Chapter 8: Theory of Operation
Block-Level Theory
153
Motherboard
The motherboard provides all system control and interface functions for the oscilloscope.
It contains a CPU, ROM, and RAM; keyboard and mouse interfaces, serial and parallel
interfaces, CDROM, hard disk drive interface, and PCI (Peripheral Component
Interconnect) buses.
Display Board
The Display Board controls the flat- panel display monitor. It translates the video signals
from the motherboard’s on- board video system to the Low Voltage Differential Signal
(LVDS) signals that drive the FPD monitor. The display board also provides +12 V to
the backlight inverter.
Probe Power and Control
The Probe Power and Control board provides filtered, regulated power to the front-
panel AutoProbe interface. It also provides serial communications capability, offset and
probe detection and identification circuitry. All of these are interfaced to the probe
through the conductive pads surrounding the BNC connectors. Using the facilities of
this board, the Autoprobe interface can supply power for active probes, notify the
oscilloscope operating system when a probe is connected or disconnected, identify the
probe type to the oscilloscope operating system for automatic configuration, and
communicate with the probe to support advanced probe functionality.
To Next Page
Loading...
