Extending The Calibration Plane (Removing The Cause Of Error); Setting The Port Reference Impedances - Agilent Technologies ENA Series User Manual

6. Extending the Calibration Plane (removing the cause of error)

In this section you will use the port extension function to remove an electrical delay caused
by cables or fixtures located between the calibration reference plane and the DUT to be
evaluated. If you can provide a two-port Touchstone data file representing the
characteristics of the network to be removed, the network removal function allows you to
remove the network and extend the calibration reference plane.
Follow the procedure below to set port extension for each test port.
Setting Description
Port extension of test port 1: 260 ps
Port extension of test port 2: 260 ps
Port extension of test port 3: 260 ps
Port extension: ON
Figure 15-29 shows the results of extending the calibration reference plane.
Figure 15-29 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 permits the impedance of the balanced ports'
common mode to be automatically set to Z
to be automatically set to 2Z
Chapter 15
Measuring an Unbalanced and Balanced Bandpass Filter
Key Operation
Extension Port 2
Extension Port 3
Extensions
and the impedance of their differential mode
0/2
.
0
Measurement Examples
- -
Port Extensions Extension Port 1
-
-
(turns it )
ON
-
,
0
515