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Cable television a whole range of different systems
The aerial system
The head end
11 other sections not shown
aerial amplitude attenuation automatic gain control band band-pass filter bandwidth broadcasting cable network cable operators cable service cable systems cable television cabled distribution systems carrier carrier-to-noise ratio carry CATV channels coaxial cable component convertors cross-modulation customers D-MAC dBmV Demodulator descrambling diode directional coupler distortion duobinary effect encryption engineers ensure equaliser equipment eye-height fibre fibre-optic filter frequency gain head end input signal insertion installation interactive services intermodulation laser length light Mbit/s modulation monomode multiplexed analogue component multiplexing noise figure number of amplifiers off-air optical output possible practical problems programmes pulse radio receiver reflected signal return loss satellite scrambling signal levels signal-to-noise ratio spectrum standard subscribers switching centre techniques teletext teletext signals television pictures television signals transmission transmitter trunk TVRO two-way typical upstream usually various viewers voltage wavelength