How To Calculate The Vswr Of A Test Port - Agilent Technologies N4413A User Manual

How to Calculate the VSWR of a Test Port

The user-defined display can be used to calculate the VSWR of a device port from the
reflection parameters. Consider a DUT with one single-ended port and one balanced port.
In general, the VSWR equation is in the form:
VSWR
where S is the reflection parameter corresponding to the port and mode of interest. For this
device, the table summarizes the correct variable for S:
Port Mode
1 N/A
2 Differential
3 Common
Therefore, the VSWR of each port can be calculated in the user-defined display as follows:
Port Mode
1 N/A
2 Differential
3 Common
For information regarding user-defined displays, refer to
Page..." on page 139.
Chapter 3
1 + S
-------------- -
=
1 – S
S
S11
SDD22
SCC22
(1+MAG(S11))/(1-MAG(S11))
(1+MAG(SDD22))/(1-MAG(SDD22))
(1+MAG(SCC22))/(1-MAG(SCC22))
How to Calculate the VSWR of a Test Port
VSWR
"Data > User-Defined Display > Add
Using the Multiport Test System
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