Theory Of Operation - Keysight 9000 Series Service Manual

Chapter 7: Theory of Operation
Block-Level Theory

Theory of Operation

This Service Guide supports troubleshooting the Keysight Technologies oscilloscopes to assembly level.
Theory of operation is included only as supplemental information. It is not comprehensive enough for
component-level troubleshooting.
Block-Level Theory
The front panel provides:
• Dedicated knobs and pushbuttons for major oscilloscope functions
• An 15 inch (diagonal) color flat panel display for waveform, measurement, and graphical interface
display
• Three front panel USB 2.0 ports
• Precision BNC connectors for channel input signals.
• BNC connector for auxiliary output signal
• AutoProbe interface for probe power and probe control
• A connection for probe compensation
The rear panel provides several connections:
• A parallel printer connection.
• A serial printer connection
• XGA monitor connection
• Mouse and keyboard connections
• LAN 10/1000 connection
• Auxiliary Trigger Input BNC
• 10 MHz Reference Output BNC
• 10 MHz Reference Input BNC
• TTL trigger output BNC
• Four rear panel USB 2.0 ports
The major boards of the oscilloscope are the acquisition board, autoprobe board, and front panel
keyboard (there are several additional minor boards). The boards are part of a PC system complete with
a motherboard, power supply, and LCD display.
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