58 Keysight FieldFox Handheld Analyzers Service Guide
Theory of Operation
Measurement Group
5-
Measurement Group
The measurement group produces a stable output signal by phase locking a
synthesized voltage-controlled oscillator (VCO).
The measurement group consists of the:
— A4 RF Board
— A5 System Board
— A6 SOM Board
— A7 Real Time Clock Board
— Main Battery
A simplified RF block diagram is provided in Figure 5-2.
A simplified system block diagram is provided in Figure 5-4.
A4 RF Board
A basic function of the A4 RF board is to provide a signal source and receivers
for the analyzer functions.
There are two sections to the A4 RF board:
—NA RF section
— SA RF section
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