Dismiss
InnovationQ will be updated on Sunday, Oct. 22, from 10am ET - noon. You may experience brief service interruptions during that time.
Browse Prior Art Database

AUTOMATIC MICROWAVE LOOPSWITCH DETECTION METHOD FOR SIMULCAST COMMUNICATIONS SYSTEM

IP.com Disclosure Number: IPCOM000005964D
Original Publication Date: 1990-Oct-01
Included in the Prior Art Database: 2001-Nov-20
Document File: 2 page(s) / 76K

Publishing Venue

Motorola

Related People

Andrew Davis: AUTHOR [+3]

Abstract

Simulcast systems which operate on loop microwave backbones require a high degree of manual diagnostic inter- pretation to determine which path in the loop failed. Once the failed path is known new simulcast equalization adjustments can be implemented for system optimization. Since no automatic detection method exists, automatic simulcast adjustments cannot be made. Manual intervention is required to map the microwave loop failure to new equalization adjustments through a remote control mechanism like Motorola's simulcast PON. The method described provides automatic failure detection and corresponding automatic simulcast equalization adjustments procedures.

This text was extracted from a PDF file.
At least one non-text object (such as an image or picture) has been suppressed.
This is the abbreviated version, containing approximately 58% of the total text.

Page 1 of 2

MO7VROLA Technical Developments Volume 11 October 1990

AUTOMATIC MICROWAVE LOOPSWITCH DETECTION METHOD FOR SIMULCAST COMMUNICATIONS SYSTEM

by Andrew Davis, Robert Novorita, and Christopher Wilson

   Simulcast systems which operate on loop microwave backbones require a high degree of manual diagnostic inter- pretation to determine which path in the loop failed. Once the failed path is known new simulcast equalization adjustments can be implemented for system optimization. Since no automatic detection method exists, automatic simulcast adjustments cannot be made. Manual intervention is required to map the microwave loop failure to new equalization adjustments through a remote control mechanism like Motorola's simulcast PON. The method described provides automatic failure detection and corresponding automatic simulcast equalization adjustments procedures.

   The microwave system loop master controller sends a pilot tone from the prime site around the loop in both direc- tions and detects the returning pilots at the prime site for loop continuity. The lwp master sends baseband information in only one direction from prime to remote sites.

   The remote site loop pilot detectors are configured to sense loop pilot circulating only in the wunterclcckwise direction (refer figure-l). Loss of pilot detection at the remote sites indicates a break in the path between the master and remote site in the counter-clockwise direction. The remde pilot detector output state is routed back to...