A data acquisition system monitors the sounds created by bats in a cave which have an audio range of 10 Hz to 20 kHz. Assume that a pulse code modulation (PCM) system that represents each sample point by 8-bits is used to digitise the analogue sound emitted by the bats. Calculate the smallest amount of digital data that completely represents the analogue signal that can be generated each second by the system

The following figures show part of an analogue signal being digitised, at two different sampling rates. Make your explanation brief. (1) Explain how the difference in the sampling rates in figure 1 and figure 2 will affect the file sizes after digitisation. (ii) Which of the two sampling rates would you consider to be the least efficient to reproduce the original analogue signal accurately? (iii) What is the preferred digital sample rate (frequency) of an analogue audio signal that would be needed to accurately reproduce the original signal? Figure 1 Figure 2 15 14 13 12 11 10 6. 8 7 6 15 14 13 12 11 10 4 (iv) Draw the digital signals corresponding to the analogue signals is Figure 1 and Figure 2.

A temperature sensor operates in the range of 0 to 80 degree Celsius and it is converted into voltage output between 0 to 8 volt. If the 4 bits ADC is used, then answer the following questions. 1) Draw a quantization map 2) If the temperature is 20 what will be the digital output from ADC, show your computation. 3) If we pass through result from ADC back to DAC what is the temperature value. Show detail computation.

orescribed action accordingly. A) Regulating trade, B) monitoring functions. C) measure physical quantities, D) standard units. 2)A--------- a an output that varies in discrete steps and so can only have a finite number of values. A) Analogue instruments, B) digital instrument, C) Null-type ,D) passive instrument. ) a good measurement technician can substantially reduce errors at the output of a measurement system by---------?

Explain why co-channel interference is minimum in spatial modulation MIMO?