Agilent Technologies 16900A, Service Manual

Page: 104 / 130

104 16900A, 16902A, and 16903A Service Guide
8
Theory of Operation
Theory of Operation
This chapter describes the theory of operation for the logic
analysis system and describes the self- tests. The information
in this chapter is to help you understand how the logic
analysis system operates and what the self- tests are testing.
This information is not intended for component- level repair.
16900A and 16902A Systems Block-Level Theory
The block- level theory includes the theory of operation of
the logic analysis system in terms of the major subsystems
including:
• CPU subsystem
• PCI board
• MIB (module interface board)
• I/O (input/output) board
• Front panel assembly
CPU MOTHERBOARD
PCI Board
Module Interface Board
IO Board
Front Panel
Interface Board
Keypad Board
12.1" Flat
Panel LCD
Display
12.1" Touch
Screen Grid
RS232
Grid Scan
Pr
im
ar
y PC
I Bus
DC FANS
CDROM IDE Bus
12V to 24V
IDE
B
US
- CDRO
M
Front
Panel
On/Off
Digital Video
RS232
+3.3V, +5V, +12V
Digital Video
Rear
Panel
On/Off
CP
U P
O
W
E
R
CO
NNE
CT
O
R
CP
U O
n
/O
ff
Re
se
t
Hard Disk
Drive
ID
E
BU
S
Disk Drive Power
Module Bus
Digital Video
RS232
Rear Panel
Switch
JTAG Control
+3.3V, +5V
Module Bus
Module Triggers
Module ARMs
Flags
100 MHz Clock
CPU On/Off Reset
JTAG Control
Rear Panel Signals