TLA600 Series Logic Analyzer Service Manual
3- 1
Theory of Operation
This section provides a brief overview of the board level theory of operation for
the logic analyzer. Refer to page 9--1 for a functional block diagrams.
Hardware
The logic analyzer contains the following major components:
An NLX mother board based on an Intel Celeron microprocessor and the 810E
chip set runs the operating system software in the TLA600 series logic analyzers.
This controller provides the hardware connections to the following devices:
H
USB port
H
PS2 mouse and keyboard
H
Serial port
H
Parallel port
H
SVGA port
The NLX mother board receives power through a riser board connected to the
interface board. The mother board communicates with the interface board
through the PCI bus and the USB bus.
The Riser board connects the NLX mother board to the interface board. It also
has the connections to the hard disk drive and to the CD-ROM drive.
The interface board contains the circuitry to interface the PCI bus to the VXI bus
to route the external signal and trigger I/O signals to generate the CLK10
reference. This generates the display signals for the internal display system (if
used).
The IA bus allows communication with the instrument. This is a message-based
system that allows SCPI commands sent from the NLX/Interface controller to
the LPU circuitry on the acquisition board.
This board connects the power supply to the Interface board and to the acquisi-
tion board.
Controller Board
Riser Board
Interface Board
IA Bus
Power Distribution (Rear)
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