53
Keysight FieldFox Handheld Analyzers
N991xA, N992xA, N993xA, N995xA, N996xA
Service Guide
5 Theory of Operation
Information in This Chapter
This chapter provides a general description of the operating theory of the
FieldFox analyzer.
— Theory of operation is explained to the assembly level only.
— Component-level circuit theory is not provided.
— Simplified block diagrams are included for each functional group.
Section Title Summary of Content Start Page
Analyzer System Operation A summary of the theory of operation for the analyzer.
A summary of the operation of the major functional groups
of the analyzer.
page 54
Front Panel Group Operation of the assemblies associated with the front panel
group of assemblies.
page 56
Measurement Group Operation of the assemblies associated with the
measurement group of assemblies.
page 58
Operation in Modes Description of the different operating modes and what
hardware is used in each mode.
page 78
Temperature Related
Information
Information about temperature sensors and how the
analyzer responds to temperature information gathered.
page 82
User Calibration in CAT, NA, and
VVM Modes
Descriptions of one port and two port calibrations for the
CAT and NA modes of operation.
page 83
Firmware Related Information Information about firmware and firmware upgrades. page 85
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