Accession Number : AD0758686

Title :   A Sample and Hold Technique for Automatic Frequency Control in Binary Data Transmission Systems.

Descriptive Note : Master's thesis,

Corporate Author : NAVAL POSTGRADUATE SCHOOL MONTEREY CALIF

Personal Author(s) : Trisano,Erasmo Zorrilla

Report Date : DEC 1972

Pagination or Media Count : 38

Abstract : A method of driving a voltage for automatic frequency control of a radioteletype receiver-converter is developed and tested. By sampling and holding the amplitude of the Mark and Space signals out of an FSK detector, comparing and integrating their difference, an error correcting voltage results which is less sensitive to noise and selective fading than the AFC voltage derived in the usual way. A sample-and-hold circuit is described. Comparative performance tests, with data in the form of strip-chart recordings, confirms the claims made for the technique. (Author)

Descriptors :   (*DATA TRANSMISSION SYSTEMS, *AUTOMATIC FREQUENCY CONTROL), TELETYPE SYSTEMS, FREQUENCY SHIFT KEYERS, NOISE, RADIOFREQUENCY INTERFERENCE, COMPARATORS, PULSE COMMUNICATIONS, THESES

Subject Categories : Cybernetics
      Non-radio Communications

Distribution Statement : APPROVED FOR PUBLIC RELEASE