Browse Prior Art Database

PC Network to Lower Power Network Adapter

IP.com Disclosure Number: IPCOM000038705D
Original Publication Date: 1987-Feb-01
Included in the Prior Art Database: 2005-Jan-31
Document File: 2 page(s) / 24K

Publishing Venue

IBM

Related People

Cutshaw, R: AUTHOR

Abstract

This article describes a technique for operating a personal computer (PC) network at lower than usual power levels, while avoiding intermodulation distortion characteristically expected for such operation. The latter result is achieved by insertion of filters in reception and transmission paths between each network node adapter and the network cable, to reduce distortion elements from signals transmitted on the cable and remove distortion elements from received signals. When two differing power levels are presented to amplifiers of a PC network, intermodulation and distortion result at other frequencies and possibly at the frequencies where communication is going on.

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PC Network to Lower Power Network Adapter

This article describes a technique for operating a personal computer (PC) network at lower than usual power levels, while avoiding intermodulation distortion characteristically expected for such operation. The latter result is achieved by insertion of filters in reception and transmission paths between each network node adapter and the network cable, to reduce distortion elements from signals transmitted on the cable and remove distortion elements from received signals. When two differing power levels are presented to amplifiers of a PC network, intermodulation and distortion result at other frequencies and possibly at the frequencies where communication is going on. In the technique disclosed herein, an adapter allows the PC network to run on a network whose amplifiers are designed to operate at lower power levels than the PC network operates. The technique of this disclosure is shown in block diagram in the drawing wherein filters are inserted in the reception and transmission paths respectively between each network node adapter and the network cable. The filters are high-pass and low-pass as shown, or both are band-pass of PC network frequencies. An attenuator is inserted in the transmitter filter chain. This technique removes possible intermodulation products from the operation of the PC network on networks that require lower power operations.

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