The theory
Sampling theory is a subset of communications theory
- Same basic math
- Want to record signal, not noise
- Quantization: Conversion from analog to discrete values
- Coding: Assigning a digital word to each discrete value
- Thermometer code, Gray code...
Quantization adds noise
- Analog signal is continuous
- Digital representation is approximate
- Difference (error) is noiselike
Datel Data Acquisition and Conversion Handbook