NCJ Number
15243
Date Published
1974
Length
39 pages
Annotation
THIS TECHNICAL DOCUMENT PRESENTS MINIMUM PERFORMANCE REQUIREMENTS AND TEST METHODS FOR FREQUENCY MODULATED, FIXED AND BASE STATION TRANSMITTERS FOR USE BY LAW ENFORCEMENT AGENCIES.
Abstract
IT WAS DEVELOPED BY THE LAW ENFORCEMENT STANDARDS LABORATORY OF THE DEPARTMENT OF JUSTICE. FOURTEEN PERFORMANCE CHARACTERISTICS GROUPED UNDER THE GENERAL HEADINGS OF RADIO FREQUENCY CARRIER, AUDIO FREQUENCY MODULATION, ELECTROMAGNETIC COMPATIBILITY, AND ENVIRONMENTAL CHARACTERISTICS ARE DEFINED FOR THREE TYPES OF TRANSMITTERS WHICH ARE IDENTIFIED BY THEIR MEGAHERTZ BAND OPERATING FREQUENCIES (400-512, 150-174, AND 25-50). TEST METHODS INVOLVE DETERMINING A VALUE FOR EACH OF THE CITED PERFORMANCE REQUIREMENTS. WHILE THE STANDARD SHOULD BE OF VALUABLE ASSISTANCE IN THE SELECTION AND PROCUREMENT OF FIXED AND BASE STATION TRANSMITTERS, THE NECESSARILY TECHNICAL NATURE OF THE STANDARD AND ITS SPECIAL FOCUS AS A PROCUREMENT AID MAKE IT OF LIMITED USE TO THOSE WHO SEEK GENERAL INFORMATION ON FIXED AND BASE STATION FM TRANSMITTERS. APPENDIXES CONTAIN A BIBLIOGRAPHY AND TABULATED MINIMUM PERFORMANCE DATA FOR ALL THREE TRANSMITTER TYPES. IT IS NOTED THAT THE PERFORMANCE REQUIREMENTS ARE IN AGREEMENT WITH THOSE GIVEN IN THE RULES AND REGULATIONS PUBLISHED BY THE FEDERAL COMMUNICATIONS COMMISSION. (SNI ABSTRACT)