3/21/2023 0 Comments Define bandwidthThese slices are limited with bandpass filters (think spigot). The phone company actually breaks the electromagnetic spectrum into 4-kHz slices. The more information being sent, the more bandwidth is necessary.Ī typical analog telephone line requires 3-kHz to handle voice communications. Bandwidth is the range of frequencies that can be carried across a given transmission channel. OK, How Does This Answer “What is Bandwidth?”īandwidth is similar to this. A larger hose and pipe are needed to get adequate flow to do the job. Even opened up to its fullest, the garden hose can not allow enough volume through it to put out the fire. Now imagine our house fire situation again. The control mechanisms help to avoid waste. If more were allowed to flow through, we may experience flooding or over saturation. What are the purposes of these constraints? To help control the flow of water through the system. You can open or close the spigot to increase or decrease the desired flow. The spigot acts as the final control mechanism. This is usually even smaller in diameter, so flow is restricted even more. It only allows a certain amount to flow through it. This is actually a regulated flow, with a number of control mechanisms.įirst, there is the diameter of the water pipe. Now let’s get back to our garden hose of telecommunications. Even more importantly, they don’t come and hook their hoses up to your outside spigot, do they? No, they use the large pipes connected to the local fire hydrant. You need a large diameter hose such as that used by your local fire department. Your little garden hose won’t be of much help in this instance. If we have a regular garden hose, we should be able to get enough volume of water through it to put the fire out. The larger the pipe, the more information that can be passed through it.Īssume that there is a small campfire. Bandwidth is the pipe or hose of the communications industry. Now apply the same concept to telecommunications. However, did more volume of water actually flow through the pipe? It depends on the size. By constricting a pipe, one can cause water to be expelled very rapidly. The bigger the pipe or hose, the larger the volume of water that you can put through it. That is as a unit of measurement that represents the rate at which data or bits of information may be transmitted through a system. We will use the term as it is most commonly referred to in reference to the internet. For our discussion, we will be speaking of bandwidth in terms of business communication solutions.Įven here the term can be misleading. In optics, it is the width of an individual spectral line or the entire spectral range. When it comes to radio, bandwidth often refers to wavelength. For example, a 3 kHz band can carry a telephone conversation whether that band is at baseband (as in a POTS telephone line) or modulated to some higher frequency.Bandwidth can refer to many things depending on the application being discussed. Baseband bandwidth applies to a low-pass filter or baseband signal the bandwidth is equal to its upper cutoff frequency.īandwidth in hertz is a central concept in many fields, including electronics, information theory, digital communications, radio communications, signal processing, and spectroscopy and is one of the determinants of the capacity of a given communication channel.Ī key characteristic of bandwidth is that any band of a given width can carry the same amount of information, regardless of where that band is located in the frequency spectrum. Passband bandwidth is the difference between the upper and lower cutoff frequencies of, for example, a band-pass filter, a communication channel, or a signal spectrum. It is typically measured in hertz, and depending on context, may specifically refer to passband bandwidth or baseband bandwidth. Bandwidth is the difference between the upper and lower frequencies in a continuous band of frequencies.
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