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Troubleshooting
2-7
Figure 2-1
Model 2002 overall block diagram
Amps
Sense HI
Sense LO
Input HI
Input LO
DC Input
Signal
Conditioning
Amps
AC Input
Signal
Conditioning
(w/freq)
Scanner Output
Scanner
Inputs
Scanner
Option
Power Supply
F/R Status
DC SIG/REF
DC/MUX FETS
TRMS,
AVE,
PK
FREQ Out
AC FETS
Scanner Control Out
Line FREQ In
ADC
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
5
6
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
55 Vdc
5 Vdc
5.5 Vac
ADC Data In
Digital
IEEE
Data Out
(DMA)