Analog
and Digital
-Analog signal intensity (voltage or amplitude)
varies and is broadcast (occurs) continuously.
Examples are audio, video, voice and light.
-You turn it on, ramps up like a lightbulb, when the power is cut, it powers down and the signal ramps down.
-You turn it on, ramps up like a lightbulb, when the power is cut, it powers down and the signal ramps down.
-How do you get a negative voltage with a
battery? Turn it around ;)
-LED cannot use a backward battery. The way they are built, it only conducts in
one direction, so if the flow is reversed, it is blocked, sometimes
catastrophically.
-The flow of energy in a battery is out the negative
side (gtfo!) and in the positive.
-DC (direct current) Resistance causes electrons to
lose their energy over time.
-AC The highest points are called peaks, the lowest
is also called a peak. P-P (peak to
peak) voltage is calculated by the distance between the two.
-Digital signal consists of discrete or separate
pulses. It has numerous starts and stops
throughout the signal stream, for example; Morse code. Computers operate using digital signals. The analog signal must be converted into a
digital format before it can be stored and processed or interpreted by a
computer.
-A Modem (modulator/DEModulator) is a piece of
equipment that converts the distinct digital signals from a computer and
encodes them into a continuous analog signal for transmission over analog phone
lines. Modulation is the process of
encoding the digital signals (bits) onto an analog wave.
More After the Break
More After the Break
