analog fading

[AntonioLao]

Analog inputs and outputs are becoming a thing of the past. One major push is the decision made by the FCC to go digital TV. Theory of telecommunication has for a long time known many disadvantages of analog signals. The first major disadvantage is signal power dispersion or the loss of signal strength and intensity which necessitated strong broadcasting power signal output at the source thus increasing the heights of the transmission towers as well as the costs of building such towers. On the receiving end of the signals, probability of reception is directly proportional to the length of the receiving antennae. The longer the antenna the weaker the signal it can receive. Since signals deteriorate as distance between transmitter and receiver increases, the farthest ends require the longest antennae. Therefore, to send a signal to the edge of the visible universe would require a transmission antenna that is almost infinitely tall and at the receiving end of this signal likewise a receiving antenna that is also infinitely tall. Both antennae are physically impossible to construct. Unfortunately, it is by the same technology that scientists hope to detect the echoes of gravity waves. Current best technology is known as the phase interferometric arrays with a baseline distance of 196 millions miles or approximately 315 millions kilometers equivalent to the distance between opposite ends of earth’s orbit around the sun.