Accession Number : ADD003740

Title :   Filtered Transition Distortion Channel Quality Monitor.

Descriptive Note : Patent,

Corporate Author : DEPARTMENT OF THE NAVY WASHINGTON D C

Personal Author(s) : McManamon,Peter Michael

Report Date : 01 Feb 1977

Pagination or Media Count : 8

Abstract : A system for measurement of teletype or other communication channel quality wherein the bit signal element duration is divided into m subintervals. A plurality of transition counters are provided such that each transition counter counts the number of DC transitions occurring during a different set of said subintervals. The counts are then summed for a predetermined plurality of bits. The monitoring device of the present invention is then calibrated by comparing the sums from each of the plurality of transition counters with a known error reference. The most accurate transition counter is thereby determined and is subsequently used for online distortion monitoring. (Author)

Descriptors :   *Patents, *Communication equipment, *Noise analyzers, *Distortion, Transitions, Monitors

Subject Categories : Non-radio Communications

Distribution Statement : APPROVED FOR PUBLIC RELEASE