|
Because the satellite signal weakens after traveling through space, it is collected by a parabolic receiving dish, which
then reflects the weak signal to the dish's focal point (eye) and is received,
then down-converted to a lower frequency band and amplified by a device called a low-noise block down converter, or LNB.
Different forms of satellite antenna, which does not use a directed parabolic dish and can be used on a mobile platform such as a vehicle
(car satellite system), was recently announced by the University of Waterloo.
The satellite TV signal, now being amplified, travels to a satellite TV receiver box through
a coaxial cable (RG-6 or RG-10), instead of the standard "RG-59" and is converted by a local oscillator to the L-band range of frequencies. Special on-board electronics in the receiver box help tune the signal and then converts it to a frequency that a standard television can use.
|
