Operation In Modes - Agilent Technologies FieldFox N9923AN Service Manual

Theory of Operation

Operation in Modes

Operation in Modes
The N9923AN FieldFox RF Vector Network Analyzer User's Guide (Part Number
N9923-90006) describes the various modes of operation and describes the user interface for
each mode. The following information describes how the hardware is used in the various
modes to make measurements.
There are four basic modes of operation:
• CAT—Cable and Antenna Test
• NA—Network Analyzer
• VVM—Vector Voltmeter
• PM—Power Meter
CAT, NA, and VVM modes make similar measurements but are separate modes of
operation.
Additional modes of operation may be created as new firmware is developed. The four basic
modes listed above represent how the hardware may be used to make basic measurements.
Additional modes will provide customized user interfaces but will not change how the basic
measurements are performed.
The following table indicates port functionality for each mode of operation and the
required options. See
Table 5-1. Port Function by Mode
Measurement PORT 1
Mode Port
CAT
Input/Output
(Return Loss)
CAT
Output
Insertion Loss
NA
Input/Output
S11
NA
Input
S12
NA
Output
S21
NA
Inactive
S22
VVM
Input/Output
1-Port
VVM
Output
2-Port
Power Meter Inactive
For a given mode, the analyzer "remembers" the most recent state of the current mode
when you change to another mode.
5-18
"Service Related User Operations"
PORT 2
Port
Inactive
Input
Inactive
Output
Input
Input/Output
Inactive
Input
Inactive
RF Vector Network Analyzer
in Chapter 8 for details.
Required
Option(s)
305
305
None
(standard)
122
None
(standard)
122
308
308
302
Service Guide N9923-90005
N9923AN