Browse Prior Art Database

EE-PROM MEMORY IN SYNTHESIZER/PLL TO STORE DEVIATION INFORMATION

IP.com Disclosure Number: IPCOM000005805D
Original Publication Date: 1989-Aug-01
Included in the Prior Art Database: 2001-Nov-08
Document File: 1 page(s) / 48K

Publishing Venue

Motorola

Related People

Authors:
Steve Einbinder

Abstract

In our present SABER radio the modulation deviation of the synthesizer is set through two digital attenuators. The method in which these attenuators are programmed is very inefficient. Each channel in the radio has adigital word associated with that frequency setting. The deviation must be measured and tuned for each channel then programmed into the EE-Prom. This is a tremendously time consuming process. We do have some improvement in our factory by having certain deviation forecast algorithms but these still require that several deviation measurements be made on each radio. This data is saved with the particular radio and synthesizer and then used to calculate the attentuator settings for any given channel. These algorithms do not help in the field where there are no BIG-FOOT autotest systems. This process must be performed on every radio or every time a syn- thesizer is replaced.