Keithley 6517 - Figure 5-1 Model 6517 A Overall Block Diagram

Troubleshooting
5-3
Figure 5-1
Model 6517A overall block diagram
Input
Preamp
and
Prescaler
Scanner Output Scanner Inputs
Scanner
Option
Voltage Source
Scanner Control Out
Control
A/D
Converter
CLK
DATA
STB
TRG
O
P
T
O
I
S
O
Hardware Trigger
Trigger
Select
Logic
ADC Data In CLK DATA STB
Control Data Out
Trigger Delay
Software Trigger
External Trigger, Meter Complete, Trigger Bus
48
Digital I/O 68302
Front Panel Reset Front Panel Clock Front Panel Data Out Front Panel Data In
IEEE Data In (ISR)
GPIB
IEEE-488 Bus
Front
Panel
Controller
5 Vdc
ADC Data In
Digital
IEEE Data Out (DMA)
Preamp Out
V-Source
Out