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Chapter 2 Functions of the Front Panel
RIGOL
VNA User Guide
2-45
Input/Output
Sets the input/output interface.
Input Impedance
Sets the input impedance for voltage-to-power conversion. The default input
impedance is 5
0 Ω. To measure a 75 Ω device, you s
h
ould use a 75 Ω to 50 Ω adapter
(option) supplied by
RIGOL
to connect the analyzer with the system under test, and
then set the input impedance to 75 Ω.
Smith chart not only shows the reflection coefficient, but also the normalized
impedance. The impedance of the DUT can be obtained through the input
impedance. The formula for the normalized impedance is as follows:
Wherein, T
DUT
is the reflection coefficient.
When the input impedance is set to 50
Ω
, the impedance of the DUT is normalized
impedance * 50; when the input impedance is set to 75
Ω
, the impedance of the DUT
is normalized impedance * 75.
Ext Trig2
Sets
Ext Trig2
to "In" or "Out".
Shortcut Key
Preset
Recalls the preset setting and restores the system settings of the analyzer to a
specified status.
Remarks:
⚫
To set the preset type, press
System
→
Preset
→
Preset Type
to select
"Default" or any one of the items from "User1" to "User6".
⚫
Press
Preset
to recall the specified factory settings or user settings.
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