Browse Prior Art Database

WIDE AREA COMMUNITY REPEATER SYSTEMS

IP.com Disclosure Number: IPCOM000007365D
Original Publication Date: 1995-Mar-01
Included in the Prior Art Database: 2002-Mar-19
Document File: 1 page(s) / 48K

Publishing Venue

Motorola

Related People

Doug Eaton: AUTHOR [+2]

Abstract

This paper describes a system which combines both multiple receivers and a community repeater in a receiver voting configuration to provide both wide area talk-in coverage and the multiple user group privacy.

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@ MO-LA

Technical Developments Volume 24 March 1995

WIDE AREA COMMUNITY REPEATER SYSTEMS

by Doug Eaton and Ron Hansen

  This paper describes a system which combines both multiple receivers and a community repeater in a receiver voting configuration to provide both wide area talk-in coverage and the multiple user group privacy.

  Community Repeaters have been used for many years as an inexpensive system for multiple PL/DPL user groups needing a limited degree of inter-group privacy Unfortunately, when portables are introduced into these systems, they suffer from the limited talk in range provided by only one receiver.

  An MSF-5000 Repeater, MSF-5000 Voting Receivers and a Spectra-TAC Comparator are used to implement this system. The repeater and receiv- ers are modified to encode and decode a unique Tone Remote Control scheme which allows the decoded PL/DPL user ID to be passed through the modified

comparator to key the station with PL/DPL tone and set all receivers to only decode the PL/DPL tone ofthe receiver initially voted.

  When the transmission ends the station remains on the last channel that was keyed. This would allow a console interfaced to the comparitor to answer back the last user without knowing what user group they were associated with as well as being able to initiate calls to any user group.

CONCLUSION

  This system would allow Motorola to offer a cost effective Wide Area Community Repeater System utilizing existing products with very little Engineer- ing...