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Keysight FieldFox Handheld Analyzers
N991xA, N992xA, N993xA, N995xA, N996xA
Service Guide
4 Troubleshooting
Information in This Chapter
The information in this chapter helps you:
— Identify the portion of the analyzer at fault.
— Locate the specific troubleshooting procedure to identify the assembly or
peripheral at fault.
The sections in this chapter are arranged in a logical troubleshooting order.
The following table lists the sections and a brief summary of what to look for in
that section.
Section Title Summary of Content Start Page
Protect Against Electrostatic
Discharge (ESD)
Information pertaining to ESD protection. page 40
FieldFox High-Temperature
Protection
Information about monitoring internal temperatures and
temperature control modes in FieldFox.
page 41
Getting Started with
Troubleshooting
A starting point to begin troubleshooting. page 42
Power Up Troubleshooting Power-up problems: page 44
Front Panel Group
Troubleshooting
Problems with the front panel assemblies of the analyzer.
— Does the display appear correct?
— Is the sound working?
— Do the front panel keys function properly?
— Does the front panel USB and SD card connection
function properly?
page 45
Measurement Group
Troubleshooting
Problems with the measurement group assemblies of the analyzer. page 47
— Problems in NA Mode VNA Specific Troubleshooting
— Checking the A, B, R1, and R2 signals
page 47
— Problems in SA Mode SA Specific Troubleshooting
— Checking source power
page 49
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