System Impedance (Z0); Port Extensions - Keysight FieldFox B Series User Manual

NA (Network Analyzer) Mode
NA Mode Settings

System Impedance (Z0)

To accurately view data presented in Smith Chart format, first set the System
Impedance.
Learn how to select Smith Chart format in
Learn how to make 75Ω measurements at the FieldFox Supplemental Online
Help:
https://www.keysight.com/us/en/lib/resources/service-manuals/keysight-fi
eldfox-library-help-and-manuals-2153870.html.
How to set System Impedance
1. Press Meas Setup 4 > Settings.
2. Then scroll to System Z0 and press
3. Then type either 50 or 75 and press

Port Extensions

Port extensions allow you to electrically move the calibration reference plane
on either port 1 or port 2 after you have performed a calibration.
Why use Port Extensions
Use port extensions if you are unable to perform a calibration directly at your
device because the location is not accessible. Perform a calibration at a
convenient place, then use port extensions to compensate for the time delay
(phase shift) to the desired reference plane. On the FieldFox, port extensions
does not compensate for the loss of the additional electrical length, nor any
mismatch errors beyond the calibration reference plane.
Also, use port extensions if you have already performed a calibration, and then
decide that you need to add a length of transmission line in the measurement
configuration. Use port extensions to "tell" the FieldFox that you have added
the length to a specific port.
— With S11 and S22 reflection measurements, the FieldFox doubles the port
— With S21 and S12 transmission measurements, the port 1 and port 2
Port extensions and Electrical Delay differ in the following ways:
108
b. Then enter a value using the numeric keypad, the
arrows, or the rotary knob.
c. Press Enter.
extension valued that you enter to account for the additional delay in the
forward and reverse directions.
extensions are added together. This accounts for the total transmission
delay going through ports 1 and 2.
"Format" on page 98.
Edit
Enter
Keysight N9938-90006 User's Guide