Accession Number:

AD0262011

Title:

TEST AND EVALUATION OF A DIGITAL CLOCK FOR REAL-TIME COMPUTER OPERATION

Descriptive Note:

Corporate Author:

NATIONAL AVIATION FACILITIES EXPERIMENTAL CENTER ATLANTIC CITY N J

Personal Author(s):

Report Date:

1961-04-01

Pagination or Media Count:

1.0

Abstract:

Tests and evaluations were performed utilizing a Remington Rand UNIVAC digital clock with the UNIVAC file computer system. The purpose of the clock is to provide a stable timing signal necessary to a computer program, which requires referencing to real time. Programs of this nature, would be automatic readouts of flight plan data based on real time, originating messages for transmittal to other facilities, and the erasing or recording of data based on real time. Incorporation of the digital clock will reduce the amount of interintra-facility coordination. Results indicated that the digital clock is applicable to the system in performing the functions intended. During the initial test, invalid data could be contained in the clock register and would not be detected until the next attempt to access the clock register. This required engineering changes to the clock circuitry which were made by connecting the clock error to the main computer error circuitry. These changes provided immediate detection of invalid data in the clock register and allowed the normal error system to function as programmed. The final results indicated that, the digital clock performed most reliably and satisfactorily for the Phase I UNIVAC file computer system. Author

Subject Categories:

Distribution Statement:

APPROVED FOR PUBLIC RELEASE