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Feedhorn and LNB
The feedhorn is a device that collects the signals at
the focus of the satellite dish and channels them to the
LNB (Low Noise Block Down Converter). The LNB amplifies
the received signals (3.6 - 4.2 GHz for C-band or 12.25
- 12.75 GHz for Ku-band) and converts them to lower frequency
in the range between 950 and 2150 MHz, and are then sent
down a cable to the satellite receiver.
To receive both C-band and Ku-band signals, you need a
dual band feedhorn with both C-band and Ku-band LNBs.
If you want to receive programmes from both vertical
and horizontal polarisations, you will need a feedhorn
providing outputs for both polarisation. Furthermore,
by installing a dual-band and dual-pol feedhorn, you can
receive signals from both C and Ku bands and each band
having signals from both vertical and horizontal polarisations
simultaneously.
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