Keithley 486 Instruction Manual page 33

Figure 4-8
U9 Voltage Source Error Status Word .......
Figure 4-9 IEEE-488 Connector. .....................
Figure 4-10 IEEE Connections. .......................
Figure 4-11 IEEE-488 Connector Location. .............
Figure 4-12
Contact Assignments. ....................
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 ...................
Simplified Model of Input Amplifier .......
Zero Check Configuration ................
Offset Voltage Adjust Circuit ..............
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. ...................
Memory Map ...........................
Simplified Block Diagram of Serial Port. ....
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. .............. .......
Figure E-2 IEEE-488 Handshake Sequence ............
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Figure E-3 Command Codes ........................
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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
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E-3
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E-6