Rf Section Troubleshooting (N8973B, 74B, 75B Analyzers); What You Will Find In This Chapter - Keysight N8973B Service Manual

Keysight NFA Series Noise Figure Analyzers
Service Guide
4 RF Section Troubleshooting
(N8973B, 74B, 75B Analyzers)

What You Will Find in This Chapter

The following information is found in this chapter:
1. Theory of operation of the RF section
2. Isolating the cause of an hardware problem by verifying the functionality
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.
This following descriptions are found in this chapter:
of assemblies in the RF section signal path.
RF Section Description on page 134
Troubleshooting on page 142
Quick Check to Verify the Low Band Signal Path on page 142
Troubleshooting a Low Band Problem on page 146
Quick Check to Verify High Band RF Path #1 on page 169
Troubleshooting a High Band Problem on page 173
High Band Preamp (Standard Option P07, P26) on page 198
High Band Mixing Equations on page 198
133