ua SYSTEMS CONCEPTS 520 THIRD STREET SAN FRANCISCO, CALIFORNIA 94107 DIGITAL SYNTHESIZER PRELIMINARY ENGINEERING DRAWINGS VOLUME 1 Proprietary Information The drawings and specifications herein are property of Systems Concepts, Inc., and shall not be reproduced or copied or used in whole or in part for the manufacture or sale of products, without prior written permission. TELEPHONE: 415-442 1500 TWX: 910 372-6062 Exh. SC2