Exam 3: Data Transmission

The ratio of the power in a signal to the power contained in the noise that is present at a particular point in the transmission is the ________ ratio.

A digital signal is one in which the signal intensity maintains a constant level for some period of time and then abruptly changes to another constant level.

A key parameter that characterizes any electromagnetic signal is ________,which is the width of the range of frequencies that comprises the signal.

An analog signal can be transmitted only a limited distance before attenuation,noise,and other impairments endanger the integrity of the data.

A(n)________ signal is a sequence of voltage pulses that may be transmitted over a wire medium.

The frequency is the rate at which the signal repeats.

In full-duplex operation both stations may transmit,but only one at a time.

________ is generated by terminals.computers,and other data processing equipment and then converted into digital voltage pulses for transmissions.

The ________ bandwidth is the band where most of the signal energy is concentrated.

The ________ is the maximum value or strength of the signal over time; typically this value is measured in volts.

A technique known as ________ is used to provide a flicker free image without increasing the bandwidth requirement.

A(n)________ signal is a continuously varying electromagnetic wave that may be propagated over a variety of media,depending on spectrum.Examples are wire media and fiber optic cable.

For any given medium,the greater the bandwidth transmitted,the greater the cost.

A means of transmitting analog signals without regard to their content is ________ transmission.

The rate in bits per second at which data can be communicated is the ________.

In ________ transmission signals are transmitted in only one direction; one station is the transmitter and the other is the receiver.

To achieve greater distances in digital transmissions ________ are used.

A guided transmission medium is ________ if it provides a direct link between two devices and those are the only two devices sharing the medium.

The ________ bandwidth of a signal is the width of the spectrum.

In a ________ guided configuration more than two devices share the same medium.