Abstract: The present invention is an electronic circuit that reduces crosstalk in communications systems employing twisted pair, Ethernet, polyphase or shielded wire transmission media. The present invention includes three stages of crosstalk noise reduction. Stage 1 filters common mode noise from the transmission media and balances the resistive and reactive parasitic electrical characteristics of the transmission media that couple each line to the local ground over the operating frequency band. The second Stage performs differential crosstalk noise reduction in real time using multiple feedback loops. It can dynamically locate and set optimal system operating conditions for minimal differential crosstalk coupling for the specific environmental and interfering channel utilization conditions. The third Stage utilizes digital signal processing techniques to further reduce any residual crosstalk after analog-to-digital conversion.

Abstract: A shaped article is disclosed. The article includes a polymer composition that includes an olefinic polymer; a polar polymer; and a third polymer. The third polymer is a graft or block copolymer having first and second polymer portions. The first polymer portion is compatible with the olefinic polymer and the second polymer portion is compatible with the polar polymer. The polymer composition has a limiting oxygen index of at least about 25.

Abstract: A method of cleaning a power cable having a semi-conductive layer includes wiping the semi-conductive layer with a cleaning solution comprising a brominated hydrocarbon selected from the group consisting of n-propyl bromide and isopropyl bromide to remove at least a portion of the semi-conductive layer.

Abstract: A cleaning solution including a brominated hydrocarbon and an ester. The cleaning solution is especially useful for cleaning high-voltage power cables prior to splicing.

Abstract: A method and apparatus are disclosed for regulating the operation of a TWT. The TWT regulation is achieved by detecting the operating condition of the TWT, e.g., by measuring dynamic gain, and regulating feedback of the TWT output in response to the TWT operating condition. The invention is preferably implemented so as to augment the TWT input drive from an exciter source to induce the TWT to drive itself into saturation. The inventive technique comprises determining whether the TWT is operating in a desired operating condition, e.g., saturation, feeding back to the TWT input a portion of the TWT output power to the TWT input, and regulating the feedback signal to keep the TWT operating in the desired condition. Determination of whether the TWT is operating in a saturation condition may be affected through measurement of the TWT dynamic gain. The invention permits dynamic management of the feedback to accommodate variations in gain of the TWT, e.g.