Satellites are communications systems that use transponders, receivers and radio signals to communicate with astronauts and scientists on earth. Long before satellites enter orbit, they must be designed to withstand the pressures of atmospheric forces and have all the equipment they need to produce and relay vital information, including photographs, temperatures and weather conditions.Know More
Satellites come in all sizes, ranging from small table-sized objects to massive pieces of equipment large enough to hold humans and act as mobile space stations. Some are manually operated, while others are controlled remotely. Regardless of size and function, all satellites have integrated responders, which are components that receive and transmit radio signals. Because they must travel into atmospheric zones with high levels of pressure and external forces, the satellites must be lightweight but sturdy. In space, they are subject to radiation and high temperatures; most are made of reinforced steel and aluminum, which provide protection from those forces without adding weight. Inside, satellites have communications systems, which consist of antennas, a power system and rockets as well as the transponders that transmit and receive signals. Most satellites also have thrusters, which act as turbo kits, making it possible for satellites to propel themselves through space.Learn more in Television & Video
The Roku player is a miniature audio device that connects to a wireless home network or router via an Ethernet cord to stream movies, TV shows and music to a paired television. Once connected, the device links with the user’s Roku account to access media files through the Roku Store or other providers, such as Netflix.Full Answer >
The way that a television works is different depending on the type of television being used. There are three major existing technologies for televisions are cathode ray tubes, plasma televisions and liquid crystal displays (LCD). Each type of television operates drastically differently from the next.
A two-way splitter receives a signal through its input end, then splits the signal through two outputs on the other side. It is used to split a cable connection between two different television sets.Full Answer >
Digital television uses a digital signal that is sent from a digital channel. This signal is condensed into a single program or multiple subchannels to allow for multibroadcasting of different programs. Digital television allows broadcasters to show their programs on three different resolution rates, which are 480, 720 and 1080, at 60 frames per second.Full Answer >