Patent ID: 6785907
Filing Date: 2004-08-31
Classification: H04N

Abstract:
A feed amplifier signal equalization circuit for use with a plurality of feed amplifiers for two-way coaxial cable system having a distribution center distributing feed signals, a plurality of coaxial cable lines extending therefrom, and a plurality of tap ports connecting the feed signals from the plurality of coaxial cable lines to a plurality of terminals, the two-way coaxial cable system having reception facilities for receiving return signals from the two-way coaxial cable system, the feel signals and the return signals passing along the two-way coaxial cable system in opposite directions being progressively attenuated in signal strength, said two-way coaxial cable system having the plurality of feed amplifiers at spaced intervals therealong, for receiving the feed signals passing along the plurality of coaxial cable lines, and amplifying the same, the feed amplifier signal equalization circuit comprising:a signal equalization circuit, said signal equalization circuit being connectable in one of the plurality of feed amplifiers for equalizing the signal strength of signals being across a wave band of the feed signals and having receptacles for receiving plug in circuit components for varying the characteristics of said signal equalization circuit; a plurality of plug in attenuator components for said signal equalization circuit, each of said plurality of plug in attenuator components being of identical design, said plurality of plug in attenuator components being adapted to interfit with said signal equalization circuit interchangeably, and said plurality of plug in attenuator components having a range of varying performance characteristics whereby a respective plug in attenuator component of said plurality of plug in attenuator components can be selected and plugged into said signal equalization circuit to produce a performance specification desired for a first feed amplifier of the plurality of feed amplifiers at a predetermined location along the two-way coaxial cable system; a return amplifier, said return amplifier being adapted to be connected to the two-way coaxial cable system around said first feed amplifier, whereby the feed signals can pass through said first feed amplifier in a feed direction, and the return signals can pass through said return amplifier around said first feed amplifier in a return direction, and wherein said return amplifier incorporates a return signal equalizer circuit, said return signal equalizer circuit adapted to receive one of a plurality of plug in attenuator components having characteristics which are predetermined, whereby said characteristics of said return amplifier can be adjusted by interchanging said plurality of plug in attenuator components in said return signal equalizer circuit, and wherein said return signal equalizer circuit incorporates PAD circuit receptacles being adapted to receive one of said plurality of plug-in attenuator components, and wherein said plug-in attenuator components for said feed signal equalization circuit, and for a return amplifier circuit are all of identical design, and are interchangeable between said feed signal equalization circuit and said return amplifier circuit and wherein said feed signal equalization circuit further comprises a PAD circuit receptacle, said PAD circuit receptacle having a first connection, a second connection, and a third connection, said first connection being connected to receive the feed signals, and to a capacitor and an inductance, said second connection being connected to a transformer resistor, and said third connection being connected to ground through a capacitor, an inductance, and to approximately a mid-point of a transformer.