1. The digital multimeter (DMM) precision: good speed: slow points: single recording: pen & pencil

2. The chart recorder Figure from Wheeler and Gangi, Introduction to Engineering Experimentation time voltage precision: poor speed: slow points: multiple recording: hard copy

3. The oscilloscope time voltage precision: poor * speed: fast points: multiple recording: film * * A digital oscilloscope can overcome these limitations

4. How an oscilloscope works Figure from Wheeler and Gangi, Introduction to Engineering Experimentation

5. Precision error reading a ‘scope Full scale = 8 “boxes” !

6. Computer-based data acquisition precision: good speed: fast points: multiple recording: file

7. Multi-channel data acquisition system Figure from Wheeler and Gangi, Introduction to Engineering Experimentation

8. Computer-based DAQ: signal path 1 2 4 3

9. Multiplexer (a.k.a. MUX) Figure from Wheeler and Gangi, Introduction to Engineering Experimentation Considerations: crosstalk transfer accuracy