Also referred to as quota control, it is a method of selecting subjects for a study. The subjects are already chosen for specific characteristics such as age, sex, education, etc.The quota sampling assures the proper proportion of these traits in the group.lso referred to as quota control, it is a method of selecting subjects for a study. The subjects are already chosen for specific characteristics such as age, sex, education, etc.
In contrast, a broadband signal is a signal which does not occupy the lowest range, but instead a higher range, 1MHz to 3MHz, for example. A wire may have only one baseband signal, but it may hold any number of broadband signals, because they can occur anywhere in the spectrum.
Ham Radio Videos! SSB - What is Single Side band? First we must understand what single side band is not! This article is tailored and written for the new ham. Article written and compiled by N4UJW and updated 01-2014. Single sideband is not a band! It is not a frequency! It is not a portion of a band! It is not a rock group! It is not.......what you may have thought! Single sideband is more properly called a mode like AM or FM. It is a very efficient method of superimposing your voice or other information on a radio wave and the transmission of that radio wave. The method by which audio, (information), is impressed on a radio signal is called modulation.