Analyzer System Operation; Functional Groups Of The Analyzer - Keysight N9912A Service Manual

RF Analyzer
N9912A

Analyzer System Operation

The N9912A RF analyzer operates as both a network analyzer (NA) and a spectrum analyzer (SA). The NA
functions support the CAT mode.
• The NA function supports one port measurements using the RF OUT port and two port measurements
using both the RF IN and RF OUT ports.
• The SA function supports measurements using the RF IN port.
See Figure 5-1 for a simplified block diagram of the overall RF analyzer system.
All N9912A RF analyzers have the same hardware. Options to increase functionality are enabled via
licenses, additional hardware is not required.

Functional Groups of the Analyzer

The operation of the analyzer can be separated into two major functional groups. Each group consists of
assemblies that perform distinct functions. Some of the assemblies are related to more than one group, and
both groups, to some extent, are interrelated and affect each other's performance.
The major functional groups are:
• Front Panel Group
• Measurement Group
Front Panel Group
The front panel group consists of the following:
• A2 LCD Assembly
• A3 Front Panel Interface Board
Measurement Group
The measurement group consists of the following:
• A4 RF Board
• A5 System Board
• A6 SOM Board
• Main Battery
Service Guide N9912-90003
Theory of Operation
Analyzer System Operation
5-3