Thesis

Modifications to computer systems controlling the use of the electromagnetic spectrum

The Frequency Management Division at the Pacific Missile Test Center is responsible for controlling the military use of the electromagnetic spectrum in Southern California. This is accomplished in two ways: (1) Scheduling the usage of the spectrum to prevent interference between various users. (2) Monitoring the usage of the spectrum to insure that the scheduling is strictly adhered to. The Frequency Management Division has two Hewlett-Packard minicomputer-controlled systems that assist the division in performing its responsibilities. The Electromagnetic Interference Test System (EMITS) is an automatic monitoring system that is able to scan the spectrum and determine the extent of its usage. The Frequency Allocation Display System (FADS) provides a current schedule of the usage of the spectrum in Southern California. This graduate project, divided into three subprojects, is concerned with making improvements to these computer-controlled systems. In the first subproject, existing computer graphics routines were modified and new routines for EMITS were designed. The second subproject involved modifying the interfacing subroutines between the EMITS hardware and the controlling computer. The third subproject involved designing an edit logging and recovery system for FADS.

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