A digital signal composed of a pulse of positive voltage represents a(n) ____.

A(n) ____ signal is designed to represent computer data in a discrete high (on) or low (off) state.

In the accompanying figure, the text ?click to add title? is the title ____.

Each persons digital shadow is ____.

If a Z-Transform is evaluated on the unit circle at evenly spaced points only, it becomes __________.

For the signal x ( t ) = 3cos50πt + 10sin300πt – cos100πt , nyquist rate is________.

Thermal noise can be considered to be ___________.

The periodogram is _________.