Chapter 7 311
Replacing Major Assemblies
A3 Front-End Assembly
A3 Front-End Assembly
This procedure applies to:
8592L spectrum analyzers
8593E spectrum analyzers
8594E spectrum analyzers
8594L spectrum analyzers
8594Q QAM analyzers
8595E spectrum analyzers
8596E spectrum analyzers
General Instructions
CAUTION • The A3 Front-End assembly has static-sensitive components. Read
Chapter 15 before proceeding.
• Hold the A3A3 Low-Pass Filter, A3A9 Bandpass Filter, and FL1
Low-Pass Filter firmly in place when loosening or tightening either of
their semi-rigid cables. The cables can be easily damaged if the filters
are allowed to twist.
• The bracket assembly is made up offour separate brackets. Whenever
the brackets are called out in a replacement procedure, they are
designated by the letters A through D, as illustrated in Figure 7-6.
To disassemble the A3 Front-End assembly, refer to the foldouts at the
end of Chapter 12. Chapter 11 provides cable location information for
the various option and model mixes.
The torque specification for all of the SMA connections within the A3
Front-End assembly is 10 inch-pounds. Be sure that the assemblies are
securely mounted during initial loosening or final torquing of the
semi-rigid cables.
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