The slope of the analog signal is greater than the delta modulator can maintain

A carrier recovery is needed with

Pulse – amplitude modulation signals are multiplexed by using

The biggest disadvantage of PCM is

Mark and space refer respectively to

Pulse width modulation may be generated

A transmission of binary data which involves the transmission of two non – zero voltage level

Part of the PCM system that prevents aliasing or foldover distortion

It is defined as the process of transforming messages or signals in accordance with a definite set of rules.

The PCM code for each channel occupies a fixed time slot called

The number of amplitude, frequency, or phase changes that take place per second is known as the

The basic modulator and demodulator circuits in PSK are

Information capacity is convenient to express as

Sampling technique that when the tops of the sample pulses retain their natural shape during the sample interval

A form of digital modulation similar to PSK except the digital information is contained in both the amplitude and the phase of the transmitted carrier.

For the 16-PSK and a transmission system with a 10kHz bandwidth, determine the maximum bit rate

The type of modulation most often used with direct-sequence spread spectrum is

In order to reduce quantizing noise, one must

Companding is used

Transmitting data as serial binary word is called _______.

Emphasizing low-level signals and compressing higher level signals is called

Sixteen different levels (symbols) are used to encode binary data. The channel bandwidth is 36 MHz. The maximum channel capacity is

What is the minimum bandwidth required to transmit a 56 kbps binary signal with no noise?

Type of PCM that uses single-bit PCM code to achieve digital transmission of analog signals

It is a delta modulation system where the step size of the digital-to-analog converter is automatically varied, depending on the analog input signal.

It is a popular type of line encoding that produces a strong timing component for clock recovery and does not cause wandering.

In a PAM/TDM system, keeping the multiplexer and DEMUX channels step with one another is done by a

Which of the following is correct?

The magnitude of a quantum in quantization of PCM codes.

Higher order TDM levels are obtained by

Results when the sample exceeds the highest quantization interval

The carrier used with a BPSK demodulator is

In digital modulation, if the information signal is digital and the amplitude of the carrier is varied proportional to the information signal.

Slow speed modems

What is the relationship of bit rate and baud in QPSK and 8-PSK?

A common method of achieving carrier recovery for BPSK

What is the relationship of bit rate and baud in FSK and PSK?

For a single-channel PCM system with a sample rate of 6000 samples per second and a seven-bit compressed PCM code, what is the line speed?

In delta modulation, the modulator is sometimes called _____.

For an 8-PSK system, operating with an information bit rate of 24 kbps, determine the bandwidth efficiency

Element of a PCM system that periodically samples the analog input signal and converts those samples to a multilevel PAM signal

Quadrature amplitude modulation is

The most common modulation system used for telegraphy is

In digital modulation, it is similar to standard amplitude modulation except there is only two amplitudes possible

A 9600-baud rate signal can pass over the voice grade telephone line if which kind of modulation is used?

The modulation system inherently most noise-resistant is

It is the most prevalent encoding technique used for TDM signals

The process of converting the analog sample into discrete form is called

The expression for bandwidth BW of a PCM system, where v is the number of bits per sample and FM is the modulating frequency, is given by

In digital transmission, the modulation technique that requires minimum bandwidth is

In Delta Modulation, the bit rate is

In Differential Pulse Code Modulation techniques, the decoding is performed by

Granular noise occurs when

The digital modulation technique in which the step size is varied according to the variation in the slope of the input is called

The digital modulation scheme in which the step size is not fixed is

In Adaptive Delta Modulation, the slope error reduces and

Polar coding is a technique in which

The polarities in NRZ format use

The format in which the positive half interval pulse is followed by a negative half interval pulse for transmission of ‘1’ is

The maximum synchronizing capability in coding techniques is present in

The advantage of using Manchester format of coding is

Alternate Mark Inversion (AMI) is also known as

In DPSK technique, the technique used to encode bits is

In Alternate Mark Inversion (AMI) is

The number of bits of data transmitted per second is called

The difficulty in achieving the Nyquist criterion for system design is

ASK modulated signal has the bandwidth

In Binary Phase Shift Keying system, the binary symbols 1 and 0 are represented by carrier with phase shift of

BPSK system modulates at the rate of

The binary waveform used to generate BPSK signal is encoded in

The bandwidth of BFSK is _________ than BPSK.

The frequency shifts in the BFSK usually lies in the range

The spectrum of BFSK may be viewed as the sum of

The maximum bandwidth is occupied by

QPSK is a modulation scheme where each symbol consists of

A QAM modulator does not use ____.

It is a form of phase-division multiplexing where two data channels modulate the same carrier frequency that is shifted 90 degrees in phase.

One eight-bit PCM code is called

A transmission of binary data which involves the transmission of only a single non-zero voltage level.

If the active time of the binary pulse is less than 100% of the bit time

The data rate of QPSK is _______ of BPSK.

QPSK system uses a phase shift of

Which modulation scheme is also called as onoff keying method?

In differential PSK the date is

M-ary signaling produces error performance with orthogonal signaling and error performance with multiple phase signaling.

In which system, bit stream is portioned into even and odd stream?

The error performance of MPSK as M or k increases.

In MPSK adding new signals make it vulnerable to noise and in MFSK ______ make it vulnerable.

The relation between the probability of bit error and probability of symbol error in M-ary orthogonal signalling is

Performance of BFSK signal is than BPSK.