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.
In terms of bandwidth, baseband is the highest frequency (measured in hertz) used by the bandwidth, or the upper bound of the bandwidth. In terms of a channel, baseband is a type of communication channel that uses frequencies that are very close to zero hertz.Serial cables and local area networks (LANs) use baseband channels.n terms of a channel, baseband is a type of communication channel that uses frequencies that are very close to zero hertz. Serial cables and local area networks (LANs) use baseband channels.