Overview; Measurement Selection - Keysight N9912A User Manual

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 – taken from 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 RF Out port, with NO external
instruments, in order to make Cable Trimming measurements.
See the FieldFox block diagram and Cable Trimming procedures beginning on page
144.
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 – Option 308
VVM
1-Port Cable Trimming
o
this measurement on page 144.
2-Port Transmission
o
Learn how to make this measurement on page 146.
1-port reflection measurement. Learn how to make
2-port transmission MAGNITUDE ONLY measurement.
141