Theory of Operation
TPS2000 Series Digital Storage Oscilloscopes Service Manual
3-- 5
The Front Panel board for four-channel oscilloscopes is effectively two front
panels in parallel. The left side of the board is largely handled by the display
ASIC for channels 1 and 2. The right side of the board is handled by the channel
3 and 4 ASIC. Separate front-panel ICs support these data paths.
The front panel contains three LEDs that light to indicate when the Save,
Autorange controls , or the multipurpose knob are active. In addition, most
buttons have a LED behind them for illumination in low-light conditions. Button
illumination can be turned off in the Utility menu.
The Acquisition board includes an FPGA that manages communication between
the microprocessor and the internal program memory (FLASH), RTC (Real-Time
Clock), battery system, and temperature sensor. The temperature sensor is used
for fan control.
The Acquisition board FPGA also manages communication between the
microprocessor and external RS-232 port, Printer Port, and Compact FLASH
Card.
Four-Channel
Oscilloscopes
LEDs
Internal Peripherals
External Peripherals
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