Keysight Technologies N5224A Service Manual page 129

Theory of Operation
Network Analyzer System Operation
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
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
page 5-27.
Power Supply Group
The power supply functional group provides power for the other assemblies in
the instrument.
Refer to
Keysight N5224A/25A Service Guide
"Receiver Group Operation" on page
"Digital Processing and Digital Control Group Operation" on
"Power Supply Group Operation" on page
5-22.
5-32.
5-5