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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 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 convertor 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 lnput Mbit/s modulation multiplexed analogue component multiplexing noise figure number of amplifiers off-air optical output possible practical problems programmes pulse radio receiver reflected signal refractive index 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