Please list the difference between analog and digital signals?
Analog are raw continuous signals. Digital are artificially reduced signals that can simulate analog by interpolating simplified data. Analog signals are made of waveforms. Digital are made of square-waves, which can be represented as bits. Ricardo, If you’re going to cut-and-paste your answer from Wikipedia, at least cite it as a source.
analog signal A signal in which some feature increases and decreases in the same way as the thing being transmitted. In am radio, for example, the strength of the radio wave goes up and down in analogy with the loudness of the original sound. (Contrast digital signal.)Radio, TV, some telephones, and tape recorders all use analog signals now, but the trend for the future is to send signals in digital form. digital signal A signal in which the original information is converted into a string of bits before being transmitted. A radio signal, for example, will be either on or off. Digital signals can be sent for long distances and suffer less interference than Analog signals. The communications industry worldwide is in the midst of a switch to digital signals.Sound storage in a compact disk is in digital form.
OK well think about what a wave form looks like, a bunch of peaks and valleys. In an anolog signal, the shape of the waves, the amplitude (height of the peaks and valleys) and variations in wave length (distance between peaks) provides the data that is the signal intself. In a digital signal, the wave form is on and off. All the peaks are the same height and on = 1 and off = 0. Remember a digital signal is just a bunch of 0’s and 1’s. This results in a square wave form rather than the smoother peaks and valleys of an analog signal.
Analog signals are in the form of sine waves and frequencies. Example: We humans with our hearing pick up sound waves which are analog sine waves signals all within the audible range of 300 to 3000 Hz frequencies. Higher frequencies require electronic equipment to detect and translate the signal. Digital signals on the other hand are pulse signals of ones and zeros Example: A digital signal is like an on and off switch for turning a light on and off, which is basically what a fiber optic laser performs. In electrical digital signals it is +5 volts and -5 volts that give the on & offs.
Well I would love to answer this for you. Ill keep it brief. Analog recording is know as direct reflection and has no latency because its not converting 1 and 0’s. Digital uses a term called “PCM” pulse code modulation developed by the phone company. In digital the waveform is sampled every second which is basically a snapshot “picture” of the waveform. Depending on how high you set the sample rate it will determine the amount of samples “pictures” taken per sec. Then then the samples which are 1 and 0’s will need to be converted from digital to analog with a A/D converter so you can hear music through speakers.
