NCJ Number
30607
Date Published
1975
Length
30 pages
Annotation
THE PURPOSE OF THIS DOCUMENT IS TO ESTABLISH PERFORMANCE REQUIREMENTS AND METHODS OF TEST FOR FREQUENCY MODULATED PERSONAL/PORTABLE RECEIVERS USED BY LAW ENFORCEMENT AGENCIES.
Abstract
PERSONAL/PORTABLE FM RECEIVERS IS A LAW ENFORCEMENT EQUIPMENT STANDARD DEVELOPED BY THE LAW ENFORCEMENT STANDARDS LABORATORY. THIS STANDARD APPLIES TO VOICEMODULATED, NON-MULTIPLEX RECEIVERS WHICH EITHER DO NOT HAVE SPECIAL SUBSYSTEMS SUCH AS SELECTIVE SIGNALING OR VOICE PRIVACY, OR IN WHICH SUCH SUBSYSTEMS ARE DISABLED OR BY-PASSED DURING TESTING FOR COMPLIANCE WITH THIS STANDARD. PERSONAL/PORTABLE RECEIVERS WHICH OPERATE IN THE 25-50 MHZ, 150-174 MHZ AND 400-512 MHZ BANDS ARE COVERED. THE PRINCIPAL TERMS AND DEFINITIONS USED IN THE STANDARD ARE DEFINED, AS ARE THE MOST CRITICAL ITEMS OF TEST EQUIPMENT NEEDED TO MAKE THE REQUIRED MEASUREMENTS. THE STANDARD LISTS PERFORMANCE REQUIREMENTS AND TEST METHODS FOR 17 DIFFERENT ATTRIBUTES, SUCH AS SINAD SENSITIVITY, INTERMODULATION ATTENUATION, AUDIO DISTORTION AND AUDIOFREQUENCY RESPONSE. IT IS INTENDED FOR USE BY LAW ENFORCEMENT AGENCIES IN THEIR SELECTION AND PROCUREMENT OF PERSONAL/PORTABLE RECEIVERS. (SNI ABSTRACT