Microwave communications are used for short-range communications, while satellite communications can be established over long distances. Microwave communications are ideal for television and radio broadcasts, while satellite communications are used for communicating to ships and aircrafts, relaying telephone calls and providing communications to remote areas.Know More
Microwaves can be focused and received via aerial antennas. Microwave signal range does not extend far beyond the visible horizon. Receivers are commonly placed on top of high buildings or hilltops and mountain peaks because the higher the receiver is, the farther the signal can be broadcast. The United States has been spanned by a network of microwave relay stations since the 1960s.
Satellite communication transfers signal via satellite and, depending on the type of system used, can reach all areas of Earth. They do not require installed fixed assets, ground infrastructure or specifically located ground stations. They are used for providing satellite telecommunication, links to direct broadcasting, satellite phone service and individual satellite communication links.
Microwave and satellite communications work together through passive and active satellites. Passive satellites are plastic balloons with a metal coating that reflect microwave signals coming from one part of the Earth to another. Active satellites amplify the microwave signals received.Learn more about Audio Equipment
Digital data refers to information stored as zeros and ones, while analog data refers to other storage methods. While digital data has largely supplanted analog data, some prefer analog storage techniques. Many analog records have been replaced by digital storage.Full Answer >
The difference between analog and digital signals is that an analog signal is a continuous electrical message while digital is a series of values that represent information. Analog is conveyed by electrical current variations. Digital signals are relayed as a series of values that a device can read, such as a digital television.Full Answer >
Ferrite cores, also called beads or chokes, are used around the cables in audio or video equipment to shield them from electromagnetic interference. Simple cylindrical components, ferrite cores prevent interference both from and to a device.Full Answer >
The best resistance choice for subwoofers depends on the amplifier being used to power the system, the amount of voice coils and their specified impedance, as well as whether a parallel or series wiring configuration is being used. Most systems can be wired using either two or four ohms.Full Answer >