NILECJ (NATIONAL INSTITUTE OF LAW ENFORCEMENT AND CRIMINAL JUSTICE) STANDARD FOR FM (FREQUENCY MODULATED REPEATER SYSTEMS - LAW ENFORCEMENT STANDARDS PROGRAM

• NCJ Number: 41975
• Author(s): R M JICKLING; J F SHAFER
• Date Published: 1977
• Length: 16 pages
• Sponsoring Agency: US Dept of Justice; US Dept of Justice NIJ Pub
• Corporate Author: US Dept of Commerce
• Sale Source: Superintendent of Documents, GPO; National Institute of Justice/
• Language: English
• Country: United States of America

Annotation

AN EQUIPMENT STANDARD DEVELOPED BY THE LAW ENFORCEMENT STANDARDS LABORATORY OF THE NATIONAL BUREAU OF STANDARDS, THIS REPORT ESTABLISHES PERFORMANCE REQUIREMENTS AND TEST METHODS FOR FREQUENCY MODULATOR REPEATER SYSTEMS.

Abstract

THE PRINCIPAL TERMS AND DEFINITIONS USED IN THE STANDARD ARE DEFINED, AS ARE THE MOST CRITICAL ITEMS OF TEST EQUIPMENT NEEDED TO PERFORM THE NECESSARY MEASUREMENTS. CHARACTERISTICS MEASURED INCLUDE REPEATER SENSITIVITY, CARRIER OUTPUT POWER, FREQUENCY DEVIATION, MODULATION LIMITING, AND AUDIOFREQUENCY HARMONIC DISTORTION. FOR FIXED REPEATERS, THESE REQUIREMENTS COMPLEMENT THOSE ESTABLISHED BY THE NATIONAL INSTITUTE OF LAW ENFORCEMENT AND CRIMINAL JUSTICE (NILECJ) FIXED AND BASE STATION TRANSMITTER AND RECEIVER STANDARDS. LIKEWISE, FOR MOBILE REPEATERS, THESE REQUIREMENTS COMPLEMENT THOSE ESTABLISHED BY THE NILECJ MOBILE TRANSMITTER AND RECEIVER STANDARDS. THIS STANDARD APPLIES TO REPEATER SYSTEMS WHICH EITHER DO NOT HAVE SPECIAL SUBSYTEMS SUCH AS TONE CODING OR SELECTIVE SIGNALING, OR IN WHICH SUCH SUBSYSTEMS ARE BYPASSED OR DISABLED DURING TESTING FOR COMPLIANCE WITH THIS STANDARD.