NECESSARY BANDWIDTH

For a given class of emission , the width of the frequency band which is just sufficient to ensure the transmission of information at the rate and with the quality required under specified conditions. [ NTIA ] [ RR ] ( 188 ) Note: Emissions useful for the adequate functioning of the receiving equipment, e.g., the emission corresponding to the carrier of reduced carrier systems, must be included in the necessary bandwidth . ( 188 ) ( See Annex J of NTIA Manual of Regulations and Procedures for Federal Radio Frequency Management for formulas used to calculate necessary bandwidth.)