User Manual

1.3 Interconnection and Block Diagrams
11
1
Chapter 1 Overview
Internal Block Diagram
System Circuit Description
All subsystems in the instrument are microprocessor (CPU) controlled.
Each input module contains an A/D converter that connects to the instrument
through an isolation device. (The isolation devices are in the input modules.)
In addition, separate power supplies are provided for each channel, electrically
isolating them from the instrument.
After processing by the CPU, measurement data is stored in memory for display
on the LCD or output to the printer. Data can be saved to and reloaded from a
PC Card, MO disk or other external storage media.
Storage
Control
Storage Bus
Bridge
UNIT1-1
UNIT1-2
UNIT4-2
UNIT5-1
UNIT5-2
UNIT8-2
Storage
Control
Storage
Memory
(max. 1 GWord)
8861
I/O Control
Printer
(optional)
I/O
CPU
Key Control
Operating
Section
LCD
Monitor
Output
Mouse Jack
Keyboard
Jack
USB Port
LAN
Controller
LAN
Jack
PC Card
Controller
PC Card
Slot
Model
9717
MO Unit
Model
9718
HD Unit
or
(optional)
Logic Probes
LOGIC(CH)
Ａ
LOGIC(CH)
D
Logic Probes
Storage
Memory
(max. 1 GWord)
ADC
Isolation
Device
ADC
Isolation
Device
ADC
Isolation
Device
ADC
Isolation
Device