What is the difference between Analog and Digital?
I take it you need this for GCSE Physics =) Well here is everything you will need to know : Analogue: These have a value between +1 and-1 and are send via a transverse wave. This form of a signal can be interfered with by diffraction and it is hard to regain the orignal signal to its full quality. This is what he two wave signals look like: http://www.webbasedprogramming.com/Trick… Analogue is the top one and Digital is the bottom Digital: These have a value of 1 or 0 ( they use binary) and have a simple signal style (use above link). If interfered with you can easily regain the signal and the information. Digital signals also use MULTIPLEXING (Need to know this) which means you can layer more than one signal down the same line. So you can have say 5 telephone calls layer upon one another down one line opposed to one telephone call with a analogue signal.
Analog cellular is the oldest technology used for cellular calls. It uses a band of frequencies around 800MHz. Analog transmits calls over continuously variable radio waves, similar to FM radio. Analog service is available in 90 to 95% of North America. Call quality is fair to good. Occasionally callers will experience “fast busy” signals if the network is too busy to handle the volume of calls, some static, or even dropped calls. Analog provides limited data services. Digital cellular network standards are CDMA (code division multiple access), TDMA (time division multiple access), and GSM (global system for mobile communications), which use a band of frequencies around 800 & 1900 MHz. Voices are converted to digital 1’s and 0’s for transmission, then converted back to voices at the receiving end. Digital coverage is increasing across Canada and will eventually equal analog coverage. Call quality is improved over analog with less static. The network is able to increase the capacity wit
The key difference between analog and digital technologies is that analog technologies record waveforms as they are, while digital technologies convert analog waveforms into sets of numbers, recording the numbers instead. When played back, the numbers are converted into a voltage stream that approximates the original analog wave. Analog technology brought us Chuck Berry, Elvis, and The Beatles on vinyl records, 8-tracks, and cassettes. Using today’s digital devices, original studio analog recordings can be cleaned up, re-mastered, and distributed as digital files that sound better than those long playing records (LPs) ever did. While analog tapes and LPs wear out with use, a digital recording sounds exactly the same no matter how many times it’s played. It’s also easily copied and moved between storage devices. It might seem counter-intuitive that a technology that converts an analog waveform to numbers would sound better than one that records the waveform as it is, but digital technol
