Figure 4-8
U9 Voltage Source Error Status Word
.......
Figure 4-9
IEEE-488 Connector.
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Figure 4-10
IEEE Connections.
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Figure 4-11
IEEE-488 Connector Location.
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Figure 4-12 Contact Assignments.
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SECTION
5 -Performance Verification
Figure 5-l Setup for Picoammeter Verification. . .
Figure 5-2 Setup for Voltage Source Verification (Model 487)
SECTION 6
- Theory of Operation
Figure 6-1
Figure 6-2
Figure 6-3
Figure 6-4
Figure 6-5
Figure 6-6
Figure 6-7
Figure 6-8
Figure 6-9
Figure 6-10
Figure 6-11
Figure 6-12
Figure 6-13
Figure 6-14
Figure 6-15
Figure 6-16
Figure 6-17
Overall Block Diagram
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Simplified Model of Input Amplifier
.......
Zero Check Configuration
................
Offset Voltage Adjust Circuit
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Analog Filter Circuitry
...................
Multiplexer .............................
Multiplexer Phases.
......................
Analog Output Circuit (Simplified) .
Simplified Model of V-Source (Model 487)
Analog Control Circuitry
.................
Control Word
...........................
A/D Converter Simplified Schematic.
Digital Block Diagram.
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Memory Map
...........................
Simplified Block Diagram of Serial Port.
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Display Block Diagram.
..................
Power Supply Block Diagram
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SECTION 7
- Maintenance
Figure 7-l
Cal Lock Switch
Figure 7-2 Setup for Picoammeter Calibration.
Figure 7-3
Setup for Voltage Source Calibration (Model 487)
Figure 7-4 ExplodedView..................................
Figure 7-5 Test Point, R198 and R203 Locations,
Figure 7-6 Integrator Output (Typical)
APPENDICES
Figure E-l
IEEE-488 Bus Configuration.
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Figure E-2
IEEE-488 Handshake Sequence
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Figure E-3
Command Codes
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.
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4-36
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. . . .
4-46
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. . .
447
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4-47
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4-47
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5-3
5-5
6-l
6-2
6-2
6-2
6-3
6-4
. 6-5
. . . ..I. . 6-5
6-5
6-7
6-8
6-9
6-10
6-11
. .
6-12
6-13
6-14
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7-2
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7-4
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7-5
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7-10
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7-14
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7-17
E-2
. . .
E-3
. . .
E-6
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