Accession Number : AD0891462

Title :   Digital Interface Code Converter.

Descriptive Note : Quarterly rept. no. 2, 1 Oct 71-1 Jan 72,

Corporate Author : ELECTRONIC COMMUNICATIONS INC ST PETERSBURG FL RESEARCH AND ADVANCED DEVELOPM ENT LAB

Personal Author(s) : Betts, William L. ; Smith, Richard K.

Report Date : JAN 1972

Pagination or Media Count : 32

Abstract : The purpose of this program is to design, develop, and fabricate one exploratory development model of the code converter. The code converter interfaces two PCM multiplexers which utilize different companding characteristics, bit rates, and synchronization code formats. During this quarter the design of the exploratory development model was completed. The code conversion is accomplished via a 256 x 8 bit programmable read only memory (ROM). A survey of ROM manufacturers was conducted to determine the best ROM for this application. The frame synchronization algorithms were analyzed. The synchronization acquisition time is less than 120 milliseconds; 90% of the time in an environment with a bit error probability of pe = .001.

Descriptors :   *MULTIPLEXING), (*CODING, INTERFACES), (*DIGITAL SYSTEMS, PULSE CODE MODULATION, MEMORY DEVICES, SYNCHRONIZATION(ELECTRONICS), INTEGRATED CIRCUITS, ALGORITHMS, DECODING, LOGIC CIRCUITS, SEMICONDUCTOR DEVICES, COSTS, PHASE LOCKED SYSTEMS.

Subject Categories : Electrical and Electronic Equipment
      Cybernetics

Distribution Statement : APPROVED FOR PUBLIC RELEASE