Contents
How do you measure sensitivity?
The positive sensitivity is calculated by dividing the measured test signal amplitude by 201. The procedure is then repeated with a negative polarity triangular pulse and adjustment to the amplitude; negative sensitivity is also calculated by dividing the measured test signal amplitude by 201 (BSI, 2003).
How do you differentiate between resolution and sensitivity?
RESOLUTION – the smallest portion of the signal that can be observed. SENSITIVITY – the smallest change in the signal that can be detected.
What is sensitivity and accuracy?
Accuracy is the proportion of true results, either true positive or true negative, in a population. It measures the degree of veracity of a diagnostic test on a condition. The numerical values of sensitivity represents the probability of a diagnostic test identifies patients who do in fact have the disease.
What is sensitivity and accuracy of meters?
Every meter coil has a certain amount of dc resistance. The sensitivity of a meter movement is the maximum current that the movement can measure. Any current greater than this value will very likely damage the meter.
What is resolution sensitivity?
Resolution is the smallest reading difference that is possible in a given measuring instrument. Sensitivity on the other hand is the smallest amount of change in the measured parameter that causes a reading change equivalent to resolution of the equipment.
Which of the instruments is most accurate?
Screw gauge has minimum least count of 0.001cm. Hence, it is most precise instrument.
What is the SINAD value for ADC noise?
If the ADC’s SINAD value of 72.5dB were used instead of SNR (taking into account the ADC’s noise and distortion components), the overall degradation in noise figure due to the RF front-end noise figure and ADC (noise + distortion) would be 2.1dB, which is still below the allocated 3dB for this measurement.
How is the resolution of an ADC system determined?
The resolution of ADC is determined by the number of bits it uses to digitize an input signal. For a 16-bit device the total voltage range is represented by 216(65536) discrete digital values or output codes. Therefore the absolute minimum level that a system can measure is represented by 1 bit or 1/65536thof the ADC voltage range.
What kind of range does an ADC have?
Determine if your ADC is configured for a bipolar, or unipolar range; we’ll call this B. Your data logger has a bipolar range if it can measure signals both above and below zero. It has a unipolar range if can only measure signals that are either above or below zero, but not both at the same time.
Why is ADC noise lower in higher resolution converters?
When higher resolution converters are used, the thermal + quantization noise is lower thereby decreasing the ADC’s effective noise figure. As a result, less gain is needed in the receiver line-up to achieve the receiver noise figure thereby reducing the need for an AGC circuit when higher-level blockers are present.