Modulation to Satellite
Use the links below to navigate to the term you are searching for:
Modulation to Satellite
Modulation - The process of manipulating the frequency or amplitude of a carrier in relation to an incoming video, voice or data signal.
Modulator - A component in satellite transponders that modulates the signal so it can be read.
Multicast - A subset of broadcast that extends concept of "broadcasting" by allowing the sending of one transmission to many users in a defined group, but not necessarily to all users in that group.
Noise - Any unwanted and unmodulated energy that is always present to some extent within any signal.
Noise Figure (NF) - A term which is a figure of merit of a device, which compares the device with a theoretical "perfect" device.
Orbital Period - The time that it takes a satellite to complete one circumnavigation of its orbit.
Outage - A malfunction of the communications system that prevents the user from receiving satellite service.
Parabolic Antenna - A satellite antenna in the shape of the dish described mathematically as a parabola. The parabolic shape focuses the weak microwave signal hitting the surface of the dish into a single focal point in front of the dish.
Polar Orbit - An orbit parallel to polar axis of the earth
Protocol - Any set of standard procedures that permit devices to communicate with each other.
Radio Frequency Interference - A term used to denote apparent disturbance or distortion to satellite signals. Abbreviated RFI
Rain Outage - Loss of signal due to absorption and increased sky-noise temperature caused by heavy rainfall.
Receiver - An electronic device which enables a particular satellite signal to be separated from all others being received by an earth station, and converts the signal format into a format for video, voice or data.
Receiver Sensitivity - Measure of power needed by the detector to achieve a specific baseband performance, such as a specified bit error rate or S/N ratio.
RFI - See Radio Frequency Interference.
Router - A device that forwards digital packets of information from one network to another.
Satellite - A sophisticated electronic communications relay station that transmits signals from a point on earth back to a larger area on earth. Satellites orbit 22,237 miles above the equator, moving in a fixed orbit at the same speed and direction of the earth (about 7,000 mph east to west).
See Scrambler to Wavelength
