Operation In Modes - Keysight N9912A Service Manual

Theory of Operation

Operation in Modes

Operation in Modes
The FieldFox User's Guide 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
• SA—Spectrum Analyzer
• PM—Power Meter
CAT and NA modes have similar capabilities 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 the
"Service Related User Operations"
Table 5-1. Port Function by Mode
Measurement RF OUT
Mode Port
CAT
Input/Output
(One Port)
CAT
Output
Insertion Loss
NA
Input/Output
S11
NA
Output
S21
SA Inactive
Power Meter Inactive
For a given mode, the analyzer "remembers" the most recent state of the current mode when you change to
another mode.
For most screens under System 7 key, the current measurement mode continues to operate while the screen
is displayed. For instance, while the battery information screen is displayed, the measurement mode
remains active.
There are two exceptions to this:
• the "Options (Licensing)" screen
• "Error Log" screen
When either of these screens is displayed, the firmware is in a special monitor mode and measurements are
5-20
section of Chapter 8 for more details.
RF IN
Port
Inactive
Input
Inactive
Input
Input
Inactive
Required
Option(s)
None
(standard)
110
303
110 and 303
230 or 231
302
Service Guide N9912-90003
RF Analyzer
N9912A