When was satellite TV introduced?
Satellite television
On occasion, sun outage will occur when the sun lines up directly behind the geostationary satellite to which the receiving antenna is pointed.[12]
The downlink satellite signal, quite weak after traveling the great distance (see inverse-square law), is collected with a parabolic receiving dish, which reflects the weak signal to the dish's focal point.[13] Mounted on brackets at the dish's focal point is a device called a feedhorn or collector.[14] The feedhorn is a section of waveguide with a flared front-end that gathers the signals at or near the focal point and conducts them to a probe or pickup connected to a low-noise block downconverter (LNB).[15] The LNB amplifies the signals and downconverts them to a lower block of intermediate frequencies (IF), usually in the L-band.[15]