Exam 2: Fundamentals of Data and Signals

Quantization error, or ____________________, causes the regenerated analog data to differ from the original analog data.

____________________ shift keying uses two different frequency ranges to represent data values of 0 and 1.

Frequency shift keying is susceptible to sudden noise spikes that can cause loss of data.

The range of frequencies that a signal spans from minimum to maximum is called the ____________________.

ASCII is a data code rarely used in the world.

A device that modulates digital data onto an analog signal and then demodulates the analog signal back to digital data is a ____.

Three currently popular modulation techniques for encoding digital data and transmitting it over analog signals are amplitude shift keying, frequency shift keying, and ____ shift keying.

The frequency range of the average human voice usually goes no lower than 300 Hz and no higher than approximately ____ Hz.

A(n) ____________________ converts the analog data to a digital signal by tracking the analog waveform and taking "snapshots" of the analog data at fixed intervals.

The big disadvantage of the Manchester schemes is that roughly half the time there will be two transitions during each bit.

The telephone system transmits signals in the range of 150 Hz to 1500 Hz.

When converting analog data to digital signals, the frequency at which the snapshots are taken is called the ____ rate.

The ____ digital encoding scheme is similar to the Manchester scheme in that there is always a transition in the middle of the interval.

Frequency shift keying is subject to ____.

ASCII is one of the supported code charts in Unicode.

The terms "data" and "signal" mean the same thing.

Under some circumstances, the baud rate may equal the bps, such as in the Manchester encoding schemes.

Using ____, when a device transmits a binary 0, a zero voltage is transmitted. When the device transmits a binary 1, either a positive voltage or a negative voltage is transmitted.

Like signals, data can be analog or digital.

____ is an 8-bit code allowing 256 possible combinations of textual symbols.