Keithley 3940 Service Manual page 8

List of Illustrations
SECTION 1 - Performance Verification
Figure l-l
Figure l-2
Figure l-3
Figure l-4
Connections to Timer/Counter
...............................................
l-3
ConnectionstoModel197ADMM
............................................
l-4
Connections to Wideband AC DVM ...........................................
l-6
Connections to Audio Analyzer
..............................................
l-9
SECTION 2 - Principles of Operation
Figure 2-l
Figure 2-2
Figure 2-3
Figure 2-4
Figure 2-5
Overall Block Diagram .....................................................
2-2
Main Synthesizer Block Diagram ..............................................
2-4
Frequency Synthesizer Address Generator Diagram ....
...........................
2-5
Address Generator Waveform
......
.........................................
2-6
Waveform Memory and D/A Converter ........................................ 2-6
SECTION 3 - Service Information
Figure 3-1
Figure 3-2
Figure 3-3
Figure 3-4
Figure 3-5
Figure 3-6
Figure 3-7
Figure 3-8
Figure 3-9
CoverRemoval ...........................................................
3-3
Analog Board (NP-10375) Calibration Adjustments ................................
3-4
Control Board (NP-21007) Calibration Adjustments ................................ 3-5
Sub Synthesizer Output Connections to Model 197A DMM ..........................
3-6
Main Synthesizer Output Connections to Timer/Counter
...........................
3-7
Main Synthesizer Output Connections to DMM
..................................
3-7
DMM Connections to DC OFS and GND Test Points ...............................
3-8
Power Supply Test Points ................................................... 3-10
Model 3940 Exploded View ..................................................
3-12