Tektronix TLA5201, Service Manual

Page: 36 / 141

TLA5000 Series Service Manual
3- 1
Theory of Operation
This chapter provides a high-level overview of the board level theory of
operation for the logic analyzer. Refer to the
Diagrams chapter for a functional
block diagram of the instrument.
Hardware
The logic analyzer controller contains a PC motherboard and microprocessor
system that controls the entire instrument. The instrument features a flat-panel
display, front panel keyboard with control knobs, probe interface, and external
connections for a keyboard, mouse, and other PC accessories.
The Intel Micro ATX mother board provides all the benefits of a high-perfor-
mance PC-based mother board. The mother board contains the microcontroller,
memory, battery, and input-output components typically used with a PC.
The following peripheral interfaces are included:
H
One parallel port
H
Four USB 2.0 ports (two external, two internal)
H
Two serial ports (one internal, one external)
H
Two IDE interfaces supporting up to ATA-100
H
Floppy disk drive interface
H
PS/2 keyboard and mouse ports
H
10/100 Mbit/s LAN port
H
Secondary display connector
The Interface board connects the mother board to the rest of the instrument
through the PCI connector. The interface board contains the following circuitry:
H
LPU Circuitry. The LPU circuitry controls the acquisition system using a
68360 microprocessor.
H
Internal Display. The interface board contains the display controller that
drives the 1024 X 768 resolution as well as an external display connector.
The display signal at the external primary connector is identical to the
General
Mother Board
Interface Board