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90000 A-Series Service Guide
7
Theory of Operation
A conductive element on the inside of each key shorts a gap on the underlying
keyboard circuit board. The keyboard controller detects this short and sends the
proper keypress information to the system controller on the motherboard.
Keyboard block diagram
The front panel provides:
• Dedicated knobs and pushbuttons for major oscilloscope functions
• A 12.1 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
Rear panel
The rear panel provides several connections:
• The line power input
Содержание Infiniium 90000A Series
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