Block-Level Theory; Power Supply Assembly - Keysight Infiniium 9000 Series Service Manual

7
Theory of Operation

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
• 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.

Power Supply Assembly

The AC input to the power supply is 100–240 VAC ±10%. Maximum input power is
375 W. The AC input frequency is 50 to 60 Hz.
Filtered voltages of +5 V, +3.3 V, +2.5 V, +2.25 V, +1.8 V, +1.6 V, +1.2 V, -12 V, -6 V,
-5 V, and -3.8 V are supplied and distributed throughout the oscilloscope.
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graphical interface display
Infiniium 9000 Series Oscilloscopes Service Guide