Keithley 2520, Service Manual, Page: 11 / 137

List of Illustrations
1 Performance Verification
Figure 1-1 Testhead connections .......................................................................................... 1-7
Figure 1-2 Connections for voltage measurement verification tests .................................... 1-9
Figure 1-3 Connections for current source verification tests ............................................. 1-10
Figure 1-4 Parallel resistor construction ............................................................................. 1-10
Figure 1-5 Resistor mounting and connections .................................................................. 1-11
Figure 1-6 Connections for current source pulse verification tests .................................... 1-12
Figure 1-7 Connections for DETECTOR 1 current measurement verification tests .......... 1-13
Figure 1-8 Connections for DETECTOR 2 current measurement verification tests .......... 1-14
Figure 1-9 Connections for DETECTOR 1 voltage bias source verification tests ............ 1-15
Figure 1-10 Connections for DETECTOR 2 voltage bias source verification tests ............. 1-16
2 Calibration
Figure 2-1 Testhead connections ........................................................................................ 2-10
Figure 2-2 Voltage measurement calibration connections ................................................. 2-12
Figure 2-3 Current source calibration connections ............................................................ 2-13
Figure 2-4 Pulse low calibration connections .................................................................... 2-15
Figure 2-5 Detector 1 voltage bias source calibration connections .................................... 2-16
Figure 2-6 Detector 2 voltage bias source calibration connections .................................... 2-17
Figure 2-7 Detector 1 current measurement calibration connections ................................. 2-18
Figure 2-8 Detector 2 current measurement calibration connections ................................. 2-19
Figure 2-9 Compliance calibration connections ................................................................. 2-20
3 Routine Maintenance
Figure 3-1 Model 2520 rear panel ........................................................................................ 3-2
4 Troubleshooting
Figure 4-1 Overall block diagram ........................................................................................ 4-6
Figure 4-2 Analog circuitry block diagram .......................................................................... 4-8
Figure 4-3 Power supply block diagram ............................................................................ 4-10
Figure 4-4 Digital circuitry block diagram ......................................................................... 4-12