Agilent Technologies E5070B, Руководство пользователя

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304 Chapter 7
Fixture Simulator
Determining the Characteristics that Result from Adding a Matching Circuit
to a Differential Port
NOTE
For a network defined in a user file, it is assumed that port 1 is connected to the test port
and port 2 is connected to the DUT.
The setup steps are shown below.
Step 1. Press -
Fixture Simulator - Diff. Matching
.
Step 2. Press
Select Port
.
Step 3. Press
1
,
2
, or
3
to select the port on the DUT to which a differential matching circuit will
be added.
Step 4. To add a matching circuit defined in a user file, perform the following operations:
a. Press
User File
.
b. Using the dialog box that appears, select the 2-port Touchstone data file (.s2p format)
for the matching circuit to be added.
Once you have specified the user file, the selection of
Select Circuit
automatically changes
to
User
. In this case, you do not have to execute Step 5 and Step 6.
Step 5. Press
Select Circuit
.
Step 6. Select a differential matching circuit model (Figure 7-19).
Softkey Function
None
The matching circuit is not added.
Shunt L - Shunt C
Selects a circuit model consisting of a shunt inductor and a shunt
capacitor
User
Selects the circuit model defined in the user file imported in Step 4
Step 7. Specify the values for the elements in the circuit model selected.
Softkey Function
C
Specifies the capacitance [F]
G
Specifies the conductance [S]
L
Specifies the inductance [H]
R
Specifies the resistance [
Ω
]
NOTE When either of the two components of Shunt-L, “L” and “R”, is set to 0, the component is
defined as "Short”; when both components are set to 0, they are defined as "Open."
Step 8. Repeat Step 3 to Step 7 to set up the differential matching circuit to be added to the selected
ports on the DUT.
Step 9. Press
Diff. Matching
to turn the differential matching circuit
ON
.
Step 10. Press
Return
.