RIGOL
Chapter 2 Functions of the Front Panel
2-8
VNA User Guide
Ref Position
Sets the reference position.
When it is set to 5, the reference position is located in the middle of the graticule;
when set to 0, it is at the bottom of the graticule; when set to 10, it is located at the
top of the graticule.
Table 2-8 Ref Position
Parameter
Remarks
Default
[1]
0 or 5
Range
0 to 10
Unit
N/A
Knob Step
1
Left/Right Arrow Key Step
1
Up/Down Arrow Key Step
Note
[1]
:
The default values of the reference position for different trace formats are as follows:
⚫
0: Lin Mag, SWR, Lin Mag(DTF), and Log Mag(DTF)
⚫
5: Log Mag, Phase, Group Delay, Real, Imaginary, Expand Phase, Positive Phase, and
Return Loss (DTF).
Remarks:
⚫
By default, when "SWR" or "Lin Mag" is selected for the trace format, the
reference position is located at the bottom of the Y axis; for other trace formats,
the reference position is located in the middle of the Y axis.
⚫
When the format is "Smith" or "Polar", the reference position is unavailable. The
Ref Position
menu is unavailable.
Scale/Div
Sets the Y scale per division of the selected trace. The scale value is displayed at the
graticule top.
When you select a different trace format, the default Y-axis scale value and unit are
different.
Table 2-9 Scale/Div
Trace Format
Default
Range
Unit
Log Mag
10
100f to 100G
dB
Lin Mag
100
1a to 100G
N/A
Phase
90
1a to 100G
degree (°)
Group Delay
10
1a to 100G
ns
Real
200
1a to 100G
N/A
Imaginary
200
1a to 100G
N/A
SWR
1
-
N/A
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