Broadband reflective phase cancelling network interface device

A network interface device, network technology, applied in the direction of TV, cable transmission adaptation, selective content distribution, etc., can solve the problems of users unable to receive meaningful services, serious degradation levels, and service quality degradation.

Active Publication Date: 2013-05-29
JOHN MEZZALINGUA ASSOC INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Signal reflections that degrade the quality of service experienced by the user, or in some ca

Method used

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  • Broadband reflective phase cancelling network interface device
  • Broadband reflective phase cancelling network interface device
  • Broadband reflective phase cancelling network interface device

Examples

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Embodiment Construction

[0027] figure 1A network interface device 10 is shown, for example a passive-active network interface device employing an embodiment of the present invention. The network interface device 10 includes a housing 12 that encloses active and passive internal electronic circuit components (such as figure 2 and 3 shown). Surrounding the housing 12 is a mounting flange 14 with holes 16 in the flange to secure the network interface device 10 to a support structure at the user's premises 18 . A high frequency downstream signal 19 is provided from a headend (not shown) of a cable network 20, such as a cable television (CATV) network, and is passed to the network interface at an input / output cable port 22 connected to the cable network 20 device10.

[0028] Such as figure 2 As shown, passive and active internal electronic circuit components within housing 12 include conventional signal splitters or directional couplers 24 for communicating CATV downstream signals 19 and upstream ...

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Abstract

The invention refers to a broadband reflective phase cancelling network interface device. The network interface device includes a signal splitter which conducts CATV signals through an active branch circuit, the active branch circuit including an active signal conditioner which modifies characteristics of active branch signals conducted through the active branch circuit, a sensor connected to sense normal, inoperative and abnormally operative conditions, the sensor removing a control signal indicative of inoperative and abnormal operating conditions, a selectable switch connected to the active branch circuit, the selectable switch communicating the CATV signals between the CATV network and the subscriber devices when in an activated position, and the selectable switch passing the signals to a signal reduction path when in a deactivated position, the selectable switch assuming the deactivated position in response to the de-assertion of the control signal, and a phase cancellation circuit connected to the signal reduction path.

Description

[0001] Cross References to Related Applications [0002] This application claims priority to US Provisional Application Serial No. 61 / 559,508, filed November 14, 2011. technical field [0003] The present invention generally relates to the transmission and reception of radio frequency or high frequency signals over a cable network, such as a cable television (CATV) network. More specifically, the present invention relates to a new and improved network interface device, which transmits to user equipment in a manner that automatically maintains a high signal integrity by improving return loss when a terminal adapter fails or is in an abnormal operating state. high frequency signal. Background technique [0004] Cable television (CATV) service operators provide television, data, telephone and other entertainment and useful services to subscribers at the subscriber's premises. [0005] The typical medium for the delivery of these services is a wired network consisting of a re...

Claims

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Application Information

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IPC IPC(8): H04N7/10
CPCH04N7/104H04N21/61H04N7/17309H04N21/6118
Inventor N·蒙特纳S·K·谢菲尔E·阿尔肯
Owner JOHN MEZZALINGUA ASSOC INC
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