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Chapter 1: General information
Antenna and LNB
Transponders
TV-satellites that can be viewed with Satellite antennas transmit in the Ku frequency
band on frequencies between 10.700 and 12.750 MHz. Each satellite typically has
several transmitters or transponders that carry a number of digital TV and/or radio
channels.
Antenna and LNB
When the signals reach the antenna they are focused by the dish and radiated into
the feedhorn and passed along to the LNB (Low Noise Block converter). The LNB
amplifies the signals and transforms them to a lower frequency within the so-called
satellite IF-band. Satellite receivers use the IF band which covers 950-2150 MHz
(2300 MHz in some areas).
Since the Ku-band covers 2050 MHz and the IF-band only 1200 MHz, it is necessary
to divide the incoming signals into a high band and a low band with separate outputs
on the LNB. Low-band IF-signals are shifted 9750 MHz down and high-band IF-
signals 10600 MHz down.
