Theory of Operation
Processor System
The Processor s
ystem contains a microprocessor that controls the entire
instrument. The processor system also contains FLASH ROM, system RAM, and
interfaces to USB ports and the Ethernet port.
Power Converte r
The Mezza nin
e board converts the + 12 V power to other voltages used for the
analog and digital circuitry throughout the system. The +5 V standby power is
used to keep the Front Panel powered up at all times that A C power is connected
to the unit.
Front-Panel Board
The Front Panel board contains a microprocessor that reads the front-panel
buttons and controls, sends this information to the processor system on the Main
board, and controls power to the system. The Front Panel board also generates
the prob
e compensation output signal, provides an interface to the application
modules, and controls p ower to the system.
4 MDO3000 Series Mixed Domain Oscilloscopes Service Manual
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