Theory of Operation
3-2
TDS5000B Series Service Manual
Display System. Text and waveforms are processed by different parts of the
display circuitry. The display system (display adapter board and inverter board)
sends the text and waveform information t o the display panel.
Touch Pane l (Optional). The display board sends information from the touch panel
to the processor. Any changes in settings are reported to the processor system.
The software that operates on the PC motherboard reads the front-panel switches
and encoders. Any changes in their settings are reported to the processor system.
The software also turns the LEDs on and off.
Menu Switches. Front-panel m enu switches are also read by the software. The
touch screen processor sends any changes in menu selections to the processor
system. T he ON/ST BY switch passes through the PC Interface board to the PC
motherboard. The PC motherboard creates the signal sent to the power supply to
toggle power.
Processor System. The processor system i s a collection of hardware, software,
and the Windows operating system. The processor system provides a CPU for
performing calculations on data, floppy and CDRW disk drives for data storage,
and I/O for interacting with data. The disk drives, the PC interface board, the
motherboard, and any peripherals are all components of the processor system.
Floppy Drive. The floppy drive provides access to stored waveform data and
software to customize your oscilloscope.
PC Interface Board. The PC Interface board provides a data path between to the
Acquisition board and t he display system. The PC Interface board provides a
GPIB interface through a side panel connector.
PC Motherboard. The PC motherboard provides standard Windows functionality
and I/O port interfaces to the rear panel. The P C motherboard also reads the
front-panel switches and encoders and implements any changes requested by
their settings.
Front Panel
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