Browse Prior Art Database

SIMPLIFIED SIP BUS WARP CONTROL FOR OPTIONAL HIGH STABILITY OVENIZED OSCILLATOR

IP.com Disclosure Number: IPCOM000007433D
Original Publication Date: 1995-Jul-01
Included in the Prior Art Database: 2002-Mar-26
Document File: 1 page(s) / 65K

Publishing Venue

Motorola

Related People

James Gehrke: AUTHOR

Abstract

Modern wireless communication network base stations must operate over many bands, and systems with different channelization requiring different fre- quency stability options. The problem with compat- ibility ofa single base station design with large num- ber of stability requirements is a way must be found to provide optional high stability with minimal cost and component penalty to the standard product. The proposed frequency stability standard for the FCC part 88 re-mining of the VHF and UHF bands is an example of how the increased need for spectrum efftciency has generated a major need for a low cost optional way to obtain better than 0.5 PPM frequency stability references for these services.

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Mm-LA Technical Developments

8

SIMPLIFIED SIP BUS WARP CONTROL FOR OPTIONAL HIGH STABILITY OVENIZED OSCILLATOR

by James Gehrke

BACKGROUND:

PRINCIPLE OF OPERATION:

  Modern wireless communication network base stations must operate over many bands, and systems with different channelization requiring different fre- quency stability options. The problem with compat- ibility ofa single base station design with large num- ber of stability requirements is a way must be found to provide optional high stability with minimal cost and component penalty to the standard product. The proposed frequency stability standard for the FCC part 88 re-mining of the VHF and UHF bands is an example of how the increased need for spectrum efftciency has generated a major need for a low cost optional way to obtain better than 0.5 PPM frequency stability references for these services.

  In addition to meet this higher stability optional requirement at the lowest possible cost delta the design approach must recognize the manufacturing need to design the PC board to provide a simple means to field retrofit for the high stability option. The best way to do that is to design for the upgrade to simply insert the expensive ovenized oscillator into a PC board socket and software configured.

VFI

  The use of a standard frequency reference design based on the Motorola Pendulum TCXO can lead to a low cost interface for a high stability miniature ovenized oscillator. The problem with the use of an optional...