Keysight N9923A FieldFox User Manual page 103

Overview
In the FieldFox, both 1-port and 2-port measurement types use a different
configuration setup from the HP/Keysight 8508A Vector Voltmeter.
Typical 8508A measurement configuration –as shown in the 8508A manual.
The above block diagram requires an external source and directional coupler to
measure the electrical length of a DUT or cable to be trimmed. Separate paths are
used to measure the Incident signal (A) and Reflected signal (B). To measure the
ratio of the Reflected/Incident signals, you were required to select B/A for both the
Magnitude and Phase display.
In the FieldFox, the source and directional coupler are inside the instrument. This
allows you to connect the DUT to ONLY the FieldFox Port 1, with NO external
instruments, in order to make Cable Trimming measurements.
See the FieldFox block diagram and Cable Trimming procedures beginning on page
107.
VVM Mode Settings
Select VVM Mode before making any setting in this section.
How to select VVM Mode
 Press Mode
 Then
Measurement Selection
How to select a VVM Measurement
 Press Measure 1
 Then choose from the following:
VVM (Vector Voltmeter) Mode
VVM
1-Port Cable Trimming
o
this measurement on page 107.
2-Port Transmission
o
this measurement on page 108.
1-port reflection measurement. Learn how to make
2-port transmission measurement. Learn how to make
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