Delta modulation is the process of converting the message signal x(t) in 1-bit (two level) quantizer form, ie; ? ?. The correlation between the adjacent signals is increased purposely. In this way the prediction, there by the quantization error can me small.
Using this trainer it is possible to study modulated step size ? at the integrator output and compare with the calculated value. It is possible to compare the message signal and integrator output and analysis can be made on this observation. It is possible to observe the occurrence of granular noise, and slope overload noise as a function of variable parameter.
The following responses can be observed for the above functions, by varying the Message amplitude. By varying the sampling frequency. By using a total harmonic distortion (TDH) analyzer it is possible to measure the % of harmonic distortion. It is also possible to plot the THD by measuring the message signal frequency fc, Amplitude fa, ? step size, and the sampling frequency fs.
This instrument requires an external function generator in the rang eof 100 to 10KHz with PtoP amplitude of 8V, a dual beam Oscilloscope, an true RMS voltmeter.
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