position of the trace on the screen.
 Different from Ref Level under the AMPT menu, modifying this parameter
does not affect the reference level of the analyzer.
 You can use the numeric keys, the knob, or arrow keys to modify this
parameter; you can also use the touch screen to modify the parameter.
Table 2-53 VSWR Ref Value
Parameter
Remarks
Default
0 dB
Range
-200 dB to 200 dB
Unit
dB
Knob Step
1 dB
Left/Right Arrow Key Step
Up/Down Arrow Key Step
10 dB