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Satellite TV antenna: The 8-Ball—a satellite TV antenna you can build for under $750. H. D. McCullough: 52/8: August 1981 Synthesized RF generator: The Programma-2 covers a range of 300 kHz to 30 MHz and costs about $3100 less than its commercial counterparts. Gary McClellan: 52/8: August 1981 Electronic musical horn: Don't blow your horn in ...
a Multiswitch with 16 outputs, the four cables from the Quattro-LNB enter on the left. A multiswitch is a device used with a dual or quattro LNB to distribute satellite TV signals to multiple (usually more than four) receivers from a single dish and LNB.
Uplink facilities transmit the signal to the satellite over a narrow beam of microwaves, typically in the C-band frequency range due to its resistance to rain fade. [20] Uplink satellite dishes are very large, often as much as 9 to 12 metres (30 to 40 feet) in diameter [ 20 ] to achieve accurate aiming and increased signal strength at the ...
The frequency band initially allocated was 2500–2690 MHz (the "2.6 GHz band") consisting of 22–23 analogue 8 MHz channels; digital TV was restricted to 2524–2668 MHz, consisting of 18 digital 8 MHz channels. Two digital TV standards were used: DVB-T/MPEG-2 in the old Chorus franchise area and DVB-C/MPEG-2 in the old NTL franchise area ...
In an optical fibre system at the LNB the four sub-bands are "stacked" in frequency, one above the other, at 0.95 GHz-3.0 GHz (the whole frequency range received in vertical polarisation) and 3.4 GHz-5.45 GHz (horizontal polarisation) and transmitted together as a modulated optical signal down the fibre cable using a 1310 nm semiconductor laser.
For example, to downconvert the incoming signals from Astra 1KR, which transmits in a frequency block of 10.70–11.70 GHz, to within a standard European receiver's IF tuning range of 950–2,150 MHz, a 9.75 GHz local oscillator frequency is used, producing a block of signals in the band 950–1,950 MHz.
A satellite dish is a dish-shaped type of parabolic antenna designed to receive or transmit information by radio waves to or from a communication satellite. The term most commonly means a dish which receives direct-broadcast satellite television from a direct broadcast satellite in geostationary orbit .
Diplexers are also used in the home to allow a direct broadcast satellite TV dish antenna and a terrestrial TV antenna (local broadcast channels) to share one coaxial cable. The dish antenna occupies the high frequencies (typically 950 to 1450 MHz), and the TV antenna uses lower television channel frequencies (typically 50 to 870 MHz).