Setting The Port Reference Impedances - Agilent Technologies ENA Series User Manual

Figure 14-29 Results of Extending the Calibration Reference Plane

7. Setting the Port Reference Impedances

With the reference impedances of two test ports in unbalanced measurements set to Z
conversion of those ports into balanced ports causes the impedance of the balanced ports'
common mode to be automatically set to Z
to be automatically set to 2Z
Step 1. Set the port reference impedance of port 1 on the DUT (unbalanced) to 50 W.
Setting Description
Reference impedance of test port 1: 50 W
Step 2. In order to set the impedance of the differential mode of port 2 on the DUT (balanced) to
200 W, set the impedances of two unbalanced ports before conversion each to 100 W.
Setting Description
Reference impedance of test port 2:
100 W
Reference impedance of test port 3:
100 W
NOTE Always set the reference impedances of the two test ports before balanced conversion to
the same value.
Chapter 14
Measuring an Unbalanced and Balanced Bandpass Filter
and the impedance of their differential mode
0/2
.
0
Keystroke
Port Z conversion
Keystroke
Port 2 Z0
Port 3 Z0
Measurement Examples
- -
Fixture Simulator
- -
Port 1 Z0
-
-
,
0
313