Abstract: An upstream ingress filter (300) for isolating upstream ingress noise on a bi-directional cable system having an upstream band and a downstream band for carrying upstream signals and downstream signals, respectively. The upstream ingress filter (300) includes a DC switching element (310) for changing the DC voltage on the cable system at said cable access unit and a switchable notch filter (340) that switches ON and OFF in response to the DC switching element. The notch filter isolates upstream ingress noise by attenuating upstream signals in the upstream band when the upstream ingress filter is ON. Both the DC switching element (310) and the notch filter (340) are connected in parallel to the cable (301).

Abstract: An upstream ingress filter (300) for isolating upstream ingress noise on a bi-directional cable system having an upstream band and a downstream band for carrying upstream signals and downstream signals, respectively. The upstream ingress filter (300) includes a DC switching element (310) for changing the DC voltage on the cable system at said cable access unit and a switchable notch filter (340) that switches ON and OFF in response to the DC switching element. The notch filter isolates upstream ingress noise by attenuating upstream signals in the upstream band when the upstream ingress filter is ON. Both the DC switching element (310) and the notch filter (340) are connected in parallel to the cable (301).

Abstract: A microprocessor controlled automotive audio system with radio, cassette tape, and/or compact disk media has a rear seat control with headphones allowing rear passengers to turn off the rear speakers, turn on the headphones and select any media, while the front speakers play programs selected by a front control. Rear control of media programming is also permitted if the selected media is not under front control. Rear control signals the desired function to the microprocessor which executes the commands subject to front control dominance. An audio processor couples the front-selected program to front and rear outputs and to front speakers. An audio multiplexer connects any media as well as the rear output to the rear control where a speaker/headphone switch connects the multiplexer to the rear speaker or the headphone.

Abstract: A machine used to populate printed circuit boards (PCB) with surface mount electrical components, wherein an elongated PCB-carrying Y table intersects an elongated turret-carrying X oriented carriage structure intermediate a Y table component placement zone. Left and right vacuum quill-carrying turrets are independently movable along the carriage structure, the quills being movable in a Z direction, and the quills in each respective turret being adapted to pick-up selected components from respective left and right multiple feeder stations while the quills in the other turret simultaneously deposits components on a PCB supported on the Y table in the placement zone.

Abstract: A method of demulsifying a water in oil emulsion by contacting the emulsion with an alkyd resin in which one component of the resin is the residue of a polyalkylene glycol.