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Keysight Technologies X-Series Signal Analyzers
N9038A MXE Signal Analyzer
Service Guide
4 Input Selection & Level Control
What You Will Find in This Chapter
The following information is found in this chapter:
1. Theory of operation of the Input Selection and Level Control section.
2. Isolating the cause of an hardware problem by verifying the functionality
of assemblies in the Input Selection and Level Control section signal path.
This following descriptions are found in this chapter:
Input Selection & Level Control Section Purpose on page 132
Input Selection & Level Control Assembly Descriptions on page 133
A9 Input Attenuator A on page 133
A10 Attenuator B on page 145
A23 Limiter Assembly on page 134
SW1 Cal Switch on page 135
SW2 Transfer Switch on page 135
Input Selection & Level Control Section Troubleshooting on page 136
A9 Attenuator A on page 136
A10 Attenuator B on page 145
A23 Limiter Assembly on page 149
SW1 Cal Switch on page 155
SW2 Transfer Switch on page 159
Each section describes how the assembly works and gives information to help you troubleshoot
the assembly. Each description covers the purpose of the assembly, describes the main
components, and lists external connections to the assembly.
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