What do the sample values represent?
Analog-to-digital converters (ADCs) are usually used to produce PhysioBank signal files, which consist of sequences of integer samples in unscaled analog-to-digital converter units (adus). Samples are stored in this way not only because doing so usually requires less space than most alternatives, but also because this scheme introduces no loss of precision beyond the quantization error of the ADC. By default, rdsamp outputs sample values in unscaled adus (raw ADC units). The header file for each record contains fields that describe the characteristics of each signal and of the ADC used to digitize it. These fields include the signal type (such as ECG, ABP, or SpO2), the physical units of the original analog signal (such as mV, mmHg, or degreesC), the gain (the number of adus per physical unit), the baseline (the sample value that would correspond to a physical value of zero, which is often but not always at the center of the ADC range, and may even lie outside of the ADC range), the ad
Analog-to-digital converters (ADCs) are usually used to produce PhysioBank signal files, which consist of sequences of integer samples in unscaled analog-to-digital converter units (adus). Samples are stored in this way not only because doing so usually requires less space than most alternatives, but also because this scheme introduces no loss of precision beyond the quantization error of the ADC. By default, rdsamp outputs sample values in unscaled adus (raw ADC units). The header file for each record contains fields that describe the characteristics of each signal and of the ADC used to digitize it. These fields include the signal type (such as ECG, ABP, or SpO2), the physical units of the original analog signal (such as mV, mmHg, or degreesC), the gain (the number of adus per physical unit), the baseline (the sample value that would correspond to a physical value of zero, which is often but not always at the center of the ADC range, and may even lie outside of the ADC range), the ad
Related Questions
- In the pop-up window describing the sample in each well, the highlighted section has values for normal, lesion, tumor, etc. What do these values refer to?
- Parallel measurements of my DNA sample showed concentration variations within the individual measurement values. What can cause this?
- Which statement is TRUE regarding BOD and COD sample values?
