Baseband Transmission MCQ || Baseband Transmission Questions and Answers

Answer.4. Duobinary

Explanation:-

Duobinary data encoding is a form of correlative coding in partial response signaling. The modulator drive signal can be produced by adding one-bit-delayed data to the present data bit to give levels 0, 1, and 2. An identical effect can be achieved by applying a low-pass filter to the ideal binary data signal.

The duobinary scheme does error detection without introducing any additional error bits into the data sequence.

Answer.1. M-ary

Explanation:-

An M-ary transmission is a type of digital modulation where instead of transmitting one bit at a time, two or more bits are transmitted simultaneously. This type of transmission results in reduced channel bandwidth. However, sometimes, two or more quadrature carriers are used for modulation.

Answer.4. Bi-phase

Explanation:-

In telecommunication and data storage, Manchester code is also known as Bi-phase code, is a line code in which the encoding of each data bit is either low then high, or high then low, for equal time. It is a self-clocking signal with no DC component.

In manchester, coding transition occurs in the middle of every bit interval. Thus it has a feature of clocking.

Answer.2. Miller code

Explanation:-

Miller code This code is an alternative to the code. It has at least one transition every two-bit interval and there are never more than two transitions every two-bit interval. It thus provides good synchronization capabilities, while requiring less bandwidth than the Big signal.

Answer.3. Number of quantization levels

Explanation:-

The PCM word size can be described by the number of quantization levels that are used for each sample. The choice of the number of quantization levels, or bits per sample, depends on the magnitude of quantization distortion that one is willing to tolerate with the PCM format.

Answer.4. Multilevel codes

Explanation:-

• To increase the bandwidth efficiency of the system, a multilevel line code is sometimes used.
• A multilevel line code transmits more than one bit in each symbol.
• The pulses may have any one of the two amplitudes. Different amplitudes represent different information, and there are 4 variations available, two in the form of +ve and -ve polarities and two in the form of different amplitudes of the pulses.
• Thus, each pulse has two attributes, amplitude, and polarity; hence it conveys two information or two bits.

Answer.2. Symbol rate

Explanation:-

In a digitally modulated signal or a line code, symbol rate or modulation rate is the number of symbol changes, waveform changes, or signaling events across the transmission medium per unit of time. T is the time period of the signal. In pulse modulation, the symbol rate Rs can be given as a reciprocal of T.

Answer.1. NRZ

Explanation:-

The various PCM waveform types can be characterized by the probability of bit error versus signal-to-noise ratio. Some of the schemes are more immune than others to noise. For example, the NRZ waveforms have better error performance than does the unipolar RZ waveform.

Answer.3. Baseband, Formatting

Explanation:-

PCM appears in two places i.e the formatting part and the signaling of the baseband part. It is a formatting part because ADC involves sampling, quantization, and yielding binary digits (PAM to PCM) and it is a baseband signaling part because PCM waveforms are used to carry the PCM digits.

Answer.1. PCM Waveform

Explanation:-

When pulse modulation is applied to a binary symbol, the resulting binary waveform is called a PCM waveform. There are several types of PCM waveforms. In telephony applications, those waveforms are often called line codes. When pulse modulation is applied to a non-binary symbol, the resulting waveform is called M-ary pulse modulation waveform. There are several types of PCM.