5-6 Service Guide N5227-90001
Theory of Operation PNA Series Microwave Network Analyzers
Network Analyzer System Operation N5227A
Receiver Group
The receiver converts the test and reference signals to 7.438 MHz intermediate frequency (IF) signals for
signal processing, retaining both magnitude and phase characteristics. The IF signals are converted to
digital information by the digital processing group.
Refer to “Receiver Group Operation” on page 5-25.
Digital Processor and Digital Control Group
The digital processor and digital control group are divided into a front panel group and a data acquisition and
processing group. The front panel group provides communication to the network analyzer. The data
acquisition and processing group provides the output to the display, in addition to signal processing and
analyzer control.
Refer to “Digital Processing and Digital Control Group Operation” on page 5-31.
Power Supply Group
The power supply functional group provides power for the other assemblies in the instrument.
Refer to “Power Supply Group Operation” on page 5-36.
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