In use since the late 1960's, it is a popular choice for airline tickets, photo developing envelopes and internal warehouse systems.
Bar code scanners are manufactured to read the imprinted bar code where as mark sensors are designed to read mechanically or manually read items passed by their scanners. They can be fixed at any location.
It makes the most sense to think of bandwidth in terms of a rive Bluetooth wireless technology uses adaptive frequency hopping as its form of the maximum possible rate of data transfer under optimal conditions access point to transfer information to one another, as well as receive internet signal.
A polynomial code can detect any error burst of length less than or equal to. Usually the actual serial binary data to be transmitted over the cable are not channel is the theoretical maximum information transfer rate of the channel.
Transmission errors increase and S/N ratio decreases. As the 'true' signal power decreases the receiver has greater difficulty separating it from 'false' signal elements (i.e., noise and distortion) and thus makes more interpretation errors.
An amplifier increases the power of whatever is present at its input. A repeater listens to its input, interprets its data content, and generates a new outgoing signal of equivalent data content. Amplifiers are simpler but amplify noise and distortion in their input signal. Repeaters are more complex, but generate a 'clean' output signal.
12. What are the advantages of wireless transmission using RF waves as compared to infrared waves
Wireless transmission allows the information to transfer without any cable or wire. It boost up the speed of information to be transferred.
13. Describe the relationship between Type I and Type II errors
Type I (): reject the null-hypothesis when the null-hypothesis is true, and
Type II (): fail to reject the null-h